| 1998年南海夏季风爆发前后的海洋上空大气边界层 |
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| 作者姓名： | WANG Dong-Xiao ZHOU Wen YU Xiao-Li XIE Qiang WANG Xin |
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| 作者单位： | 中国科学院南海海洋研究所,,,, |
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| 基金项目： | 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) |
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| 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.
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| 关 键 词： | monsoon onset marine atmospheric boundary layer height atmosphere internal dynamics SST |
| 修稿时间： | 9/8/2010 12:00:00 AM |
Marine Atmospheric Boundary Layers Associated with Summer Monsoon Onset over the South China Sea in 1998 |
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| WANG Dong-Xiao,ZHOU Wen,YU Xiao-Li,XIE Qiang,WANG Xin.Marine Atmospheric Boundary Layers Associated with Summer Monsoon Onset over the South China Sea in 1998[J].Atmospheric and Oceanic Science Letters,2010,3(5):263-270. |
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| Authors: | WANG Dong-Xiao ZHOU Wen YU Xiao-Li XIE Qiang and WANG Xin |
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| Institution: | 1,2 1 Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China 2 Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China 3 Weifang Marine and Environment Monitor Center, Weifang 261401, China |
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| Abstract: | 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. |
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| Keywords: | monsoon onset marine atmospheric boundary layer height atmosphere internal dynamics SST |
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