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East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer

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Title
East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer
Author(s)
Hsu, Pang-Chi; Fu, Zhen; Murakami, Hiroyuki; June-Yi Lee; Yoo, Changhyun; Johnson, Nathaniel C.; Chang, Chueh-Hsin; Liu, Yu
Subject
CLIMATE-CHANGE, ; SURFACE, ; MJO, ; PROJECT
Publication Date
2021-06
Journal
SCIENCE ADVANCES, v.7, no.26
Publisher
American Association for the Advancement of Science
Abstract
Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science.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°W to 150°E, 70° to 90°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.
URI
https://pr.ibs.re.kr/handle/8788114/9935
DOI
10.1126/sciadv.abf9903
ISSN
2375-2548
Appears in Collections:
Center for Climate Physics(기후물리 연구단) > 1. Journal Papers (저널논문)
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