Marine Atmospheric Boundary Layers Associated with Summer Monsoon Onset over the South China Sea in 1998

作     者：WANG Dong-Xiao ZHOU Wen YU Xiao-Li XIE Qiang WANG Xin 

作者机构：Key Laboratory of Tropical Marine Environmental Dynamics＇ South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Guy Carpenter Asia-Pacific Climate Impact Centre School of Energy and Environment City University ofHong Kong Hong Kong China Weifang Marine andEnvironment Monitor Center Weifang 261401 China 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2010年第3卷第5期

页      面：263-270页

学科分类：0710[理学-生物学] 07[理学] 070601[理学-气象学] 0706[理学-大气科学] 071002[理学-动物学] 

基　　金：supported by the Chinese Academy of Sciences (Grant No. KZCX1-YW-12-01) the National Natural Science Foundation of China (Grant Nos. U0733002 and 40876009) The National Basic Research Program of China (Grant No. 2011CB403504) 

主　　题：monsoon onset marine atmospheric boundary layer height atmosphere internal dynamics SST 

摘      要：The variations of the marine atmospheric boundary layer (MABL) associated with the South China Sea Summer Monsoon were examined using the Global Positioning System (GPS) sounding datasets obtained four times daily during May-June 1998 on board Research Vessels Kexue 1 and Shiyan 3. The MABL height is defined as the height at the lowest level where virtual potential temperature increases by 1 K from the surface. The results indicate that the MABL height decreased over the northern South China Sea (SCS) and remained the same over the southern SCS, as sea surface temperature (SST) fell for the northern and rose for the southern SCS after the monsoon onset. Over the northern SCS, a decrease in both the SST and the surface latent-heat flux after the onset resulted in a reduction of the MABL height as well as a decoupling of MABL from clouds. It was found that MABL height reduction corresponded to rainfall occurrence. Over the southern SCS, a probable reason for the constant increase of SST and surface heat flux was the rainfall and internal atmospheric dynamics.