期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 18, 页码 9449-9457出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL074972
关键词
global warming; heat uptake; teleconnection
资金
- Ministry of Science and Technology of Taiwan [103-2111-M-002-013, 104-2111-M-002005, 105-2628-M-002-009-MY4]
- U.S. National Science Foundation [637450]
- National Reseach Foundation of Korea [2016R1A1A3A04005520]
- NSF
- National Science Foundation
- National Research Foundation of Korea [2016R1A1A3A04005520] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Under increasing greenhouse gas forcing, climate models project tropical warming that is greater in the Northern than the Southern Hemisphere, accompanied by a reduction in the northeast trade winds and a strengthening of the southeast trades. While the ocean-atmosphere coupling indicates a positive feedback, what triggers the coupled asymmetry and favors greater warming in the northern tropics remains unclear. Far away from the tropics, the Southern Ocean (SO) has been identified as the major region of ocean heat uptake. Beyond its local effect on the magnitude of sea surface warming, we show by idealized modeling experiments in a coupled slab ocean configuration that enhanced SO heat uptake has a profound global impact. This SO-to-tropics connection is consistent with southward atmospheric energy transport across the equator. Enhanced SO heat uptake results in a zonally asymmetric La-Nina-like pattern of sea surface temperature change that not only affects tropical precipitation but also has influences on the Asian and North American monsoons.
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