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Response of the Asian summer monsoon to a weakening of Atlantic thermohaline circulation

Lu, R. and Dong, B. ORCID: (2008) Response of the Asian summer monsoon to a weakening of Atlantic thermohaline circulation. Advances in Atmospheric Sciences, 25 (5). pp. 723-736. ISSN 0256-1530

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To link to this item DOI: 10.1007/s00376-008-0723-z


Various paleoclimate records have shown that the Asian monsoon was punctuated by numerous suborbital time-scale events, and these events were coeval with those that happened in the North Atlantic. This study investigates the Asian summer monsoon responses to the Atlantic Ocean forcing by applying an additional freshwater flux into the North Atlantic. The simulated results indicate that the cold North Atlantic and warm South Atlantic induced by the weakened Atlantic thermohaline circulation (THC) due to the freshwater flux lead to significantly suppressed Asian summer monsoon. The authors analyzed the detailed processes of the Atlantic Ocean forcing on the Asian summer monsoon, and found that the atmospheric teleconnection in the eastern and central North Pacific and the atmosphere-ocean interaction in the tropical North Pacific play the most crucial role. Enhanced precipitation in the subtropical North Pacific extends the effects of Atlantic Ocean forcing from the eastern Pacific into the western Pacific, and the atmosphere-ocean interaction in the tropical Pacific and Indian Ocean intensifies the circulation and precipitation anomalies in the Pacific and East Asia.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:1254
Uncontrolled Keywords:Asian summer monsoon; Atlantic thermohaline circulation; dynamical process
Publisher:Science Press, co-published with Springer-Verlag Gmb

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