Youngest Toba eruption: Difference between revisions
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=== Climate events around the time of eruption === |
=== Climate events around the time of eruption === |
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Greenland stadial 20 (GS20) is a millennium-long cold event in the north [[Atlantic Ocean|Atlantic ocean]] that started around the time of Toba eruption.<ref name=":12">{{Cite journal |last=Polyak |first=Victor J. |last2=Asmerom |first2=Yemane |last3=Lachniet |first3=Matthew S. |date=2017-09-01 |title=Rapid speleothem δ13C change in southwestern North America coincident with Greenland stadial 20 and the Toba (Indonesia) supereruption |url=http://pubs.geoscienceworld.org/geology/article/45/9/843/353465/Rapid-speleothem-%CE%B413C-change-in-southwestern-North |journal=Geology |language=en |volume=45 |issue=9 |pages=843–846 |doi=10.1130/G39149.1 |issn=0091-7613}}</ref> The timing of the initiation of GS20 is dated to 74.0–74.2 kyr, and the entire event lasted about 1,500 years.<ref name=":12" /><ref>{{Cite journal |last=Du |first=Wenjing |last2=Cheng |first2=Hai |last3=Xu |first3=Yao |last4=Yang |first4=Xunlin |last5=Zhang |first5=Pingzhong |last6=Sha |first6=Lijuan |last7=Li |first7=Hanying |last8=Zhu |first8=Xiaoyan |last9=Zhang |first9=Meiliang |last10=Stríkis |first10=Nicolás M. |last11=Cruz |first11=Francisco W. |last12=Edwards |first12=R. Lawrence |last13=Zhang |first13=Haiwei |last14=Ning |first14=Youfeng |date=2019 |title=Timing and structure of the weak Asian Monsoon event about 73,000 years ago |url=http://dx.doi.org/10.1016/j.quageo.2019.05.002 |journal=Quaternary Geochronology |volume=53 |pages=101003 |doi=10.1016/j.quageo.2019.05.002 |issn=1871-1014}}</ref> It is the stadial part of [[Dansgaard–Oeschger event]] 20 (DO20), commonly explained by an abrupt reduction in the strength of [[Atlantic meridional overturning circulation|Atlantic Meridional Overturning Circulation]] (AMOC). Weaker AMOC caused warming in [[Southern Ocean]] and [[Antarctica|Antartica]], and this asynchrony is known as [[Polar see-saw|bipolar seesaw]].<ref name=":13">{{Cite journal |last=Menviel |first=Laurie C. |last2=Skinner |first2=Luke C. |last3=Tarasov |first3=Lev |last4=Tzedakis |first4=Polychronis C. |date=2020 |title=An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |url=https://www.nature.com/articles/s43017-020-00106-y |journal=Nature Reviews Earth & Environment |language=en |volume=1 |issue=12 |pages=677–693 |doi=10.1038/s43017-020-00106-y |issn=2662-138X}}</ref><ref>{{Cite journal |last=Anderson |first=H. J. |last2=Pedro |first2=J. B. |last3=Bostock |first3=H. C. |last4=Chase |first4=Z. |last5=Noble |first5=T. L. |date=2021-03-01 |title=Compiled Southern Ocean sea surface temperatures correlate with Antarctic Isotope Maxima |url=https://www.sciencedirect.com/science/article/pii/S0277379121000287 |journal=Quaternary Science Reviews |volume=255 |pages=106821 |doi=10.1016/j.quascirev.2021.106821 |issn=0277-3791}}</ref> The start of GS20 cooling event corresponds to the start of Antarctic Isotope Maxima 19 (AIM19) warming event.<ref name=":6">{{Cite journal |last1=Svensson |first1=A. |last2=Bigler |first2=M. |last3=Blunier |first3=T. |last4=Clausen |first4=H. B. |last5=Dahl-Jensen |first5=D. |last6=Fischer |first6=H. |last7=Fujita |first7=S. |last8=Goto-Azuma |first8=K. |last9=Johnsen |first9=S. J. |last10=Kawamura |first10=K. |last11=Kipfstuhl |first11=S. |last12=Kohno |first12=M. |last13=Parrenin |first13=F. |last14=Popp |first14=T. |last15=Rasmussen |first15=S. O. |date=2013-03-19 |title=Direct linking of Greenland and Antarctic ice cores at the Toba eruption (74 ka BP) |url=https://cp.copernicus.org/articles/9/749/2013/ |journal=Climate of the Past |language=English |volume=9 |issue=2 |pages=749–766 |bibcode=2013CliPa...9..749S |doi=10.5194/cp-9-749-2013 |issn=1814-9324 |s2cid=17741316 |doi-access=free |hdl-access=free |hdl=2158/774798}}</ref> GS20 was associated with iceberg discharges into the North Atlantic, thus it was also named [[Heinrich event|Heinrich stadial 7a]].<ref>{{Cite journal |last=Davtian |first=Nina |last2=Bard |first2=Edouard |date=2023-03-13 |title=A new view on abrupt climate changes and the bipolar seesaw based on paleotemperatures from Iberian Margin sediments |url=http://dx.doi.org/10.1073/pnas.2209558120 |journal=Proceedings of the National Academy of Sciences |volume=120 |issue=12 |doi=10.1073/pnas.2209558120 |issn=0027-8424}}</ref> Heinrich events tend to be longer, colder and with weaker AMOC in the Atlantic ocean than other DO stadials.<ref name=":13" /> |
Greenland stadial 20 (GS20) is a millennium-long cold event in the north [[Atlantic Ocean|Atlantic ocean]] that started around the time of Toba eruption.<ref name=":12">{{Cite journal |last=Polyak |first=Victor J. |last2=Asmerom |first2=Yemane |last3=Lachniet |first3=Matthew S. |date=2017-09-01 |title=Rapid speleothem δ13C change in southwestern North America coincident with Greenland stadial 20 and the Toba (Indonesia) supereruption |url=http://pubs.geoscienceworld.org/geology/article/45/9/843/353465/Rapid-speleothem-%CE%B413C-change-in-southwestern-North |journal=Geology |language=en |volume=45 |issue=9 |pages=843–846 |doi=10.1130/G39149.1 |issn=0091-7613}}</ref> The timing of the initiation of GS20 is dated to 74.0–74.2 kyr, and the entire event lasted about 1,500 years.<ref name=":12" /><ref>{{Cite journal |last=Du |first=Wenjing |last2=Cheng |first2=Hai |last3=Xu |first3=Yao |last4=Yang |first4=Xunlin |last5=Zhang |first5=Pingzhong |last6=Sha |first6=Lijuan |last7=Li |first7=Hanying |last8=Zhu |first8=Xiaoyan |last9=Zhang |first9=Meiliang |last10=Stríkis |first10=Nicolás M. |last11=Cruz |first11=Francisco W. |last12=Edwards |first12=R. Lawrence |last13=Zhang |first13=Haiwei |last14=Ning |first14=Youfeng |date=2019 |title=Timing and structure of the weak Asian Monsoon event about 73,000 years ago |url=http://dx.doi.org/10.1016/j.quageo.2019.05.002 |journal=Quaternary Geochronology |volume=53 |pages=101003 |doi=10.1016/j.quageo.2019.05.002 |issn=1871-1014|doi-access=free }}</ref> It is the stadial part of [[Dansgaard–Oeschger event]] 20 (DO20), commonly explained by an abrupt reduction in the strength of [[Atlantic meridional overturning circulation|Atlantic Meridional Overturning Circulation]] (AMOC). Weaker AMOC caused warming in [[Southern Ocean]] and [[Antarctica|Antartica]], and this asynchrony is known as [[Polar see-saw|bipolar seesaw]].<ref name=":13">{{Cite journal |last=Menviel |first=Laurie C. |last2=Skinner |first2=Luke C. |last3=Tarasov |first3=Lev |last4=Tzedakis |first4=Polychronis C. |date=2020 |title=An ice–climate oscillatory framework for Dansgaard–Oeschger cycles |url=https://www.nature.com/articles/s43017-020-00106-y |journal=Nature Reviews Earth & Environment |language=en |volume=1 |issue=12 |pages=677–693 |doi=10.1038/s43017-020-00106-y |issn=2662-138X}}</ref><ref>{{Cite journal |last=Anderson |first=H. J. |last2=Pedro |first2=J. B. |last3=Bostock |first3=H. C. |last4=Chase |first4=Z. |last5=Noble |first5=T. L. |date=2021-03-01 |title=Compiled Southern Ocean sea surface temperatures correlate with Antarctic Isotope Maxima |url=https://www.sciencedirect.com/science/article/pii/S0277379121000287 |journal=Quaternary Science Reviews |volume=255 |pages=106821 |doi=10.1016/j.quascirev.2021.106821 |issn=0277-3791}}</ref> The start of GS20 cooling event corresponds to the start of Antarctic Isotope Maxima 19 (AIM19) warming event.<ref name=":6">{{Cite journal |last1=Svensson |first1=A. |last2=Bigler |first2=M. |last3=Blunier |first3=T. |last4=Clausen |first4=H. B. |last5=Dahl-Jensen |first5=D. |last6=Fischer |first6=H. |last7=Fujita |first7=S. |last8=Goto-Azuma |first8=K. |last9=Johnsen |first9=S. J. |last10=Kawamura |first10=K. |last11=Kipfstuhl |first11=S. |last12=Kohno |first12=M. |last13=Parrenin |first13=F. |last14=Popp |first14=T. |last15=Rasmussen |first15=S. O. |date=2013-03-19 |title=Direct linking of Greenland and Antarctic ice cores at the Toba eruption (74 ka BP) |url=https://cp.copernicus.org/articles/9/749/2013/ |journal=Climate of the Past |language=English |volume=9 |issue=2 |pages=749–766 |bibcode=2013CliPa...9..749S |doi=10.5194/cp-9-749-2013 |issn=1814-9324 |s2cid=17741316 |doi-access=free |hdl-access=free |hdl=2158/774798}}</ref> GS20 was associated with iceberg discharges into the North Atlantic, thus it was also named [[Heinrich event|Heinrich stadial 7a]].<ref>{{Cite journal |last=Davtian |first=Nina |last2=Bard |first2=Edouard |date=2023-03-13 |title=A new view on abrupt climate changes and the bipolar seesaw based on paleotemperatures from Iberian Margin sediments |url=http://dx.doi.org/10.1073/pnas.2209558120 |journal=Proceedings of the National Academy of Sciences |volume=120 |issue=12 |doi=10.1073/pnas.2209558120 |issn=0027-8424}}</ref> Heinrich events tend to be longer, colder and with weaker AMOC in the Atlantic ocean than other DO stadials.<ref name=":13" /> |
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From 74 to 58 [[kyr]], Earth transitioned from interglacial MIS 5 to glacial MIS 4, experiencing cooling and glacial expansion.<ref>{{Cite journal |last1=Menking |first1=James A. |last2=Shackleton |first2=Sarah A. |last3=Bauska |first3=Thomas K. |last4=Buffen |first4=Aron M. |last5=Brook |first5=Edward J. |last6=Barker |first6=Stephen |last7=Severinghaus |first7=Jeffrey P. |last8=Dyonisius |first8=Michael N. |last9=Petrenko |first9=Vasilii V. |date=2022-09-16 |title=Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |journal=Nature Communications |language=en |volume=13 |issue=1 |pages=5443 |doi=10.1038/s41467-022-33166-3 |pmid=36114188 |pmc=9481522 |issn=2041-1723}}</ref><ref>{{Cite journal |last=Doughty |first=Alice M. |last2=Kaplan |first2=Michael R. |last3=Peltier |first3=Carly |last4=Barker |first4=Stephen |date=2021 |title=A maximum in global glacier extent during MIS 4 |url=http://dx.doi.org/10.1016/j.quascirev.2021.106948 |journal=Quaternary Science Reviews |volume=261 |pages=106948 |doi=10.1016/j.quascirev.2021.106948 |issn=0277-3791}}</ref> This transition is a part of Pleistocene interglacial-glacial cycle driven by variations in the earth's orbit.<ref>{{Cite journal |last1=Hays |first1=J. D. |last2=Imbrie |first2=John |last3=Shackleton |first3=N. J. |date=1976-12-10 |title=Variations in the Earth's Orbit: Pacemaker of the Ice Ages: For 500,000 years, major climatic changes have followed variations in obliquity and precession. |url=https://www.science.org/doi/10.1126/science.194.4270.1121 |journal=Science |language=en |volume=194 |issue=4270 |pages=1121–1132 |doi=10.1126/science.194.4270.1121 |pmid=17790893 |issn=0036-8075}}</ref> Ocean temperature cooled by {{convert|0.9|C-change|F-change}}.<ref>{{Cite journal |last1=Shackleton |first1=Sarah |last2=Menking |first2=James A. |last3=Brook |first3=Edward |last4=Buizert |first4=Christo |last5=Dyonisius |first5=Michael N. |last6=Petrenko |first6=Vasilii V. |last7=Baggenstos |first7=Daniel |last8=Severinghaus |first8=Jeffrey P. |date=2021-10-27 |title=Evolution of mean ocean temperature in Marine Isotope Stage 4 |url=https://cp.copernicus.org/articles/17/2273/2021/ |journal=Climate of the Past |language=English |volume=17 |issue=5 |pages=2273–2289 |doi=10.5194/cp-17-2273-2021 |doi-access=free |issn=1814-9324}}</ref> Sea level fell {{convert|60|m|ft|abbr=on}}.<ref>{{Cite journal |last1=Cutler |first1=K.B |last2=Edwards |first2=R.L |last3=Taylor |first3=F.W |last4=Cheng |first4=H |last5=Adkins |first5=J |last6=Gallup |first6=C.D |last7=Cutler |first7=P.M |last8=Burr |first8=G.S |last9=Bloom |first9=A.L |date=2003 |title=Rapid sea-level fall and deep-ocean temperature change since the last interglacial period |url=http://dx.doi.org/10.1016/s0012-821x(02)01107-x |journal=Earth and Planetary Science Letters |volume=206 |issue=3–4 |pages=253–271 |doi=10.1016/s0012-821x(02)01107-x |issn=0012-821X}}</ref> Northern Hemisphere ice sheets embarked on significant expansion and surpassed the extent of [[Last Glacial Maximum]] in [[eastern Europe]], [[Northeast Asia]] and the [[North American Cordillera]].<ref>{{Cite journal |last1=Batchelor |first1=Christine L. |last2=Margold |first2=Martin |last3=Krapp |first3=Mario |last4=Murton |first4=Della K. |last5=Dalton |first5=April S. |last6=Gibbard |first6=Philip L. |last7=Stokes |first7=Chris R. |last8=Murton |first8=Julian B. |last9=Manica |first9=Andrea |date=2019-08-16 |title=The configuration of Northern Hemisphere ice sheets through the Quaternary |journal=Nature Communications |language=en |volume=10 |issue=1 |pages=3713 |doi=10.1038/s41467-019-11601-2 |pmid=31420542 |pmc=6697730 |issn=2041-1723}}</ref> Southern Hemisphere glaciation grew to its maximum extent during MIS 4.<ref>{{Cite journal |last1=Schaefer |first1=Joerg M. |last2=Putnam |first2=Aaron E. |last3=Denton |first3=George H. |last4=Kaplan |first4=Michael R. |last5=Birkel |first5=Sean |last6=Doughty |first6=Alice M. |last7=Kelley |first7=Sam |last8=Barrell |first8=David J.A. |last9=Finkel |first9=Robert C. |last10=Winckler |first10=Gisela |last11=Anderson |first11=Robert F. |last12=Ninneman |first12=Ulysses S. |last13=Barker |first13=Stephen |last14=Schwartz |first14=Roseanne |last15=Andersen |first15=Bjorn G. |date=2015 |title=The Southern Glacial Maximum 65,000 years ago and its Unfinished Termination |url=https://linkinghub.elsevier.com/retrieve/pii/S0277379115000657 |journal=Quaternary Science Reviews |language=en |volume=114 |pages=52–60 |doi=10.1016/j.quascirev.2015.02.009}}</ref> [[Australasia|Australasian region]], Africa and Europe were characterized by increasingly cold and [[Aridity|arid]] environment.<ref>{{Cite journal |last1=Stewart |first1=John R. |last2=Fenberg |first2=Phillip B. |date=2018-05-01 |title=A climatic context for the out-of-Africa migration: COMMENT |url=http://dx.doi.org/10.1130/g40057c.1 |journal=Geology |volume=46 |issue=5 |pages=e442 |doi=10.1130/g40057c.1 |issn=0091-7613}}</ref><ref>{{Cite journal |last=Helmens |first=Karin F. |date=2014 |title=The Last Interglacial–Glacial cycle (MIS 5–2) re-examined based on long proxy records from central and northern Europe |url=http://dx.doi.org/10.1016/j.quascirev.2013.12.012 |journal=Quaternary Science Reviews |volume=86 |pages=115–143 |doi=10.1016/j.quascirev.2013.12.012 |issn=0277-3791}}</ref><ref>{{Cite journal |last1=De Deckker |first1=Patrick |last2=Arnold |first2=Lee J. |last3=van der Kaars |first3=Sander |last4=Bayon |first4=Germain |last5=Stuut |first5=Jan-Berend W. |last6=Perner |first6=Kerstin |last7=Lopes dos Santos |first7=Raquel |last8=Uemura |first8=Ryu |last9=Demuro |first9=Martina |date=2019 |title=Marine Isotope Stage 4 in Australasia: A full glacial culminating 65,000 years ago – Global connections and implications for human dispersal |url=http://dx.doi.org/10.1016/j.quascirev.2018.11.017 |journal=Quaternary Science Reviews |volume=204 |pages=187–207 |doi=10.1016/j.quascirev.2018.11.017 |issn=0277-3791}}</ref> |
From 74 to 58 [[kyr]], Earth transitioned from interglacial MIS 5 to glacial MIS 4, experiencing cooling and glacial expansion.<ref>{{Cite journal |last1=Menking |first1=James A. |last2=Shackleton |first2=Sarah A. |last3=Bauska |first3=Thomas K. |last4=Buffen |first4=Aron M. |last5=Brook |first5=Edward J. |last6=Barker |first6=Stephen |last7=Severinghaus |first7=Jeffrey P. |last8=Dyonisius |first8=Michael N. |last9=Petrenko |first9=Vasilii V. |date=2022-09-16 |title=Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4 |journal=Nature Communications |language=en |volume=13 |issue=1 |pages=5443 |doi=10.1038/s41467-022-33166-3 |pmid=36114188 |pmc=9481522 |issn=2041-1723}}</ref><ref>{{Cite journal |last=Doughty |first=Alice M. |last2=Kaplan |first2=Michael R. |last3=Peltier |first3=Carly |last4=Barker |first4=Stephen |date=2021 |title=A maximum in global glacier extent during MIS 4 |url=http://dx.doi.org/10.1016/j.quascirev.2021.106948 |journal=Quaternary Science Reviews |volume=261 |pages=106948 |doi=10.1016/j.quascirev.2021.106948 |issn=0277-3791}}</ref> This transition is a part of Pleistocene interglacial-glacial cycle driven by variations in the earth's orbit.<ref>{{Cite journal |last1=Hays |first1=J. D. |last2=Imbrie |first2=John |last3=Shackleton |first3=N. J. |date=1976-12-10 |title=Variations in the Earth's Orbit: Pacemaker of the Ice Ages: For 500,000 years, major climatic changes have followed variations in obliquity and precession. |url=https://www.science.org/doi/10.1126/science.194.4270.1121 |journal=Science |language=en |volume=194 |issue=4270 |pages=1121–1132 |doi=10.1126/science.194.4270.1121 |pmid=17790893 |issn=0036-8075}}</ref> Ocean temperature cooled by {{convert|0.9|C-change|F-change}}.<ref>{{Cite journal |last1=Shackleton |first1=Sarah |last2=Menking |first2=James A. |last3=Brook |first3=Edward |last4=Buizert |first4=Christo |last5=Dyonisius |first5=Michael N. |last6=Petrenko |first6=Vasilii V. |last7=Baggenstos |first7=Daniel |last8=Severinghaus |first8=Jeffrey P. |date=2021-10-27 |title=Evolution of mean ocean temperature in Marine Isotope Stage 4 |url=https://cp.copernicus.org/articles/17/2273/2021/ |journal=Climate of the Past |language=English |volume=17 |issue=5 |pages=2273–2289 |doi=10.5194/cp-17-2273-2021 |doi-access=free |issn=1814-9324}}</ref> Sea level fell {{convert|60|m|ft|abbr=on}}.<ref>{{Cite journal |last1=Cutler |first1=K.B |last2=Edwards |first2=R.L |last3=Taylor |first3=F.W |last4=Cheng |first4=H |last5=Adkins |first5=J |last6=Gallup |first6=C.D |last7=Cutler |first7=P.M |last8=Burr |first8=G.S |last9=Bloom |first9=A.L |date=2003 |title=Rapid sea-level fall and deep-ocean temperature change since the last interglacial period |url=http://dx.doi.org/10.1016/s0012-821x(02)01107-x |journal=Earth and Planetary Science Letters |volume=206 |issue=3–4 |pages=253–271 |doi=10.1016/s0012-821x(02)01107-x |issn=0012-821X}}</ref> Northern Hemisphere ice sheets embarked on significant expansion and surpassed the extent of [[Last Glacial Maximum]] in [[eastern Europe]], [[Northeast Asia]] and the [[North American Cordillera]].<ref>{{Cite journal |last1=Batchelor |first1=Christine L. |last2=Margold |first2=Martin |last3=Krapp |first3=Mario |last4=Murton |first4=Della K. |last5=Dalton |first5=April S. |last6=Gibbard |first6=Philip L. |last7=Stokes |first7=Chris R. |last8=Murton |first8=Julian B. |last9=Manica |first9=Andrea |date=2019-08-16 |title=The configuration of Northern Hemisphere ice sheets through the Quaternary |journal=Nature Communications |language=en |volume=10 |issue=1 |pages=3713 |doi=10.1038/s41467-019-11601-2 |pmid=31420542 |pmc=6697730 |issn=2041-1723}}</ref> Southern Hemisphere glaciation grew to its maximum extent during MIS 4.<ref>{{Cite journal |last1=Schaefer |first1=Joerg M. |last2=Putnam |first2=Aaron E. |last3=Denton |first3=George H. |last4=Kaplan |first4=Michael R. |last5=Birkel |first5=Sean |last6=Doughty |first6=Alice M. |last7=Kelley |first7=Sam |last8=Barrell |first8=David J.A. |last9=Finkel |first9=Robert C. |last10=Winckler |first10=Gisela |last11=Anderson |first11=Robert F. |last12=Ninneman |first12=Ulysses S. |last13=Barker |first13=Stephen |last14=Schwartz |first14=Roseanne |last15=Andersen |first15=Bjorn G. |date=2015 |title=The Southern Glacial Maximum 65,000 years ago and its Unfinished Termination |url=https://linkinghub.elsevier.com/retrieve/pii/S0277379115000657 |journal=Quaternary Science Reviews |language=en |volume=114 |pages=52–60 |doi=10.1016/j.quascirev.2015.02.009}}</ref> [[Australasia|Australasian region]], Africa and Europe were characterized by increasingly cold and [[Aridity|arid]] environment.<ref>{{Cite journal |last1=Stewart |first1=John R. |last2=Fenberg |first2=Phillip B. |date=2018-05-01 |title=A climatic context for the out-of-Africa migration: COMMENT |url=http://dx.doi.org/10.1130/g40057c.1 |journal=Geology |volume=46 |issue=5 |pages=e442 |doi=10.1130/g40057c.1 |issn=0091-7613}}</ref><ref>{{Cite journal |last=Helmens |first=Karin F. |date=2014 |title=The Last Interglacial–Glacial cycle (MIS 5–2) re-examined based on long proxy records from central and northern Europe |url=http://dx.doi.org/10.1016/j.quascirev.2013.12.012 |journal=Quaternary Science Reviews |volume=86 |pages=115–143 |doi=10.1016/j.quascirev.2013.12.012 |issn=0277-3791}}</ref><ref>{{Cite journal |last1=De Deckker |first1=Patrick |last2=Arnold |first2=Lee J. |last3=van der Kaars |first3=Sander |last4=Bayon |first4=Germain |last5=Stuut |first5=Jan-Berend W. |last6=Perner |first6=Kerstin |last7=Lopes dos Santos |first7=Raquel |last8=Uemura |first8=Ryu |last9=Demuro |first9=Martina |date=2019 |title=Marine Isotope Stage 4 in Australasia: A full glacial culminating 65,000 years ago – Global connections and implications for human dispersal |url=http://dx.doi.org/10.1016/j.quascirev.2018.11.017 |journal=Quaternary Science Reviews |volume=204 |pages=187–207 |doi=10.1016/j.quascirev.2018.11.017 |issn=0277-3791}}</ref> |
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==Possible effects on ''Homo''== |
==Possible effects on ''Homo''== |
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At least two other ''[[Homo]]'' lineages, [[Neanderthal|''H. neanderthals'']], and [[Denisovan|Denisovans]], survived the Toba eruption and subsequent MIS 4 ice age, as their latest presence are dated to ca. 40 kyr,<ref>{{Cite journal |last=Higham |first=Tom |last2=Douka |first2=Katerina |last3=Wood |first3=Rachel |last4=Ramsey |first4=Christopher Bronk |last5=Brock |first5=Fiona |last6=Basell |first6=Laura |last7=Camps |first7=Marta |last8=Arrizabalaga |first8=Alvaro |last9=Baena |first9=Javier |last10=Barroso-Ruíz |first10=Cecillio |last11=Bergman |first11=Christopher |last12=Boitard |first12=Coralie |last13=Boscato |first13=Paolo |last14=Caparrós |first14=Miguel |last15=Conard |first15=Nicholas J. |date=2014 |title=The timing and spatiotemporal patterning of Neanderthal disappearance |url=https://www.nature.com/articles/nature13621 |journal=Nature |language=en |volume=512 |issue=7514 |pages=306–309 |doi=10.1038/nature13621 |issn=1476-4687}}</ref> and ca. 55 kyr.<ref>{{Cite journal |last=Jacobs |first=Zenobia |last2=Li |first2=Bo |last3=Shunkov |first3=Michael V. |last4=Kozlikin |first4=Maxim B. |last5=Bolikhovskaya |first5=Nataliya S. |last6=Agadjanian |first6=Alexander K. |last7=Uliyanov |first7=Vladimir A. |last8=Vasiliev |first8=Sergei K. |last9=O’Gorman |first9=Kieran |last10=Derevianko |first10=Anatoly P. |last11=Roberts |first11=Richard G. |date=2019 |title=Timing of archaic hominin occupation of Denisova Cave in southern Siberia |url=https://www.nature.com/articles/s41586-018-0843-2 |journal=Nature |language=en |volume=565 |issue=7741 |pages=594–599 |doi=10.1038/s41586-018-0843-2 |issn=1476-4687}}</ref> Other lineages including ''[[Homo floresiensis|H. floresiensis]]'',<ref>{{Cite journal |last=Sutikna |first=Thomas |last2=Tocheri |first2=Matthew W. |last3=Morwood |first3=Michael J. |last4=Saptomo |first4=E. Wahyu |last5=Jatmiko |last6=Awe |first6=Rokus Due |last7=Wasisto |first7=Sri |last8=Westaway |first8=Kira E. |last9=Aubert |first9=Maxime |last10=Li |first10=Bo |last11=Zhao |first11=Jian-xin |last12=Storey |first12=Michael |last13=Alloway |first13=Brent V. |last14=Morley |first14=Mike W. |last15=Meijer |first15=Hanneke J. M. |date=2016 |title=Revised stratigraphy and chronology for Homo floresiensis at Liang Bua in Indonesia |url=https://www.nature.com/articles/nature17179 |journal=Nature |language=en |volume=532 |issue=7599 |pages=366–369 |doi=10.1038/nature17179 |issn=1476-4687}}</ref> ''[[Homo luzonensis|H. luzonensis]]'',<ref>{{Cite journal |last=Détroit |first=Florent |last2=Mijares |first2=Armand Salvador |last3=Corny |first3=Julien |last4=Daver |first4=Guillaume |last5=Zanolli |first5=Clément |last6=Dizon |first6=Eusebio |last7=Robles |first7=Emil |last8=Grün |first8=Rainer |last9=Piper |first9=Philip J. |date=2019 |title=A new species of Homo from the Late Pleistocene of the Philippines |url=https://www.nature.com/articles/s41586-019-1067-9 |journal=Nature |language=en |volume=568 |issue=7751 |pages=181–186 |doi=10.1038/s41586-019-1067-9 |issn=1476-4687}}</ref> and [[Penghu 1]]<ref>{{Cite journal |last=Chang |first=Chun-Hsiang |last2=Kaifu |first2=Yousuke |last3=Takai |first3=Masanaru |last4=Kono |first4=Reiko T. |last5=Grün |first5=Rainer |last6=Matsu’ura |first6=Shuji |last7=Kinsley |first7=Les |last8=Lin |first8=Liang-Kong |date=2015-01-27 |title=The first archaic Homo from Taiwan |url=https://www.nature.com/articles/ncomms7037 |journal=Nature Communications |language=en |volume=6 |issue=1 |pages=6037 |doi=10.1038/ncomms7037 |issn=2041-1723}}</ref> may had also survived through the eruption. More recently, reconstructions of human demographic history using [[Whole genome sequencing|whole-genome sequencing]]<ref>{{Cite journal |last=Mallick |first=Swapan |last2=Li |first2=Heng |last3=Lipson |first3=Mark |last4=Mathieson |first4=Iain |last5=Gymrek |first5=Melissa |last6=Racimo |first6=Fernando |last7=Zhao |first7=Mengyao |last8=Chennagiri |first8=Niru |last9=Nordenfelt |first9=Susanne |last10=Tandon |first10=Arti |last11=Skoglund |first11=Pontus |last12=Lazaridis |first12=Iosif |last13=Sankararaman |first13=Sriram |last14=Fu |first14=Qiaomei |last15=Rohland |first15=Nadin |date=2016 |title=The Simons Genome Diversity Project: 300 genomes from 142 diverse populations |url=https://www.nature.com/articles/nature18964 |journal=Nature |language=en |volume=538 |issue=7624 |pages=201–206 |doi=10.1038/nature18964 |issn=1476-4687}}</ref><ref>{{Cite journal |last=A |first=Bergstrom |last2=SA |first2=McCarthy |last3=R |first3=Hui |last4=MA |first4=Almarri |last5=Q |first5=Ayub |last6=P |first6=Danecek |last7=Y |first7=Chen |last8=S |first8=Felkel |last9=P |first9=Hallast |last10=J |first10=Kamm |last11=H |first11=Blanche |last12=JF |first12=Deleuze |last13=H |first13=Cann |last14=S |first14=Mallick |last15=D |first15=Reich |date=2020-10-23 |title=Insights into human genetic variation and population history from 929 diverse genomes |url=http://dx.doi.org/10.1530/ey.17.14.4 |journal=Yearbook of Paediatric Endocrinology |doi=10.1530/ey.17.14.4 |issn=1662-4009}}</ref><ref>{{Cite journal |last=Fan |first=Shaohua |last2=Spence |first2=Jeffrey P. |last3=Feng |first3=Yuanqing |last4=Hansen |first4=Matthew E.B. |last5=Terhorst |first5=Jonathan |last6=Beltrame |first6=Marcia H. |last7=Ranciaro |first7=Alessia |last8=Hirbo |first8=Jibril |last9=Beggs |first9=William |last10=Thomas |first10=Neil |last11=Nyambo |first11=Thomas |last12=Mpoloka |first12=Sununguko Wata |last13=Mokone |first13=Gaonyadiwe George |last14=Njamnshi |first14=Alfred K. |last15=Fokunang |first15=Charles |date=2023 |title=Whole-genome sequencing reveals a complex African population demographic history and signatures of local adaptation |url=http://dx.doi.org/10.1016/j.cell.2023.01.042 |journal=Cell |volume=186 |issue=5 |pages=923–939.e14 |doi=10.1016/j.cell.2023.01.042 |issn=0092-8674}}</ref> and discoveries of archaeological cultures with Toba ash layer<ref>{{Cite journal |last=Petraglia |first=Michael |last2=Korisettar |first2=Ravi |last3=Boivin |first3=Nicole |last4=Clarkson |first4=Christopher |last5=Ditchfield |first5=Peter |last6=Jones |first6=Sacha |last7=Koshy |first7=Jinu |last8=Lahr |first8=Marta Mirazón |last9=Oppenheimer |first9=Clive |last10=Pyle |first10=David |last11=Roberts |first11=Richard |last12=Schwenninger |first12=Jean-Luc |last13=Arnold |first13=Lee |last14=White |first14=Kevin |date=2007-07-06 |title=Middle Paleolithic Assemblages from the Indian Subcontinent Before and After the Toba Super-Eruption |url=http://dx.doi.org/10.1126/science.1141564 |journal=Science |volume=317 |issue=5834 |pages=114–116 |doi=10.1126/science.1141564 |issn=0036-8075}}</ref><ref name=":8" /><ref name=":16" /> add further light to how humans had fared during the eruption and the following GS20 and MIS 4 ice age. |
At least two other ''[[Homo]]'' lineages, [[Neanderthal|''H. neanderthals'']], and [[Denisovan|Denisovans]], survived the Toba eruption and subsequent MIS 4 ice age, as their latest presence are dated to ca. 40 kyr,<ref>{{Cite journal |last=Higham |first=Tom |last2=Douka |first2=Katerina |last3=Wood |first3=Rachel |last4=Ramsey |first4=Christopher Bronk |last5=Brock |first5=Fiona |last6=Basell |first6=Laura |last7=Camps |first7=Marta |last8=Arrizabalaga |first8=Alvaro |last9=Baena |first9=Javier |last10=Barroso-Ruíz |first10=Cecillio |last11=Bergman |first11=Christopher |last12=Boitard |first12=Coralie |last13=Boscato |first13=Paolo |last14=Caparrós |first14=Miguel |last15=Conard |first15=Nicholas J. |date=2014 |title=The timing and spatiotemporal patterning of Neanderthal disappearance |url=https://www.nature.com/articles/nature13621 |journal=Nature |language=en |volume=512 |issue=7514 |pages=306–309 |doi=10.1038/nature13621 |issn=1476-4687}}</ref> and ca. 55 kyr.<ref>{{Cite journal |last=Jacobs |first=Zenobia |last2=Li |first2=Bo |last3=Shunkov |first3=Michael V. |last4=Kozlikin |first4=Maxim B. |last5=Bolikhovskaya |first5=Nataliya S. |last6=Agadjanian |first6=Alexander K. |last7=Uliyanov |first7=Vladimir A. |last8=Vasiliev |first8=Sergei K. |last9=O’Gorman |first9=Kieran |last10=Derevianko |first10=Anatoly P. |last11=Roberts |first11=Richard G. |date=2019 |title=Timing of archaic hominin occupation of Denisova Cave in southern Siberia |url=https://www.nature.com/articles/s41586-018-0843-2 |journal=Nature |language=en |volume=565 |issue=7741 |pages=594–599 |doi=10.1038/s41586-018-0843-2 |issn=1476-4687}}</ref> Other lineages including ''[[Homo floresiensis|H. floresiensis]]'',<ref>{{Cite journal |last=Sutikna |first=Thomas |last2=Tocheri |first2=Matthew W. |last3=Morwood |first3=Michael J. |last4=Saptomo |first4=E. Wahyu |last5=Jatmiko |last6=Awe |first6=Rokus Due |last7=Wasisto |first7=Sri |last8=Westaway |first8=Kira E. |last9=Aubert |first9=Maxime |last10=Li |first10=Bo |last11=Zhao |first11=Jian-xin |last12=Storey |first12=Michael |last13=Alloway |first13=Brent V. |last14=Morley |first14=Mike W. |last15=Meijer |first15=Hanneke J. M. |date=2016 |title=Revised stratigraphy and chronology for Homo floresiensis at Liang Bua in Indonesia |url=https://www.nature.com/articles/nature17179 |journal=Nature |language=en |volume=532 |issue=7599 |pages=366–369 |doi=10.1038/nature17179 |issn=1476-4687}}</ref> ''[[Homo luzonensis|H. luzonensis]]'',<ref>{{Cite journal |last=Détroit |first=Florent |last2=Mijares |first2=Armand Salvador |last3=Corny |first3=Julien |last4=Daver |first4=Guillaume |last5=Zanolli |first5=Clément |last6=Dizon |first6=Eusebio |last7=Robles |first7=Emil |last8=Grün |first8=Rainer |last9=Piper |first9=Philip J. |date=2019 |title=A new species of Homo from the Late Pleistocene of the Philippines |url=https://www.nature.com/articles/s41586-019-1067-9 |journal=Nature |language=en |volume=568 |issue=7751 |pages=181–186 |doi=10.1038/s41586-019-1067-9 |issn=1476-4687}}</ref> and [[Penghu 1]]<ref>{{Cite journal |last=Chang |first=Chun-Hsiang |last2=Kaifu |first2=Yousuke |last3=Takai |first3=Masanaru |last4=Kono |first4=Reiko T. |last5=Grün |first5=Rainer |last6=Matsu’ura |first6=Shuji |last7=Kinsley |first7=Les |last8=Lin |first8=Liang-Kong |date=2015-01-27 |title=The first archaic Homo from Taiwan |url=https://www.nature.com/articles/ncomms7037 |journal=Nature Communications |language=en |volume=6 |issue=1 |pages=6037 |doi=10.1038/ncomms7037 |issn=2041-1723|hdl=1885/12938 |hdl-access=free }}</ref> may had also survived through the eruption. More recently, reconstructions of human demographic history using [[Whole genome sequencing|whole-genome sequencing]]<ref>{{Cite journal |last=Mallick |first=Swapan |last2=Li |first2=Heng |last3=Lipson |first3=Mark |last4=Mathieson |first4=Iain |last5=Gymrek |first5=Melissa |last6=Racimo |first6=Fernando |last7=Zhao |first7=Mengyao |last8=Chennagiri |first8=Niru |last9=Nordenfelt |first9=Susanne |last10=Tandon |first10=Arti |last11=Skoglund |first11=Pontus |last12=Lazaridis |first12=Iosif |last13=Sankararaman |first13=Sriram |last14=Fu |first14=Qiaomei |last15=Rohland |first15=Nadin |date=2016 |title=The Simons Genome Diversity Project: 300 genomes from 142 diverse populations |url=https://www.nature.com/articles/nature18964 |journal=Nature |language=en |volume=538 |issue=7624 |pages=201–206 |doi=10.1038/nature18964 |issn=1476-4687|hdl=11336/125570 |hdl-access=free }}</ref><ref>{{Cite journal |last=A |first=Bergstrom |last2=SA |first2=McCarthy |last3=R |first3=Hui |last4=MA |first4=Almarri |last5=Q |first5=Ayub |last6=P |first6=Danecek |last7=Y |first7=Chen |last8=S |first8=Felkel |last9=P |first9=Hallast |last10=J |first10=Kamm |last11=H |first11=Blanche |last12=JF |first12=Deleuze |last13=H |first13=Cann |last14=S |first14=Mallick |last15=D |first15=Reich |date=2020-10-23 |title=Insights into human genetic variation and population history from 929 diverse genomes |url=http://dx.doi.org/10.1530/ey.17.14.4 |journal=Yearbook of Paediatric Endocrinology |doi=10.1530/ey.17.14.4 |issn=1662-4009}}</ref><ref>{{Cite journal |last=Fan |first=Shaohua |last2=Spence |first2=Jeffrey P. |last3=Feng |first3=Yuanqing |last4=Hansen |first4=Matthew E.B. |last5=Terhorst |first5=Jonathan |last6=Beltrame |first6=Marcia H. |last7=Ranciaro |first7=Alessia |last8=Hirbo |first8=Jibril |last9=Beggs |first9=William |last10=Thomas |first10=Neil |last11=Nyambo |first11=Thomas |last12=Mpoloka |first12=Sununguko Wata |last13=Mokone |first13=Gaonyadiwe George |last14=Njamnshi |first14=Alfred K. |last15=Fokunang |first15=Charles |date=2023 |title=Whole-genome sequencing reveals a complex African population demographic history and signatures of local adaptation |url=http://dx.doi.org/10.1016/j.cell.2023.01.042 |journal=Cell |volume=186 |issue=5 |pages=923–939.e14 |doi=10.1016/j.cell.2023.01.042 |issn=0092-8674|pmc=10568978 }}</ref> and discoveries of archaeological cultures with Toba ash layer<ref>{{Cite journal |last=Petraglia |first=Michael |last2=Korisettar |first2=Ravi |last3=Boivin |first3=Nicole |last4=Clarkson |first4=Christopher |last5=Ditchfield |first5=Peter |last6=Jones |first6=Sacha |last7=Koshy |first7=Jinu |last8=Lahr |first8=Marta Mirazón |last9=Oppenheimer |first9=Clive |last10=Pyle |first10=David |last11=Roberts |first11=Richard |last12=Schwenninger |first12=Jean-Luc |last13=Arnold |first13=Lee |last14=White |first14=Kevin |date=2007-07-06 |title=Middle Paleolithic Assemblages from the Indian Subcontinent Before and After the Toba Super-Eruption |url=http://dx.doi.org/10.1126/science.1141564 |journal=Science |volume=317 |issue=5834 |pages=114–116 |doi=10.1126/science.1141564 |issn=0036-8075}}</ref><ref name=":8" /><ref name=":16" /> add further light to how humans had fared during the eruption and the following GS20 and MIS 4 ice age. |
||
===Human demographic history=== |
===Human demographic history=== |
Revision as of 06:46, 13 May 2024
Toba eruption theory | |
---|---|
Volcano | Toba Caldera Complex |
Date | c. 74,000 years BP |
Location | Sumatra, Indonesia 2°41′04″N 98°52′32″E / 2.6845°N 98.8756°E |
VEI | 8 |
Impact | Impact disputed |
Deaths | (Potentially) almost all of humanity, leaving around 3,000–10,000 humans left on the planet |
Lake Toba is the resulting crater lake |
The Toba eruption (sometimes called the Toba supereruption or the Youngest Toba eruption) was a supervolcano eruption that occurred about 74,000 years ago during the Late Pleistocene[1] at the site of present-day Lake Toba in Sumatra, Indonesia. It is one of the largest known explosive eruptions in the Earth's history. The Toba catastrophe theory is that this event caused a severe global volcanic winter of six to ten years and contributed to a 1,000-year-long cooling episode, resulting in a genetic bottleneck in humans.[2][3] However, some physical evidence disputes the association with the millennium-long cold event and genetic bottleneck, and some consider the theory disproven.[4][5][6][7][8]
History
In 1972, an analysis of human hemoglobins found very few variants, and to account for the low frequency of variation human population must have been as low as a few thousand until very recently.[9] More genetic studies confirmed an effective population on the order of 10,000 for much of human history.[10][11] Subsequent research on the differences in human mitochondrial DNA sequences dated a rapid growth from a small effective population size of 1,000 to 10,000, sometime between 35,000 and 65,000 years ago.[12][13][14]
The large magnitude of the Toba eruption has been known since 1939, and various techniques dated the timing of the event to 73,000 to 75,000 years ago.[15] A study published in 1993 suggested that the eruption accelerated climate and environmental transition from the last interglacial period MIS 5 to the last glacial period MIS 4.[16]
In 1993, science journalist Ann Gibbons posited that population growth was suppressed by the cold climate of the last Pleistocene Ice Age, possibly exacerbated by the Toba eruption. The subsequent explosive human expansion was believed to be the result of the end of the ice age.[17] Geologist Michael R. Rampino of New York University and volcanologist Stephen Self of the University of Hawaiʻi at Mānoa supported her theory.[18] In 1998, anthropologist Stanley H. Ambrose of the University of Illinois Urbana-Champaign hypothesized that the Toba eruption caused a human population crash to only a few thousand surviving individuals, and the subsequent recovery was suppressed by the global glacial condition of MIS 4 until the climate eventually transitioned to the warmer condition of MIS 3 about 60,000 years ago, during which rapid human population expansion occurred.[2]
Toba eruption
The most recent estimate of eruptive volume is 3,800 km3 (910 cu mi) dense-rock equivalent (DRE), of which 1,800 km3 (430 cu mi) was deposited as ash fall and 2,000 km3 (480 cu mi) as ignimbrite, making this eruption the largest during the Quaternary period.[19] Previous volume estimates have ranged from 2,000 km3 (480 cu mi)[15] to 6,000 km3 (1,400 cu mi).[20] Inside the caldera, the maximum thickness of pyroclastic flows is over 600 m (2,000 ft).[21] The outflow sheet originally covered an area of 20,000–30,000 km2 (7,700–11,600 sq mi) with thickness nearly 100 m (330 ft), likely reaching into the Indian Ocean and the Straits of Malacca.[22] The air-fall of this eruption blanketed Indian subcontinent in a layer of 5 cm (2.0 in) ash,[23] Arabian Sea in 1 mm (0.039 in),[24] South China Sea in 3.5 cm (1.4 in),[25] and Central Indian Ocean Basin in 10 cm (3.9 in).[26] Its horizon of ashfall covered an area of more than 38,000,000 km2 (15,000,000 sq mi) in 1 cm (0.39 in) or more thickness.[19] In Sub-Saharan Africa, microscopic glass shards from this eruption are also discovered on the south coast of South Africa,[27] in the lowlands of northwest Ethiopia,[28] in Lake Malawi,[29] and in Lake Chala.[30]
The most recent two high-precision argon–argon datings dated the eruption to 73,880 ± 320[31] and 73,700 ± 300 years ago.[32] Five distinct magma bodies were activated within a few centuries before the eruption.[33][34] The implied prevailing wind from the ash distribution is consistent with the eruption occurred during summer.[25] The eruption commenced with small and limited air-fall and was directly followed by the main phase of ignimbrite flows.[22] The ignimbrite phase is characterized by low eruption fountain,[35] but co-ignimbrite column developed on top of pyroclastic flows reached a height of 32 km (20 mi).[36] The entire eruption was likely continuous without major break and may have only lasted 9 to 14 days.[15] Petrological constrains on sulfur emission yielded a wide range from 1×1013 to 1×1015 g, depending on the existence of separate sulfur gas in the Toba magma chamber.[37][38] Ice core records estimate the sulfur emission on the order of 1×1014 g.[39]
Climate events around the time of eruption
Greenland stadial 20 (GS20) is a millennium-long cold event in the north Atlantic ocean that started around the time of Toba eruption.[40] The timing of the initiation of GS20 is dated to 74.0–74.2 kyr, and the entire event lasted about 1,500 years.[40][41] It is the stadial part of Dansgaard–Oeschger event 20 (DO20), commonly explained by an abrupt reduction in the strength of Atlantic Meridional Overturning Circulation (AMOC). Weaker AMOC caused warming in Southern Ocean and Antartica, and this asynchrony is known as bipolar seesaw.[42][43] The start of GS20 cooling event corresponds to the start of Antarctic Isotope Maxima 19 (AIM19) warming event.[44] GS20 was associated with iceberg discharges into the North Atlantic, thus it was also named Heinrich stadial 7a.[45] Heinrich events tend to be longer, colder and with weaker AMOC in the Atlantic ocean than other DO stadials.[42]
From 74 to 58 kyr, Earth transitioned from interglacial MIS 5 to glacial MIS 4, experiencing cooling and glacial expansion.[46][47] This transition is a part of Pleistocene interglacial-glacial cycle driven by variations in the earth's orbit.[48] Ocean temperature cooled by 0.9 °C (1.6 °F).[49] Sea level fell 60 m (200 ft).[50] Northern Hemisphere ice sheets embarked on significant expansion and surpassed the extent of Last Glacial Maximum in eastern Europe, Northeast Asia and the North American Cordillera.[51] Southern Hemisphere glaciation grew to its maximum extent during MIS 4.[52] Australasian region, Africa and Europe were characterized by increasingly cold and arid environment.[53][54][55]
Possible climate records of eruption
While Toba eruption occurred in the backdrop of rapid climate transitions of GS20 and MIS 4 triggered by changes in ocean currents and insolation,[56][40] whether the eruption played any role in accelerating these events is much more debated. South China Sea marine records of climate, sampled at every centennial interval, shows 1 °C (1.8 °F) cooling above Toba ash layer for a thousand year but the authors concede that it may just be GS20.[57] Arabian Sea marine records confirm that Toba ash occurred after the onset of GS20 but also that GS20 is not colder than GS21 in the records, from which authors conclude that the eruption did not intensify GS20 cooling.[58] Dense sampling of environmental records, at every 6–9 year interval, in Lake Malawi, show no cooling-induced change in lake ecology and in grassy woodlands after the deposition of Toba ash,[29][59] but cooling-forced aridity killed high elevation afromontane forests.[5] The Lake Malawi studies concluded that the environmental effects of the eruption were mild and limited to less than a decade in East Africa,[59] but these studies are questioned due to sediment mixing which would have diminished the cooling signal.[60] Environmental records from a Middle Stone Age site in Ethiopia, however, shows that a severe drought occurred concurrently with Toba ash layer which altered early human foraging behaviours.[28]
No Toba ash has been identified in ice core records, but four sulfate events within the ice strata have been proposed to possibly represent the deposition of aerosols from Toba eruption.[61][44][62] One sulfate event at 73.75–74.16 kyr, which has all the characteristics of the Toba eruption, is among the largest sulfate loadings that have ever been identified.[62] In the ice core records, GS20 cooling was already underway by the time of sulfate deposition, nonetheless a 110-year period of accelerated cooling followed the sulfate event, and the authors interpret this acceleration as AMOC weakened by the Toba eruption.[39]
Eruption climate modeling
The modeled climate effects of the Toba eruption hinges on the mass of sulfurous gases and aerosol microphysical processes. Modeling on an emission of 8.5×1014 g of sulfur, which is 100 times the 1991 Pinatubo sulphur, volcanic winter has a maximum global mean cooling of 3.5 °C (6.3 °F) and returns gradually within the range of natural variability 5 years after the eruption. An initiation of 1,000-year cold period or ice age is not supported by the model.[63][64] Two other emission scenarios, 1×1014 g and 1×1015 g, are investigated using state-of-art simulations provided by the Community Earth System Model. Maximum global mean cooling is 2.3 °C (4.1 °F) for the lower emission and 4.1 °C (7.4 °F) for the higher emission. Strong decrease in precipitation occurs in high emission. Negative temperature anomalies return to less than 1 °C (1.8 °F) within 3 and 6 years for each emission scenario after the eruption.[65] But so far no model can simulate aerosol microphysical processes with sufficient accuracy, empirical constraints from historical eruptions suggest that aerosol size may substantially reduce magnitude of cooling to less than 1.5 °C (2.7 °F) no matter how much sulfur emitted.[66]
Possible effects on Homo
At least two other Homo lineages, H. neanderthals, and Denisovans, survived the Toba eruption and subsequent MIS 4 ice age, as their latest presence are dated to ca. 40 kyr,[67] and ca. 55 kyr.[68] Other lineages including H. floresiensis,[69] H. luzonensis,[70] and Penghu 1[71] may had also survived through the eruption. More recently, reconstructions of human demographic history using whole-genome sequencing[72][73][74] and discoveries of archaeological cultures with Toba ash layer[75][27][28] add further light to how humans had fared during the eruption and the following GS20 and MIS 4 ice age.
Human demographic history
The Toba eruption has been associated with a genetic bottleneck in human evolution about 70,000 years ago;[76][77] it is hypothesized that the eruption resulted in a severe reduction in the size of the total human population due to the effects of the eruption on the global climate.[78] According to the genetic bottleneck theory, between 50,000 and 100,000 years ago, human populations decreased to 3,000–10,000 surviving individuals.[79][80] It is supported by some genetic evidence suggesting that modern humans are descended from a very small population of between 1,000 and 10,000 breeding pairs that existed about 70,000 years ago.[81][82]
Proponents of the genetic bottleneck theory (including Robock) suggest that the Toba eruption resulted in a global ecological disaster, including destruction of vegetation along with severe drought in the tropical rainforest belt and in monsoonal regions. A 10-year volcanic winter triggered by the eruption could have largely destroyed the food sources of humans and caused a severe reduction in population sizes.[83] These environmental changes may have generated population bottlenecks in many species, including hominids;[84] this in turn may have accelerated differentiation from within the smaller human population. Therefore, the genetic differences among modern humans may represent changes within the last 70,000 years, rather than gradual differentiation over hundreds of thousands of years.[85]
Additional caveats include difficulties in estimating the global and regional climatic effects of the eruption and lack of conclusive evidence for the eruption preceding the crash.[86] Furthermore, genetic analysis of Alu sequences across the entire human genome has shown that the effective human population size was less than 26,000 at 1.2 million years ago; possible explanations for the low population size of human ancestors may include repeated population crashes or periodic replacement events from competing Homo subspecies. (If these results are accurate, then, even before the emergence of Homo sapiens in Africa, Homo erectus population was unusually small when the species was spreading around the world.)[87]
The exact geographic distribution of anatomically modern human populations at the time of the eruption is not known, and surviving populations may have lived in Africa and subsequently migrated to other parts of the world. Analyses of mitochondrial DNA have estimated that the major migration from Africa occurred 60,000–70,000 years ago,[88] consistent with dating of the Toba eruption to about 75,000 years ago.[citation needed]
Archaeological studies
Other research has cast doubt on an association between the Toba Caldera Complex and a genetic bottleneck. For example, ancient stone tools at the Jurreru Valley in southern India were found above and below a thick layer of ash from the Toba eruption and were very similar across these layers, suggesting that the dust clouds from the eruption did not wipe out this local population.[89][90][91] However, another site in India, the Middle Son Valley, exhibits evidence of a major population decline and it has been suggested that the abundant springs of the Jurreru Valley may have offered its inhabitants unique protection.[92] Additional archaeological evidence from southern and northern India also suggests a lack of evidence for effects of the eruption on local populations, causing the authors of the study to conclude, "many forms of life survived the supereruption, contrary to other research which has suggested significant animal extinctions and genetic bottlenecks".[93] However, some researchers have questioned the techniques utilized to date artifacts to the period subsequent to the Toba supervolcano.[94] The Toba Catastrophe also coincides with the disappearance of the Skhul and Qafzeh hominins.[95] Evidence from pollen analysis has suggested prolonged deforestation in South Asia, and some researchers have suggested that the Toba eruption may have forced humans to adopt new adaptive strategies, which may have permitted them to replace Neanderthals and "other archaic human species".[96][97]
Genetic bottlenecks in other mammals
Some evidence indicates population crashes of other animals after the Toba eruption. The populations of the Eastern African chimpanzee,[98] Bornean orangutan,[99] central Indian macaque,[100] cheetah and tiger,[101] all expanded from very small populations around 70,000–55,000 years ago.
See also
- Early human migrations – Spread of humans from Africa through the world
- Most recent common ancestor – Most recent individual from which all organisms in a group are directly descended
- Quaternary extinction event – Extinctions of large mammals in the Late Pleistocene
- Recent African origin of modern humans – "Out of Africa" theory of the early migration of humans
- Timeline of volcanism on Earth
- Wallace Line – Line separating Asian and Australian fauna
Citations and notes
- ^ "Surprisingly, Humanity Survived the Super-volcano 74,000 Years Ago". Haaretz.
- ^ a b Ambrose 1998.
- ^ Michael R. Rampino, Stanley H. Ambrose, 2000. "Volcanic winter in the Garden of Eden: The Toba supereruption and the late Pleistocene human population crash", Volcanic Hazards and Disasters in Human Antiquity, Floyd W. McCoy, Grant Heiken
- ^ "Toba super-volcano catastrophe idea 'dismissed'". BBC News. 30 April 2013. Retrieved 2017-01-08.
- Choi, Charles Q. (2013-04-29). "Toba Supervolcano Not to Blame for Humanity's Near-Extinction". Livescience.com. Retrieved 2017-01-08.
- ^ a b Yost, Chad; et al. (March 2018). "Subdecadal phytolith and charcoal records from Lake Malawi, East Africa imply minimal effects on human evolution from the ~74 ka Toba supereruption". Journal of Human Evolution. 116. Elsevier: 75–94. doi:10.1016/j.jhevol.2017.11.005. PMID 29477183.
- ^ Ge, Yong; Gao, Xing (2020-09-10). "Understanding the overestimated impact of the Toba volcanic super-eruption on global environments and ancient hominins". Quaternary International. Current Research on Prehistoric Central Asia. 559: 24–33. Bibcode:2020QuInt.559...24G. doi:10.1016/j.quaint.2020.06.021. ISSN 1040-6182. S2CID 225418492.
- ^ Hawks, John (9 February 2018). "The so-called Toba bottleneck didn't happen". john hawks weblog.
- ^ Singh, Ajab; Srivastava, Ashok K. (2022-06-01). "Had Youngest Toba Tuff (YTT, ca. 75 ka) eruption really destroyed living media explicitly in entire Southeast Asia or just a theoretical debate? An extensive review of its catastrophic event". Journal of Asian Earth Sciences: X. 7: 100083. Bibcode:2022JAESX...700083S. doi:10.1016/j.jaesx.2022.100083. ISSN 2590-0560. S2CID 246416256.
- ^ Haigh, John; Smith, John Maynard (1972). "Population size and protein variation in man". Genetics Research. 19 (1): 73–89. doi:10.1017/S0016672300014282. ISSN 1469-5073.
- ^ Takahata, N. (1993). "Allelic genealogy and human evolution". Molecular Biology and Evolution. 10 (1): 2–22. doi:10.1093/oxfordjournals.molbev.a039995. ISSN 1537-1719. PMID 8450756.
- ^ Garesse, R (1988-04-01). "Drosophila melanogaster mitochondrial DNA: gene organization and evolutionary considerations". Genetics. 118 (4): 649–663. doi:10.1093/genetics/118.4.649. ISSN 1943-2631. PMC 1203320. PMID 3130291.
- ^ Harpending, Henry C.; Sherry, Stephen T.; Rogers, Alan R.; Stoneking, Mark (1993). "The Genetic Structure of Ancient Human Populations". Current Anthropology. 34 (4): 483–496. doi:10.1086/204195. ISSN 0011-3204.
- ^ Rogers, Alan R. (1995). "Genetic Evidence for a Pleistocene Population Explosion". Evolution. 49 (4): 608–615. doi:10.1111/j.1558-5646.1995.tb02297.x. PMID 28565146. S2CID 29309837.
- ^ Sherry, Stephen T.; Rogers, Alan R.; Harpending, Henry; Soodyall, Himla; Jenkins, Trefor; Stoneking, Mark (1994). "Mismatch Distributions of mtDNA Reveal Recent Human Population Expansions". Human Biology. 66 (5): 761–775. ISSN 0018-7143. JSTOR 41465014.
- ^ a b c Ninkovich, D.; Sparks, R. S. J.; Ledbetter, M. T. (1978-09-01). "The exceptional magnitude and intensity of the Toba eruption, sumatra: An example of the use of deep-sea tephra layers as a geological tool". Bulletin Volcanologique. 41 (3): 286–298. Bibcode:1978BVol...41..286N. doi:10.1007/BF02597228. ISSN 1432-0819. S2CID 128626019.
- ^ Rampino, Michael R.; Self, Stephen (1992-09-03). "Volcanic winter and accelerated glaciation following the Toba super-eruption". Nature. 359 (6390): 50–52. Bibcode:1992Natur.359...50R. doi:10.1038/359050a0. ISSN 1476-4687. S2CID 4322781.
- ^ Gibbons 1993.
- ^ Rampino, Michael R.; Self, Stephen (1993-12-24). "Bottleneck in Human Evolution and the Toba Eruption". Science. 262 (5142): 1955. Bibcode:1993Sci...262.1955R. doi:10.1126/science.8266085. ISSN 0036-8075. PMID 8266085.
- ^ a b Kutterolf, S.; Schindlbeck-Belo, J.C.; Müller, F.; Pank, K.; Lee, H.-Y.; Wang, K.-L.; Schmitt, A.K. (2023). "Revisiting the occurrence and distribution of Indian Ocean Tephra: Quaternary marine Toba ash inventory". Journal of Volcanology and Geothermal Research. 441: 107879. doi:10.1016/j.jvolgeores.2023.107879.
- ^ Self, S.; Gouramanis, C.; Storey, M. (2019-12-01). "The Young Toba Tuff (73.9 ka) Magma Body – True Size and the most Extensive and Voluminous Ignimbrite Yet Known?". AGU Fall Meeting Abstracts. 2019: V51H–0141. Bibcode:2019AGUFM.V51H0141S.
- ^ Chesner, Craig A.; Rose, William I. (1991-06-01). "Stratigraphy of the Toba Tuffs and the evolution of the Toba Caldera Complex, Sumatra, Indonesia". Bulletin of Volcanology. 53 (5): 343–356. doi:10.1007/BF00280226. ISSN 1432-0819.
- ^ a b Chesner, Craig A. (2012). "The Toba Caldera Complex". Quaternary International. 258: 5–18. doi:10.1016/j.quaint.2011.09.025. ISSN 1040-6182.
- ^ Petraglia, Michael D.; Ditchfield, Peter; Jones, Sacha; Korisettar, Ravi; Pal, J.N. (2012). "The Toba volcanic super-eruption, environmental change, and hominin occupation history in India over the last 140,000 years". Quaternary International. 258: 119–134. doi:10.1016/j.quaint.2011.07.042. ISSN 1040-6182.
- ^ Von Rad, Ulrich; Burgath, Klaus-Peter; Pervaz, Muhammad; Schulz, Hartmut (2002). "Discovery of the Toba Ash ( c. 70 ka) in a high-resolution core recovering millennial monsoonal variability off Pakistan". Geological Society, London, Special Publications. 195 (1): 445–461. doi:10.1144/GSL.SP.2002.195.01.25. ISSN 0305-8719.
- ^ a b Bühring, Christian; Sarnthein, Michael (2000). "Toba ash layers in the South China Sea: Evidence of contrasting wind directions during eruption ca. 74 ka: Comment and Reply". Geology. 28 (11): 1056. doi:10.1130/0091-7613(2000)28<1056:talits>2.0.co;2. ISSN 0091-7613.
- ^ Pattan, J. N; Shane, Phil; Banakar, V. K (1999-03-01). "New occurrence of Youngest Toba Tuff in abyssal sediments of the Central Indian Basin". Marine Geology. 155 (3): 243–248. doi:10.1016/S0025-3227(98)00160-1. ISSN 0025-3227.
- ^ a b Smith, Eugene I.; Jacobs, Zenobia; Johnsen, Racheal; Ren, Minghua; Fisher, Erich C.; Oestmo, Simen; Wilkins, Jayne; Harris, Jacob A.; Karkanas, Panagiotis; Fitch, Shelby; Ciravolo, Amber; Keenan, Deborah; Cleghorn, Naomi; Lane, Christine S.; Matthews, Thalassa (2018). "Humans thrived in South Africa through the Toba eruption about 74,000 years ago". Nature. 555 (7697): 511–515. doi:10.1038/nature25967. ISSN 1476-4687.
- ^ a b c Kappelman, John; Todd, Lawrence C.; Davis, Christopher A.; Cerling, Thure E.; Feseha, Mulugeta; Getahun, Abebe; Johnsen, Racheal; Kay, Marvin; Kocurek, Gary A.; Nachman, Brett A.; Negash, Agazi; Negash, Tewabe; O’Brien, Kaedan; Pante, Michael; Ren, Minghua (2024). "Adaptive foraging behaviours in the Horn of Africa during Toba supereruption". Nature. 628 (8007): 365–372. doi:10.1038/s41586-024-07208-3. ISSN 1476-4687. PMID 38509364.
- ^ a b Lane, C. S.; Chorn, B. T.; Johnson, T. C. (2013). "Ash from the Toba supereruption in Lake Malawi shows no volcanic winter in East Africa at 75 ka". Proceedings of the National Academy of Sciences. 110 (20): 8025–8029. Bibcode:2013PNAS..110.8025L. doi:10.1073/pnas.1301474110. PMC 3657767. PMID 23630269.
- ^ Baxter, A. J.; Verschuren, D.; Peterse, F.; Miralles, D. G.; Martin-Jones, C. M.; Maitituerdi, A.; Van der Meeren, T.; Van Daele, M.; Lane, C. S.; Haug, G. H.; Olago, D. O.; Sinninghe Damsté, J. S. (2023). "Reversed Holocene temperature–moisture relationship in the Horn of Africa". Nature. 620 (7973): 336–343. doi:10.1038/s41586-023-06272-5. hdl:1854/LU-01HF6GN7WZQ65R3C82NK0HC57E. ISSN 1476-4687. PMID 37558848.
- ^ Storey, Michael; Roberts, Richard G.; Saidin, Mokhtar (2012-11-13). "Astronomically calibrated 40 Ar/ 39 Ar age for the Toba supereruption and global synchronization of late Quaternary records". Proceedings of the National Academy of Sciences. 109 (46): 18684–18688. Bibcode:2012PNAS..10918684S. doi:10.1073/pnas.1208178109. ISSN 0027-8424. PMC 3503200. PMID 23112159.
- ^ Channell, J.E.T.; Hodell, D.A. (2017). "High-precision 40Ar/39Ar dating of Pleistocene tuffs and temporal anchoring of the Matuyama-Brunhes boundary". Quaternary Geochronology. 42: 56–59. doi:10.1016/j.quageo.2017.08.002. ISSN 1871-1014.
- ^ Pearce, Nicholas J.G.; Westgate, John A.; Gualda, Guilherme A.R.; Gatti, Emma; Muhammad, Ros F. (2019-10-14). "Tephra glass chemistry provides storage and discharge details of five magma reservoirs which fed the 75 ka Youngest Toba Tuff eruption, northern Sumatra". Journal of Quaternary Science. 35 (1–2): 256–271. doi:10.1002/jqs.3149. hdl:2160/dba3b012-8369-4dbb-8a89-1102f11e92c3. ISSN 0267-8179.
- ^ Lubbers, Jordan; Kent, Adam J. R.; de Silva, Shanaka (2024-01-18). "Constraining magma storage conditions of the Toba magmatic system: a plagioclase and amphibole perspective". Contributions to Mineralogy and Petrology. 179 (2). doi:10.1007/s00410-023-02089-7. ISSN 0010-7999.
- ^ CHESNER, C (1998-03-01). "Petrogenesis of the Toba Tuffs, Sumatra, Indonesia". Journal of Petrology. 39 (3): 397–438. doi:10.1093/petrology/39.3.397. ISSN 1460-2415.
- ^ Woods, Andrew W.; Wohletz, Kenneth (1991). "Dimensions and dynamics of co-ignimbrite eruption columns". Nature. 350 (6315): 225–227. doi:10.1038/350225a0. ISSN 1476-4687.
- ^ Chesner, Craig A.; Luhr, James F. (2010-11-30). "A melt inclusion study of the Toba Tuffs, Sumatra, Indonesia". Journal of Volcanology and Geothermal Research. 197 (1–4): 259–278. Bibcode:2010JVGR..197..259C. doi:10.1016/j.jvolgeores.2010.06.001.
- ^ Scaillet, Bruno; Luhr, James F.; Carroll, Michael R. (2003), "Petrological and volcanological constraints on volcanic sulfur emissions to the atmosphere", Volcanism and the Earth's Atmosphere, Geophysical Monograph Series, vol. 139, Washington, D. C.: American Geophysical Union, pp. 11–40, doi:10.1029/139gm02, ISBN 0-87590-998-1, retrieved 2024-04-25
- ^ a b Lin, Jiamei; Abbott, Peter M.; Sigl, Michael; Steffensen, Jørgen P.; Mulvaney, Robert; Severi, Mirko; Svensson, Anders (2023). "Bipolar ice-core records constrain possible dates and global radiative forcing following the ∼74 ka Toba eruption". Quaternary Science Reviews. 312: 108162. doi:10.1016/j.quascirev.2023.108162. ISSN 0277-3791.
- ^ a b c Polyak, Victor J.; Asmerom, Yemane; Lachniet, Matthew S. (2017-09-01). "Rapid speleothem δ13C change in southwestern North America coincident with Greenland stadial 20 and the Toba (Indonesia) supereruption". Geology. 45 (9): 843–846. doi:10.1130/G39149.1. ISSN 0091-7613.
- ^ Du, Wenjing; Cheng, Hai; Xu, Yao; Yang, Xunlin; Zhang, Pingzhong; Sha, Lijuan; Li, Hanying; Zhu, Xiaoyan; Zhang, Meiliang; Stríkis, Nicolás M.; Cruz, Francisco W.; Edwards, R. Lawrence; Zhang, Haiwei; Ning, Youfeng (2019). "Timing and structure of the weak Asian Monsoon event about 73,000 years ago". Quaternary Geochronology. 53: 101003. doi:10.1016/j.quageo.2019.05.002. ISSN 1871-1014.
- ^ a b Menviel, Laurie C.; Skinner, Luke C.; Tarasov, Lev; Tzedakis, Polychronis C. (2020). "An ice–climate oscillatory framework for Dansgaard–Oeschger cycles". Nature Reviews Earth & Environment. 1 (12): 677–693. doi:10.1038/s43017-020-00106-y. ISSN 2662-138X.
- ^ Anderson, H. J.; Pedro, J. B.; Bostock, H. C.; Chase, Z.; Noble, T. L. (2021-03-01). "Compiled Southern Ocean sea surface temperatures correlate with Antarctic Isotope Maxima". Quaternary Science Reviews. 255: 106821. doi:10.1016/j.quascirev.2021.106821. ISSN 0277-3791.
- ^ a b Svensson, A.; Bigler, M.; Blunier, T.; Clausen, H. B.; Dahl-Jensen, D.; Fischer, H.; Fujita, S.; Goto-Azuma, K.; Johnsen, S. J.; Kawamura, K.; Kipfstuhl, S.; Kohno, M.; Parrenin, F.; Popp, T.; Rasmussen, S. O. (2013-03-19). "Direct linking of Greenland and Antarctic ice cores at the Toba eruption (74 ka BP)". Climate of the Past. 9 (2): 749–766. Bibcode:2013CliPa...9..749S. doi:10.5194/cp-9-749-2013. hdl:2158/774798. ISSN 1814-9324. S2CID 17741316.
- ^ Davtian, Nina; Bard, Edouard (2023-03-13). "A new view on abrupt climate changes and the bipolar seesaw based on paleotemperatures from Iberian Margin sediments". Proceedings of the National Academy of Sciences. 120 (12). doi:10.1073/pnas.2209558120. ISSN 0027-8424.
- ^ Menking, James A.; Shackleton, Sarah A.; Bauska, Thomas K.; Buffen, Aron M.; Brook, Edward J.; Barker, Stephen; Severinghaus, Jeffrey P.; Dyonisius, Michael N.; Petrenko, Vasilii V. (2022-09-16). "Multiple carbon cycle mechanisms associated with the glaciation of Marine Isotope Stage 4". Nature Communications. 13 (1): 5443. doi:10.1038/s41467-022-33166-3. ISSN 2041-1723. PMC 9481522. PMID 36114188.
- ^ Doughty, Alice M.; Kaplan, Michael R.; Peltier, Carly; Barker, Stephen (2021). "A maximum in global glacier extent during MIS 4". Quaternary Science Reviews. 261: 106948. doi:10.1016/j.quascirev.2021.106948. ISSN 0277-3791.
- ^ Hays, J. D.; Imbrie, John; Shackleton, N. J. (1976-12-10). "Variations in the Earth's Orbit: Pacemaker of the Ice Ages: For 500,000 years, major climatic changes have followed variations in obliquity and precession". Science. 194 (4270): 1121–1132. doi:10.1126/science.194.4270.1121. ISSN 0036-8075. PMID 17790893.
- ^ Shackleton, Sarah; Menking, James A.; Brook, Edward; Buizert, Christo; Dyonisius, Michael N.; Petrenko, Vasilii V.; Baggenstos, Daniel; Severinghaus, Jeffrey P. (2021-10-27). "Evolution of mean ocean temperature in Marine Isotope Stage 4". Climate of the Past. 17 (5): 2273–2289. doi:10.5194/cp-17-2273-2021. ISSN 1814-9324.
- ^ Cutler, K.B; Edwards, R.L; Taylor, F.W; Cheng, H; Adkins, J; Gallup, C.D; Cutler, P.M; Burr, G.S; Bloom, A.L (2003). "Rapid sea-level fall and deep-ocean temperature change since the last interglacial period". Earth and Planetary Science Letters. 206 (3–4): 253–271. doi:10.1016/s0012-821x(02)01107-x. ISSN 0012-821X.
- ^ Batchelor, Christine L.; Margold, Martin; Krapp, Mario; Murton, Della K.; Dalton, April S.; Gibbard, Philip L.; Stokes, Chris R.; Murton, Julian B.; Manica, Andrea (2019-08-16). "The configuration of Northern Hemisphere ice sheets through the Quaternary". Nature Communications. 10 (1): 3713. doi:10.1038/s41467-019-11601-2. ISSN 2041-1723. PMC 6697730. PMID 31420542.
- ^ Schaefer, Joerg M.; Putnam, Aaron E.; Denton, George H.; Kaplan, Michael R.; Birkel, Sean; Doughty, Alice M.; Kelley, Sam; Barrell, David J.A.; Finkel, Robert C.; Winckler, Gisela; Anderson, Robert F.; Ninneman, Ulysses S.; Barker, Stephen; Schwartz, Roseanne; Andersen, Bjorn G. (2015). "The Southern Glacial Maximum 65,000 years ago and its Unfinished Termination". Quaternary Science Reviews. 114: 52–60. doi:10.1016/j.quascirev.2015.02.009.
- ^ Stewart, John R.; Fenberg, Phillip B. (2018-05-01). "A climatic context for the out-of-Africa migration: COMMENT". Geology. 46 (5): e442. doi:10.1130/g40057c.1. ISSN 0091-7613.
- ^ Helmens, Karin F. (2014). "The Last Interglacial–Glacial cycle (MIS 5–2) re-examined based on long proxy records from central and northern Europe". Quaternary Science Reviews. 86: 115–143. doi:10.1016/j.quascirev.2013.12.012. ISSN 0277-3791.
- ^ De Deckker, Patrick; Arnold, Lee J.; van der Kaars, Sander; Bayon, Germain; Stuut, Jan-Berend W.; Perner, Kerstin; Lopes dos Santos, Raquel; Uemura, Ryu; Demuro, Martina (2019). "Marine Isotope Stage 4 in Australasia: A full glacial culminating 65,000 years ago – Global connections and implications for human dispersal". Quaternary Science Reviews. 204: 187–207. doi:10.1016/j.quascirev.2018.11.017. ISSN 0277-3791.
- ^ Rampino, Michael R.; Self, Stephen (1992). "Volcanic winter and accelerated glaciation following the Toba super-eruption". Nature. 359 (6390): 50–52. doi:10.1038/359050a0. ISSN 1476-4687.
- ^ Huang, Chi-Yue; Zhao, Meixun; Wang, Chia-Chun; Wei, Ganjian (2001-10-15). "Cooling of the South China Sea by the Toba Eruption and correlation with other climate proxies ~71,000 years ago". Geophysical Research Letters. 28 (20): 3915–3918. Bibcode:2001GeoRL..28.3915H. doi:10.1029/2000GL006113. S2CID 128903263.
- ^ Schulz, Hartmut; Emeis, Kay-Christian; Erlenkeuser, Helmut; Rad, Ulrich von; Rolf, Christian (2002). "The Toba Volcanic Event and Interstadial/Stadial Climates at the Marine Isotopic Stage 5 to 4 Transition in the Northern Indian Ocean". Quaternary Research. 57 (1): 22–31. Bibcode:2002QuRes..57...22S. doi:10.1006/qres.2001.2291. ISSN 0033-5894. S2CID 129838182.
- ^ a b Jackson, Lily J.; Stone, Jeffery R.; Cohen, Andrew S.; Yost, Chad L. (2015-09-01). "High-resolution paleoecological records from Lake Malawi show no significant cooling associated with the Mount Toba supereruption at ca. 75 ka". Geology. 43 (9): 823–826. Bibcode:2015Geo....43..823J. doi:10.1130/G36917.1. ISSN 0091-7613.
- ^ Ambrose, S. H. (2019), "Chapter 6 chronological calibration of Late Pleistocene Modern Human dispersals, climate change and Archaeology with Geochemical Isochrons", in Sahle, Yonatan; Reyes-Centeno, Hugo; Bentz, Christian (eds.), Modern Human Origins and Dispersal, Kerns Verlag, pp. 171–213
- ^ Zielinski, G. A.; Mayewski, P. A.; Meeker, L. D.; Whitlow, S.; Twickler, M. S.; Taylor, K. (1996-04-15). "Potential atmospheric impact of the Toba Mega-Eruption ~71,000 years ago". Geophysical Research Letters. 23 (8): 837–840. Bibcode:1996GeoRL..23..837Z. doi:10.1029/96GL00706.
- ^ a b Crick, Laura; Burke, Andrea; Hutchison, William; Kohno, Mika; Moore, Kathryn A.; Savarino, Joel; Doyle, Emily A.; Mahony, Sue; Kipfstuhl, Sepp; Rae, James W. B.; Steele, Robert C. J.; Sparks, R. Stephen J.; Wolff, Eric W. (2021-10-18). "New insights into the ~ 74 ka Toba eruption from sulfur isotopes of polar ice cores". Climate of the Past. 17 (5): 2119–2137. Bibcode:2021CliPa..17.2119C. doi:10.5194/cp-17-2119-2021. hdl:10023/24161. ISSN 1814-9324. S2CID 239203480.
- ^ Timmreck, Claudia; Graf, Hans-F.; Zanchettin, Davide; Hagemann, Stefan; Kleinen, Thomas; Krüger, Kirstin (2012-05-01). "Climate response to the Toba super-eruption: Regional changes". Quaternary International. 258: 30–44. Bibcode:2012QuInt.258...30T. doi:10.1016/j.quaint.2011.10.008.
- ^ Timmreck, Claudia; Graf, Hans-F.; Lorenz, Stephan J.; Niemeier, Ulrike; Zanchettin, Davide; Matei, Daniela; Jungclaus, Johann H.; Crowley, Thomas J. (2010-12-22). "Aerosol size confines climate response to volcanic super-eruptions". Geophysical Research Letters. 37 (24): n/a. doi:10.1029/2010GL045464. hdl:11858/00-001M-0000-0011-F70C-7. S2CID 12790660.
- ^ Black, Benjamin A.; Lamarque, Jean-François; Marsh, Daniel R.; Schmidt, Anja; Bardeen, Charles G. (2021-07-20). "Global climate disruption and regional climate shelters after the Toba supereruption". Proceedings of the National Academy of Sciences. 118 (29): e2013046118. Bibcode:2021PNAS..11813046B. doi:10.1073/pnas.2013046118. ISSN 0027-8424. PMC 8307270. PMID 34230096.
- ^ McGraw, Zachary; DallaSanta, Kevin; Polvani, Lorenzo M.; Tsigaridis, Kostas; Orbe, Clara; Bauer, Susanne E. (2024-02-15). "Severe Global Cooling After Volcanic Super-Eruptions? The Answer Hinges on Unknown Aerosol Size". Journal of Climate. 37 (4): 1449–1464. doi:10.1175/jcli-d-23-0116.1. ISSN 0894-8755.
- ^ Higham, Tom; Douka, Katerina; Wood, Rachel; Ramsey, Christopher Bronk; Brock, Fiona; Basell, Laura; Camps, Marta; Arrizabalaga, Alvaro; Baena, Javier; Barroso-Ruíz, Cecillio; Bergman, Christopher; Boitard, Coralie; Boscato, Paolo; Caparrós, Miguel; Conard, Nicholas J. (2014). "The timing and spatiotemporal patterning of Neanderthal disappearance". Nature. 512 (7514): 306–309. doi:10.1038/nature13621. ISSN 1476-4687.
- ^ Jacobs, Zenobia; Li, Bo; Shunkov, Michael V.; Kozlikin, Maxim B.; Bolikhovskaya, Nataliya S.; Agadjanian, Alexander K.; Uliyanov, Vladimir A.; Vasiliev, Sergei K.; O’Gorman, Kieran; Derevianko, Anatoly P.; Roberts, Richard G. (2019). "Timing of archaic hominin occupation of Denisova Cave in southern Siberia". Nature. 565 (7741): 594–599. doi:10.1038/s41586-018-0843-2. ISSN 1476-4687.
- ^ Sutikna, Thomas; Tocheri, Matthew W.; Morwood, Michael J.; Saptomo, E. Wahyu; Jatmiko; Awe, Rokus Due; Wasisto, Sri; Westaway, Kira E.; Aubert, Maxime; Li, Bo; Zhao, Jian-xin; Storey, Michael; Alloway, Brent V.; Morley, Mike W.; Meijer, Hanneke J. M. (2016). "Revised stratigraphy and chronology for Homo floresiensis at Liang Bua in Indonesia". Nature. 532 (7599): 366–369. doi:10.1038/nature17179. ISSN 1476-4687.
- ^ Détroit, Florent; Mijares, Armand Salvador; Corny, Julien; Daver, Guillaume; Zanolli, Clément; Dizon, Eusebio; Robles, Emil; Grün, Rainer; Piper, Philip J. (2019). "A new species of Homo from the Late Pleistocene of the Philippines". Nature. 568 (7751): 181–186. doi:10.1038/s41586-019-1067-9. ISSN 1476-4687.
- ^ Chang, Chun-Hsiang; Kaifu, Yousuke; Takai, Masanaru; Kono, Reiko T.; Grün, Rainer; Matsu’ura, Shuji; Kinsley, Les; Lin, Liang-Kong (2015-01-27). "The first archaic Homo from Taiwan". Nature Communications. 6 (1): 6037. doi:10.1038/ncomms7037. hdl:1885/12938. ISSN 2041-1723.
- ^ Mallick, Swapan; Li, Heng; Lipson, Mark; Mathieson, Iain; Gymrek, Melissa; Racimo, Fernando; Zhao, Mengyao; Chennagiri, Niru; Nordenfelt, Susanne; Tandon, Arti; Skoglund, Pontus; Lazaridis, Iosif; Sankararaman, Sriram; Fu, Qiaomei; Rohland, Nadin (2016). "The Simons Genome Diversity Project: 300 genomes from 142 diverse populations". Nature. 538 (7624): 201–206. doi:10.1038/nature18964. hdl:11336/125570. ISSN 1476-4687.
- ^ A, Bergstrom; SA, McCarthy; R, Hui; MA, Almarri; Q, Ayub; P, Danecek; Y, Chen; S, Felkel; P, Hallast; J, Kamm; H, Blanche; JF, Deleuze; H, Cann; S, Mallick; D, Reich (2020-10-23). "Insights into human genetic variation and population history from 929 diverse genomes". Yearbook of Paediatric Endocrinology. doi:10.1530/ey.17.14.4. ISSN 1662-4009.
- ^ Fan, Shaohua; Spence, Jeffrey P.; Feng, Yuanqing; Hansen, Matthew E.B.; Terhorst, Jonathan; Beltrame, Marcia H.; Ranciaro, Alessia; Hirbo, Jibril; Beggs, William; Thomas, Neil; Nyambo, Thomas; Mpoloka, Sununguko Wata; Mokone, Gaonyadiwe George; Njamnshi, Alfred K.; Fokunang, Charles (2023). "Whole-genome sequencing reveals a complex African population demographic history and signatures of local adaptation". Cell. 186 (5): 923–939.e14. doi:10.1016/j.cell.2023.01.042. ISSN 0092-8674. PMC 10568978.
- ^ Petraglia, Michael; Korisettar, Ravi; Boivin, Nicole; Clarkson, Christopher; Ditchfield, Peter; Jones, Sacha; Koshy, Jinu; Lahr, Marta Mirazón; Oppenheimer, Clive; Pyle, David; Roberts, Richard; Schwenninger, Jean-Luc; Arnold, Lee; White, Kevin (2007-07-06). "Middle Paleolithic Assemblages from the Indian Subcontinent Before and After the Toba Super-Eruption". Science. 317 (5834): 114–116. doi:10.1126/science.1141564. ISSN 0036-8075.
- ^ Gibbons 1993, p. 27
- ^ Rampino & Self 1993a
- ^ Ambrose 1998, passim; Gibbons 1993, p. 27; McGuire 2007, pp. 127–128; Rampino & Ambrose 2000, pp. 78–80; Rampino & Self 1993b, pp. 1955.
- ^ Ambrose 1998; Rampino & Ambrose 2000, pp. 71, 80.
- ^ "Science & Nature – Horizon – Supervolcanoes". BBC.co.uk. Retrieved 2015-03-28.
- ^ "When humans faced extinction". BBC. 2003-06-09. Retrieved 2007-01-05.
- ^ M.R Rampino and S.Self, Nature 359, 50 (1992)
- ^ Robock & others 2009.
- ^ Rampino & Ambrose 2000, p. 80.
- ^ Ambrose 1998, pp. 623–651.
- ^ Oppenheimer 2002, pp. 1605, 1606.
- ^ See Huff & others 2010, p.6; Gibbons 2010.
- ^ "New 'Molecular Clock' Aids Dating Of Human Migration History". ScienceDaily. 22 June 2009. Retrieved 2009-06-30.
- ^ "Mount Toba Eruption – Ancient Humans Unscathed, Study Claims". Anthropology.net. 6 July 2007. Archived from the original on 2008-01-11. Retrieved 2008-04-20.
- ^ Sanderson, Katherine (July 2007). "Super-eruption: no problem?". Nature: news070702–15. doi:10.1038/news070702-15. S2CID 177216526. Archived from the original on December 7, 2008.
- ^ John Hawks (5 July 2007). "At last, the death of the Toba bottleneck". john hawks weblog.
- ^ Jones, Sacha. (2012). Local- and Regional-scale Impacts of the ~74 ka Toba Supervolcanic Eruption on Hominin Population and Habitats in India. Quaternary International 258: 100-118.
- ^ See also "Newly Discovered Archaeological Sites in India Reveals Ancient Life before Toba". Anthropology.net. 25 February 2010. Archived from the original on 22 July 2011. Retrieved 28 February 2010.
- ^ National Geographic- Did early humans in India survive a supervolcano?
- ^ Shea, John. (2008). Transitions or Turnovers? Climatically-forced Extinctions of Homo sapiens and Neanderthals in the East Mediterranean Levant. Quaternary Science Reviews 27: 2253-2270.
- ^ "Supervolcano Eruption In Sumatra Deforested India 73,000 Years ago". ScienceDaily. 24 November 2009.
- ^ Williams & others 2009.
- ^ Goldberg 1996
- ^ Steiper 2006
- ^ Hernandez & others 2007
- ^ Luo & others 2004
References
- Ambrose, Stanley H. (1998). "Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans". Journal of Human Evolution. 34 (6): 623–651. doi:10.1006/jhev.1998.0219. PMID 9650103.
- Chesner, C.A.; Westgate, J.A.; Rose, W.I.; Drake, R.; Deino, A. (March 1991). "Eruptive History of Earth's Largest Quaternary caldera (Toba, Indonesia) Clarified" (PDF). Geology. 19 (3): 200–203. Bibcode:1991Geo....19..200C. doi:10.1130/0091-7613(1991)019<0200:EHOESL>2.3.CO;2.
- Gibbons, Ann (1 October 1993). "Pleistocene Population Explosions". Science. 262 (5130): 27–28. Bibcode:1993Sci...262...27G. doi:10.1126/science.262.5130.27. PMID 17742951.
- Gibbons, Ann (19 January 2010). "Human Ancestors Were an Endangered Species". ScienceNow.
- Goldberg, T.L. (1996). "Genetics and biogeography of East African chimpanzees (Pan troglodytes schweinfurthii)" (PhD). Harvard University, unpublished.
- Hernandez, R.D.; Hubisz, M.J.; Wheeler, D.A.; Smith, D.G.; Ferguson, B.; et al. (2007). "Demographic histories and patterns of linkage disequilibrium in Chinese and Indian Rhesus macaques". Science. 316 (5822): 240–243. Bibcode:2007Sci...316..240H. doi:10.1126/science.1140462. PMID 17431170.
- Huff, Chad. D; Xing, Jinchuan; Rogers, Alan R.; Witherspoon, David; Jorde, Lynn B. (19 January 2010). "Mobile Elements Reveal Small Population Size in the Ancient Ancestors of Homo Sapiens". Proceedings of the National Academy of Sciences. 107 (5): 2147–2152. Bibcode:2010PNAS..107.2147H. doi:10.1073/pnas.0909000107. PMC 2836654. PMID 20133859.
- Jones, S. C. (2007). "The Toba Supervolcanic Eruption: Tephra-Fall Deposits in India and Paleoanthropological Implications". In Petraglia, M. D.; Allchin, B. (eds.). The Evolution and History of Human Populations in South Asia. Springer. pp. 173–200. ISBN 978-1-4020-5561-4.
- Luo, S.-J.; Kim, J.-H.; Johnson, W.E.; Van der Walt, J.; Martenson, J.; et al. (2004). "Phylogeography and genetic ancestry of tigers (Panthera tigris)". PLOS Biology. 2 (12): 2275–2293. doi:10.1371/journal.pbio.0020442. PMC 534810. PMID 15583716.
- Luo, Shu-Jin; Zhang, Yue; Johnson, Warren E.; Miao, Lin; Martelli, Paolo; et al. (2014). "Sympatric Asian felid phylogeography reveals a major Indochinese-Sundaic divergence". Molecular Ecology. 23 (8): 2072–2092. Bibcode:2014MolEc..23.2072L. doi:10.1111/mec.12716. ISSN 0962-1083. PMID 24629132. S2CID 40030155.
- McGuire, W.J. (2007). "The GGE Threat: Facing and Coping with Global Geophysical Events". In Bobrowsky, Peter T.; Rickman, Hans (eds.). Comet/Asteroid Impacts and Human Society: an Interdisciplinary Approach. Springer. pp. 123–141. Bibcode:2007caih.book.....B. ISBN 978-3-540-32709-7.
- Ninkovich, D.; N.J. Shackleton; A.A. Abdel-Monem; J.D. Obradovich; G. Izett (7 December 1978). "K−Ar age of the late Pleistocene eruption of Toba, north Sumatra". Nature. 276 (5688): 574–577. Bibcode:1978Natur.276..574N. doi:10.1038/276574a0. S2CID 4364788.
- Oppenheimer, Clive (August 2002), "Limited global change due to largest known Quaternary eruption, Toba ≈74 kyr BP?", Quaternary Science Reviews, 21 (14–15): 1593–1609, Bibcode:2002QSRv...21.1593O, doi:10.1016/S0277-3791(01)00154-8
- Petraglia, M.; Korisettar, R.; Boivin, N.; Clarkson, C.; Ditchfield, P.; et al. (6 July 2007). "Middle Paleolithic Assemblages from the Indian Subcontinent Before and After the Toba Super-eruption" (PDF). Science. 317 (5834): 114–116. Bibcode:2007Sci...317..114P. doi:10.1126/science.1141564. PMID 17615356. S2CID 20380351.
- Rampino, M. R.; Ambrose, S. H. (2000). "Volcanic winter in the Garden of Eden: The Toba supereruption and the late Pleistocene human population crash". In McCoy, F. W.; Heiken, G. (eds.). Volcanic Hazards and Disasters in Human Antiquity. Boulder, Colorado: Geological Society of America Special Paper 345. doi:10.1130/0-8137-2345-0.71. ISBN 0-8137-2345-0.
- Rampino, Michael R.; Self, Stephen (2 September 1992). "Volcanic Winter and Accelerated Glaciation following the Toba Super-eruption" (PDF). Nature. 359 (6390): 50–52. Bibcode:1992Natur.359...50R. doi:10.1038/359050a0. S2CID 4322781. Archived from the original (PDF) on 20 October 2011.
- Rampino, Michael R.; Self, Stephen (1993). "Climate–Volcanism Feedback and the Toba Eruption of ~74,000 Years ago" (PDF). Quaternary Research. 40 (3): 269–280. Bibcode:1993QuRes..40..269R. doi:10.1006/qres.1993.1081. S2CID 129546088. Archived from the original (PDF) on 2011-10-21.
- Rampino, Michael R.; Self, Stephen (24 December 1993). "Bottleneck in the Human Evolution and the Toba Eruption". Science. 262 (5142): 1955. Bibcode:1993Sci...262.1955R. doi:10.1126/science.8266085. PMID 8266085.
- Robock, A.; Ammann, C.M.; Oman, L.; Shindell, D.; Levis, S.; Stenchikov, G. (2009). "Did the Toba Volcanic Eruption of ~74k BP Produce Widespread Glaciation?". Journal of Geophysical Research. 114 (D10): D10107. Bibcode:2009JGRD..11410107R. doi:10.1029/2008JD011652.
- Rose, W.I.; Chesner, C.A. (October 1987). "Dispersal of Ash in the Great Toba Eruption, 75 ka" (PDF). Geology. 15 (10): 913–917. Bibcode:1987Geo....15..913R. doi:10.1130/0091-7613(1987)15<913:DOAITG>2.0.CO;2.
- Self, Stephen; Blake, Stephen (February 2008). "Consequences of Explosive Supereruptions". Elements. 4 (1): 41–46. Bibcode:2008Eleme...4...41S. doi:10.2113/GSELEMENTS.4.1.41.
- Steiper, M.E. (2006). "Population history, biogeography, and taxonomy of orangutans (Genus: Pongo) based on a population genetic meta-analysis of multiple loci". Journal of Human Evolution. 50 (5): 509–522. doi:10.1016/j.jhevol.2005.12.005. PMID 16472840.
- Thalman, O.; Fisher, A.; Lankester, F.; Pääbo, S.; Vigilant, L. (2007). "The complex history of gorillas: insights from genomic data". Molecular Biology and Evolution. 24: 146–158. doi:10.1093/molbev/msl160. PMID 17065595.
- Williams, Martin A.J.; Stanley H. Ambrose; Sander van der Kaars; Carsten Ruehlemann; Umesh Chattopadhyaya; Jagannath Pal; Parth R. Chauhan (30 December 2009). "Environmental impact of the 73 ka Toba super-eruption in South Asia". Palaeogeography, Palaeoclimatology, Palaeoecology. 284 (3–4). Elsevier: 295–314. Bibcode:2009PPP...284..295W. doi:10.1016/j.palaeo.2009.10.009.
- Zielinski, G.A.; Mayewski, P.A.; Meeker, L.D.; Whitlow, S.; Twickler, M.S.; Taylor, K. (1996). "Potential Atmospheric Impact of the Toba Mega-Eruption ~71,000 years ago" (PDF). Geophysical Research Letters. 23 (8): 837–840. Bibcode:1996GeoRL..23..837Z. doi:10.1029/96GL00706. Archived from the original (PDF) on July 18, 2011.
Further reading
- Prothero, Donald R. (2018). When Humans Nearly Vanished: The Catastrophic Explosion of the Toba Volcano. Washington: Smithsonian Books. ISBN 978-1588346353. OCLC 1020313538.
External links
- Population Bottlenecks and Volcanic Winter
- "Toba Volcano by George Weber". Archived from the original on April 22, 2011. Retrieved June 1, 2006.
- "The proper study of mankind" – Article in The Economist
- Homepage of Professor Stanley H. Ambrose, including bibliographic information on the two papers he has published on the Toba catastrophe theory
- Mount Toba: Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans by Professor Stanley H. Ambrose, Department of Anthropology, University Of Illinois, Urbana, USA; Extract from "Journal of Human Evolution" [1998] 34, 623–651
- Journey of Mankind by The Bradshaw Foundation – includes discussion on Toba eruption, DNA and human migrations
- Geography Predicts Human Genetic Diversity ScienceDaily (Mar. 17, 2005) – By analyzing the relationship between the geographic location of current human populations in relation to East Africa and the genetic variability within these populations, researchers have found new evidence for an African origin of modern humans.
- Out of Africa – Bacteria, As Well: Homo Sapiens And H. Pylori Jointly Spread Across The Globe ScienceDaily (Feb. 16, 2007) – When man made his way out of Africa some 60,000 years ago to populate the world, he was not alone: He was accompanied by the bacterium Helicobacter pylori...; illus. migration map.
- Magma 'Pancakes' May Have Fueled Toba Supervolcano
- Youtube video "Stone Age Apocalypse"