Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum
Stable oxygen isotope records from central Greenland suggest disproportionally large long‐term surface air temperature (SAT) variability during the Last Glacial Maximum (LGM) relative to preindustrial times. Large perturbations in mean atmospheric circulation and its variability forced by extensive...
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ftdatacite:10.23689/fidgeo-4425 2023-05-15T16:23:28+02:00 Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum Song, Zhaoyang Latif, Mojib Park, Wonsun Zhang, Yuming 2020 https://dx.doi.org/10.23689/fidgeo-4425 https://e-docs.geo-leo.de/handle/11858/8771 en eng FID GEO Text Article article-journal ScholarlyArticle 2020 ftdatacite https://doi.org/10.23689/fidgeo-4425 2021-11-05T12:55:41Z Stable oxygen isotope records from central Greenland suggest disproportionally large long‐term surface air temperature (SAT) variability during the Last Glacial Maximum (LGM) relative to preindustrial times. Large perturbations in mean atmospheric circulation and its variability forced by extensive Northern Hemisphere ice sheet coverage have been suggested as cause for the enhanced Greenland SAT variability. Here, we assess the factors driving Greenland SAT variability during the LGM by means of dedicated climate model simulations and find remote forcing from the Pacific of critical importance. Atmospheric teleconnections from the Interdecadal Pacific Oscillation (IPO), a multidecadal oscillation of sea surface temperature in the Pacific Ocean, strongly intensify under LGM conditions, driving enhanced surface wind variability over Greenland, which in turn amplifies SAT variability by anomalous atmospheric heat transport. A major role of the IPO in forcing Greenland SAT variability also is supported by a number of models from the Paleoclimate Modeling Intercomparison Project Phase III. : Plain Language Summary: Stable oxygen isotope records, a proxy for the local surface air temperature (SAT), from central Greenland indicate disproportionally large reductions in the multidecadal variability from the Last Ice Age (Last Glacial Maximum, LGM; about 21,000 years before present) to modern times. A climate model simulates the changes in multidecadal Greenland SAT variability as inferred from the proxy data. The enhanced variability during the LGM is largely remotely driven by the Interdecadal Pacific Oscillation (IPO), a multidecadal oscillation of sea surface temperature (SST) in the Pacific Ocean. Atmospheric teleconnections from the IPO strongly intensify under glacial conditions, driving enhanced surface wind variability over Greenland and through atmospheric heat transport the SAT variability. : Key Points: Oxygen isotope records and climate modeling show large reductions in Greenland surface temperature variability from the LGM to modern times Atmospheric teleconnections from the Interdecadal Pacific Oscillation intensify under glacial conditions Greenland surface temperature is forced by atmospheric heat transport and sea ice linked to the Interdecadal Pacific Oscillation Text Greenland Ice Sheet Sea ice DataCite Metadata Store (German National Library of Science and Technology) Greenland Pacific |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
Stable oxygen isotope records from central Greenland suggest disproportionally large long‐term surface air temperature (SAT) variability during the Last Glacial Maximum (LGM) relative to preindustrial times. Large perturbations in mean atmospheric circulation and its variability forced by extensive Northern Hemisphere ice sheet coverage have been suggested as cause for the enhanced Greenland SAT variability. Here, we assess the factors driving Greenland SAT variability during the LGM by means of dedicated climate model simulations and find remote forcing from the Pacific of critical importance. Atmospheric teleconnections from the Interdecadal Pacific Oscillation (IPO), a multidecadal oscillation of sea surface temperature in the Pacific Ocean, strongly intensify under LGM conditions, driving enhanced surface wind variability over Greenland, which in turn amplifies SAT variability by anomalous atmospheric heat transport. A major role of the IPO in forcing Greenland SAT variability also is supported by a number of models from the Paleoclimate Modeling Intercomparison Project Phase III. : Plain Language Summary: Stable oxygen isotope records, a proxy for the local surface air temperature (SAT), from central Greenland indicate disproportionally large reductions in the multidecadal variability from the Last Ice Age (Last Glacial Maximum, LGM; about 21,000 years before present) to modern times. A climate model simulates the changes in multidecadal Greenland SAT variability as inferred from the proxy data. The enhanced variability during the LGM is largely remotely driven by the Interdecadal Pacific Oscillation (IPO), a multidecadal oscillation of sea surface temperature (SST) in the Pacific Ocean. Atmospheric teleconnections from the IPO strongly intensify under glacial conditions, driving enhanced surface wind variability over Greenland and through atmospheric heat transport the SAT variability. : Key Points: Oxygen isotope records and climate modeling show large reductions in Greenland surface temperature variability from the LGM to modern times Atmospheric teleconnections from the Interdecadal Pacific Oscillation intensify under glacial conditions Greenland surface temperature is forced by atmospheric heat transport and sea ice linked to the Interdecadal Pacific Oscillation |
format |
Text |
author |
Song, Zhaoyang Latif, Mojib Park, Wonsun Zhang, Yuming |
spellingShingle |
Song, Zhaoyang Latif, Mojib Park, Wonsun Zhang, Yuming Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum |
author_facet |
Song, Zhaoyang Latif, Mojib Park, Wonsun Zhang, Yuming |
author_sort |
Song, Zhaoyang |
title |
Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum |
title_short |
Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum |
title_full |
Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum |
title_fullStr |
Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum |
title_full_unstemmed |
Interdecadal Pacific Oscillation Drives Enhanced Greenland Surface Temperature Variability During the Last Glacial Maximum |
title_sort |
interdecadal pacific oscillation drives enhanced greenland surface temperature variability during the last glacial maximum |
publisher |
FID GEO |
publishDate |
2020 |
url |
https://dx.doi.org/10.23689/fidgeo-4425 https://e-docs.geo-leo.de/handle/11858/8771 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland Ice Sheet Sea ice |
genre_facet |
Greenland Ice Sheet Sea ice |
op_doi |
https://doi.org/10.23689/fidgeo-4425 |
_version_ |
1766011720589901824 |