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Impact of Antarctic Meltwater Forcing on East Asian Climate Under Greenhouse Warming

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Title
Impact of Antarctic Meltwater Forcing on East Asian Climate Under Greenhouse Warming
Other Titles
지구온난화와 연관된 남극 용융수가 동아시아 기후에 미치는 영향
Authors
Oh, Ji­Hoon
Park, Wonsun
Lim, Hyung­Gyu
Noh, Kyung Min
Jin, Emilia Kyung
Kug, Jong­Seong
Subject
Geology
Keywords
Antarctic Meltwater; Southern Ocean; East Asia
Issue Date
2020-11
Citation
Oh, Ji­Hoon, et al. 2020. "Impact of Antarctic Meltwater Forcing on East Asian Climate Under Greenhouse Warming". GEOPHYSICAL RESEARCH LETTERS, 47(21): 1-10.
Abstract
In recent decades, Antarctic ice sheet/shelf melting has been accelerated, releasing freshwater into the Southern Ocean. It has been suggested that the meltwater flux could lead to cooling in the Southern Hemisphere, which would retard global warming and further induce a northward shift of the Intertropical Convergence Zone (ITCZ). In this study, we use experimental ensemble climate simulations to show that Antarctic meltwater forcing has distinct regional climate impacts over the globe, leading in particular to regional warming in East Asia, which offsets the global cooling effect by the meltwater forcing. It is suggested that Antarctic meltwater forcing leads to a negative precipitation anomaly in the Western North Pacific (WNP) via cooling in the tropics and the northward shift of the ITCZ. This suppressed convection in WNP induces an anticyclonic flow over the North Pacific, which leads to regional warming in East Asia. This hypothesis is supported by analyses of interensemble spread and long­term control simulations.
URI
https://repository.kopri.re.kr/handle/201206/11805
DOI
http://dx.doi.org/10.1029/2020GL089951
Appears in Collections  
2020-2020, Land-Ice/Ocean Network Exploration with Semiautonomous Systems: Thwaites Glacier (LIONESS/TG) - Toward understanding the fate of the Thwaites Glacier by abrupt collapse and its impact on global sea level changes - (20-20) / Lee, Won Sang (PM20020)
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