East Antarctic cooling induced by decadal changes in Madden-Julian oscillation during austral summer
- 주제(기타) Multidisciplinary Sciences
- 설명문(일반) [Hsu, Pang-Chi; Fu, Zhen; Liu, Yu] Nanjing Univ Informat Sci & Technol, Minist Educ, Key Lab Meteorol Disaster, Nanjing, Peoples R China; [Murakami, Hiroyuki; Johnson, Nathaniel C.] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ USA; [Murakami, Hiroyuki] Univ Corp Atmospher Res, Boulder, CO USA; [Lee, June-Yi] Pusan Natl Univ, Res Ctr Climate Sci, Busan, South Korea; [Lee, June-Yi] Inst Basic Sci, Ctr Climate Phys, Busan, South Korea; [Yoo, Changhyun] Ewha Womans Univ, Dept Climate & Energy Syst Engn, Seoul, South Korea; [Chang, Chueh-Hsin] Ewha Womans Univ, Ctr Climate Environm Change Predict Res, Seoul, South Korea; [Chang, Chueh-Hsin] Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan; [Liu, Yu] Hainan Meteorol Observ, Haikou, Hainan, Peoples R China; [Liu, Yu] Key Lab South China Sea Meteorol Disaster Prevent, Haikou, Hainan, Peoples R China
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 AMER ASSOC ADVANCEMENT SCIENCE
- 발행년도 2021
- URI http://www.dcollection.net/handler/ewha/000000182204
- 본문언어 영어
- Published As http://dx.doi.org/10.1126/sciadv.abf9903
초록/요약
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.
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