East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer
While West Antarctica has experienced the most significant warming in the world, a profound cooling trend in austral summer was observed over East Antarctica (30 degrees W to 150 degrees E, 70 degrees to 90 degrees S) from 1979 to 2014. Previous studies attributed these changes to high-latitude atmo...
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ftncar:oai:drupal-site.org:articles_24530 2024-04-28T08:01:35+00:00 East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer Hsu, Pang-Chi (author) Fu, Zhen (author) Murakami, Hiroyuki (author) Lee, June-Yi (author) Yoo, Changhyun (author) Johnson, Nathaniel C. (author) Chang, Chueh-Hsin (author) Liu, Yu (author) 2021-06-23 https://doi.org/10.1126/sciadv.abf9903 en eng Science Advances--Sci. Adv.--2375-2548 articles:24530 doi:10.1126/sciadv.abf9903 ark:/85065/d7th8qvp Copyright 2021 American Association for the Advancement of Science. article Text 2021 ftncar https://doi.org/10.1126/sciadv.abf9903 2024-04-04T17:34:52Z While West Antarctica has experienced the most significant warming in the world, a profound cooling trend in austral summer was observed over East Antarctica (30 degrees W to 150 degrees E, 70 degrees to 90 degrees S) from 1979 to 2014. Previous studies attributed these changes to high-latitude atmospheric dynamics, stratospheric ozone change, and tropical sea surface temperature anomalies. We show that up to 20 to 40% of the observed summer cooling trend in East Antarctica was forced by decadal changes of the Madden-Julian oscillation (MJO). Both observational analysis and climate model experiments indicate that the decadal changes in the MJO, characterized by less (more) atmospheric deep convection in the Indian Ocean (western Pacific) during the recent two decades, led to the net cooling trend over East Antarctica through modifying atmospheric circulations linked to poleward-propagating Rossby wave trains. This study highlights that changes in intraseasonal tropical climate patterns may result in important climate change over Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica West Antarctica OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Science Advances 7 26 eabf9903 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
While West Antarctica has experienced the most significant warming in the world, a profound cooling trend in austral summer was observed over East Antarctica (30 degrees W to 150 degrees E, 70 degrees to 90 degrees S) from 1979 to 2014. Previous studies attributed these changes to high-latitude atmospheric dynamics, stratospheric ozone change, and tropical sea surface temperature anomalies. We show that up to 20 to 40% of the observed summer cooling trend in East Antarctica was forced by decadal changes of the Madden-Julian oscillation (MJO). Both observational analysis and climate model experiments indicate that the decadal changes in the MJO, characterized by less (more) atmospheric deep convection in the Indian Ocean (western Pacific) during the recent two decades, led to the net cooling trend over East Antarctica through modifying atmospheric circulations linked to poleward-propagating Rossby wave trains. This study highlights that changes in intraseasonal tropical climate patterns may result in important climate change over Antarctica. |
author2 |
Hsu, Pang-Chi (author) Fu, Zhen (author) Murakami, Hiroyuki (author) Lee, June-Yi (author) Yoo, Changhyun (author) Johnson, Nathaniel C. (author) Chang, Chueh-Hsin (author) Liu, Yu (author) |
format |
Article in Journal/Newspaper |
title |
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer |
spellingShingle |
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer |
title_short |
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer |
title_full |
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer |
title_fullStr |
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer |
title_full_unstemmed |
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer |
title_sort |
east antarctic cooling induced by decadal changes in madden-julian oscillation during austral summer |
publishDate |
2021 |
url |
https://doi.org/10.1126/sciadv.abf9903 |
genre |
Antarc* Antarctic Antarctica East Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica West Antarctica |
op_relation |
Science Advances--Sci. Adv.--2375-2548 articles:24530 doi:10.1126/sciadv.abf9903 ark:/85065/d7th8qvp |
op_rights |
Copyright 2021 American Association for the Advancement of Science. |
op_doi |
https://doi.org/10.1126/sciadv.abf9903 |
container_title |
Science Advances |
container_volume |
7 |
container_issue |
26 |
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eabf9903 |
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1797573263011872768 |