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http://dx.doi.org/10.14191/Atmos.2013.23.3.283

Analysis of Atmosphere-Ocean Interactions over South China Sea and its Relationship with Northeast Asian Precipitation Variability during Summer  

Jang, Hye-Yeong (Department of Marine Sciences and Convergent Technology, Hanyang University, ERICA)
Yeh, Sang-Wook (Department of Marine Sciences and Convergent Technology, Hanyang University, ERICA)
Publication Information
Atmosphere / v.23, no.3, 2013 , pp. 283-291 More about this Journal
Abstract
This study investigates the changes in the atmosphere-ocean interactions over the South China Sea (SCS) by analyzing their variables in the period of 1979~2011 during the boreal summer (June-July-August). It is found that a simultaneous correlation coefficient between sea surface temperature (SST) and precipitation over SCS during summer is significantly changed before and after the late-1990s. That is, the variation of precipitation over SCS is negatively (positively) correlated with the SST variations before (after) the late-1990s. Our further correlation analysis indicates that the atmospheric forcing of the SST is dominant before the late-1990s accompanying with wind-evaporation feedback and cloud-radiation feedback. After the late-1990s, in contrast, the SST forcing of the atmosphere through the latent heat flux from the ocean to the atmosphere is dominant. It is found that the change in the relationship of atmosphere-ocean interactions over SCS are associated with the changes in the relationship with Northeast Asian summer precipitation. In particular, a simultaneous correlation coefficient between the precipitation over SCS and Northeast Asia becomes stronger during after the late-1990s than before the late-1990s. We argue that the increase of the SST forcing of the atmosphere over SCS may lead a direct relationship of precipitation variations between SCS and Northeast Asia after the late-1990s.
Keywords
South China Sea; atmosphere-ocean interaction; Northeast Asian summer precipitation; Atmospheric forcing; SST forcing;
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