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《Climatic and Environmental Research》 2001-04
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Climatological Characteristics of Moisture Transport during Summer Monsoon over South China Sea

Xie An and Song Yanyun (Department of Geophysics, Peking University, Beijing 100871) Mao Jiangyu and Ye Qian (Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029)  
Climatological characteristics are investigated for moisture transport during summer mon-soon over the South China Sea (SCS) based on NCEP/ NCAR reanalysis data for the period of 1973~1998. It is found that the significant difference of moisture transport over East Asia exist between months due to evolutions of monsoon circulation. The moisture transports coming from the upstream of Indian Ocean play important roles in the SCS moisture budget, the SCS monsoon onset and the South China precipitation. Meridional transport is favorable to moisture convergence over South China between 200N and 300N. The SCS is a moisture sink area. Moisture transport channels in early onsetyears are significantly different from that in delayed onset years. For early onset years, the moisture passageway from the equatorial Indian Ocean to the SCS occurs earlier and maintains for a longer time, the SCS is liable to become moisture convergence region in the period of April~ May. For delayed years, the moisture over the SCS remains divergent in the end of Spring and the beginning of Summer, which is not favorable to the SCS monsoon.
【Fund】: 国家科技部攀登项目A“南海季风试验研究”;; 国家自然科学基金资助项目49975023联合资助
【CateGory Index】: P434.5
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