Reduced El Niño-Southern Oscillation during the Last Glacial Maximum.
El Niño-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial...
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Online Access: | http://qmro.qmul.ac.uk/xmlui/handle/123456789/48545 https://doi.org/10.1126/science.1258437 |
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ftqueenmaryuniv:oai:qmro.qmul.ac.uk:123456789/48545 2023-05-15T16:40:44+02:00 Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. Ford, HL Ravelo, AC Polissar, PJ 2018-10-15T11:04:15.587Z 255 - 258 http://qmro.qmul.ac.uk/xmlui/handle/123456789/48545 https://doi.org/10.1126/science.1258437 eng en eng Science http://qmro.qmul.ac.uk/xmlui/handle/123456789/48545 doi:10.1126/science.1258437 © 2015, American Association for the Advancement of Science Article 2018 ftqueenmaryuniv https://doi.org/10.1126/science.1258437 2022-09-25T20:17:42Z El Niño-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial pressure of CO2) were different from those today. In this work, we reconstruct LGM temperature variability at equatorial Pacific sites using measurements of individual planktonic foraminifera shells. A deep equatorial thermocline altered the dynamics in the eastern equatorial cold tongue, resulting in reduced ENSO variability during the LGM compared to the Late Holocene. These results suggest that ENSO was not tied directly to the east-west temperature gradient, as previously suggested. Rather, the thermocline of the eastern equatorial Pacific played a decisive role in the ENSO response to LGM climate. Article in Journal/Newspaper Ice Sheet Planktonic foraminifera Queen Mary University of London: Queen Mary Research Online (QMRO) Pacific Science 347 6219 255 258 |
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Open Polar |
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Queen Mary University of London: Queen Mary Research Online (QMRO) |
op_collection_id |
ftqueenmaryuniv |
language |
English |
description |
El Niño-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial pressure of CO2) were different from those today. In this work, we reconstruct LGM temperature variability at equatorial Pacific sites using measurements of individual planktonic foraminifera shells. A deep equatorial thermocline altered the dynamics in the eastern equatorial cold tongue, resulting in reduced ENSO variability during the LGM compared to the Late Holocene. These results suggest that ENSO was not tied directly to the east-west temperature gradient, as previously suggested. Rather, the thermocline of the eastern equatorial Pacific played a decisive role in the ENSO response to LGM climate. |
format |
Article in Journal/Newspaper |
author |
Ford, HL Ravelo, AC Polissar, PJ |
spellingShingle |
Ford, HL Ravelo, AC Polissar, PJ Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. |
author_facet |
Ford, HL Ravelo, AC Polissar, PJ |
author_sort |
Ford, HL |
title |
Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. |
title_short |
Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. |
title_full |
Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. |
title_fullStr |
Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. |
title_full_unstemmed |
Reduced El Niño-Southern Oscillation during the Last Glacial Maximum. |
title_sort |
reduced el niño-southern oscillation during the last glacial maximum. |
publishDate |
2018 |
url |
http://qmro.qmul.ac.uk/xmlui/handle/123456789/48545 https://doi.org/10.1126/science.1258437 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet Planktonic foraminifera |
genre_facet |
Ice Sheet Planktonic foraminifera |
op_relation |
Science http://qmro.qmul.ac.uk/xmlui/handle/123456789/48545 doi:10.1126/science.1258437 |
op_rights |
© 2015, American Association for the Advancement of Science |
op_doi |
https://doi.org/10.1126/science.1258437 |
container_title |
Science |
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347 |
container_issue |
6219 |
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255 |
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258 |
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1766031155375636480 |