Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years
Interdecadal Pacific Oscillation (IPO) and the Atlantic Multidecadal Oscillation (AMO) has been found to be important to the Amundsen Sea Low (ASL) and zonally asymmetric changes in Antarctic surface air temperature that cannot be explained by anthropogenic forcing. However, most studies focus only...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5020564 2023-07-23T04:13:21+02:00 Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years Sui, C. Yu, L. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020564 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3165 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020564 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-3165 2023-07-02T23:40:09Z Interdecadal Pacific Oscillation (IPO) and the Atlantic Multidecadal Oscillation (AMO) has been found to be important to the Amundsen Sea Low (ASL) and zonally asymmetric changes in Antarctic surface air temperature that cannot be explained by anthropogenic forcing. However, most studies focus only on the joint impact of the opposite phase of AMO and IPO which prevailed during the satellite era since 1979. In this study, we utilize long-term reanalysis data to examine the effect of the four combinations of +AMO+IPO, -AMO-IPO, +AMO-IPO, and -AMO+IPO on the Antarctic surface air temperature during the past more than 100 years. During the period of +AMO+IPO and +AMO-IPO, Antarctic SAT shows an opposite distribution. And during the period of -AMO+IPO, with the exception of the Antarctic Peninsula and near the Weddell Sea, the Antarctic region as a whole is warming. The strongest signal of the SAT anomalies is for the season of austral autumn (AMJ), while the smallest magnitude compared with the other three phases is for the -AMO and -IPO. The wavetrain excited by the SST anomalies associated with IPO and AMO induces upper-level and surface atmospheric circulation anomalies, that change the SAT distribution. Also, downward longwave radiation anomalies related to the anomalous cloud cover plays a role. Conference Object Amundsen Sea Antarc* Antarctic Antarctic Peninsula Weddell Sea GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Amundsen Sea Antarctic Antarctic Peninsula Austral Pacific The Antarctic Weddell Weddell Sea |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Interdecadal Pacific Oscillation (IPO) and the Atlantic Multidecadal Oscillation (AMO) has been found to be important to the Amundsen Sea Low (ASL) and zonally asymmetric changes in Antarctic surface air temperature that cannot be explained by anthropogenic forcing. However, most studies focus only on the joint impact of the opposite phase of AMO and IPO which prevailed during the satellite era since 1979. In this study, we utilize long-term reanalysis data to examine the effect of the four combinations of +AMO+IPO, -AMO-IPO, +AMO-IPO, and -AMO+IPO on the Antarctic surface air temperature during the past more than 100 years. During the period of +AMO+IPO and +AMO-IPO, Antarctic SAT shows an opposite distribution. And during the period of -AMO+IPO, with the exception of the Antarctic Peninsula and near the Weddell Sea, the Antarctic region as a whole is warming. The strongest signal of the SAT anomalies is for the season of austral autumn (AMJ), while the smallest magnitude compared with the other three phases is for the -AMO and -IPO. The wavetrain excited by the SST anomalies associated with IPO and AMO induces upper-level and surface atmospheric circulation anomalies, that change the SAT distribution. Also, downward longwave radiation anomalies related to the anomalous cloud cover plays a role. |
format |
Conference Object |
author |
Sui, C. Yu, L. |
spellingShingle |
Sui, C. Yu, L. Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years |
author_facet |
Sui, C. Yu, L. |
author_sort |
Sui, C. |
title |
Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years |
title_short |
Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years |
title_full |
Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years |
title_fullStr |
Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years |
title_full_unstemmed |
Influence of the Interdecadal Pacific Oscillation and Atlantic Multidecadal Oscillation on Antarctic surface air temperature in the past 100 years |
title_sort |
influence of the interdecadal pacific oscillation and atlantic multidecadal oscillation on antarctic surface air temperature in the past 100 years |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020564 |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Austral Pacific The Antarctic Weddell Weddell Sea |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Austral Pacific The Antarctic Weddell Weddell Sea |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Weddell Sea |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-3165 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020564 |
op_doi |
https://doi.org/10.57757/IUGG23-3165 |
_version_ |
1772178197730820096 |