Numerical Simulations of Impacts of Land Surface and Sea Surface Temperatures on the Onset Date of South China Sea Summer Monsoon
The present study analyzes differences in spatial and temporal variations of surface temperature between early and late onset years of the South China Sea summer monsoon (SCSSM). It is found that when land surface temperature north of 40°N is lower (higher) and the sea surface temperature over the South China Sea-western North Pacific(SCS-WNP) is higher (lower) in winter, the onset of the SCSSM begins earlier (later) and that when land surface temperature north of 40°N is higher (lower) and sea surface temperature over the SCS-WNP is lower (higher) in spring, the onset of the SCSSM occurs earlier (later). In order to verify the mechanism of influences of the land and sea surface temperature distribution patterns and test the ability of the p-σ regional climate model (P-σRCM9) to simulate the SCSSM onset, three types of years with early, normal and late SCSSM onset are selected and the SCSSM regimes are numerically simulated. According to the results obtained from five sensitive experiments, it is revealed that when the land surface temperature is higher in the eastern part north of 40°N and lower in the western part north of 40°N, and it rises faster in eastern coastal regions and Indian Peninsula, while sea surface temperature over the SCS-WNP is lower, the early onset of the SCSSM can be expected.
surface temperature South China Sea Summer monsoon numerical simulations
Liu Peng Qian Yongfu
Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Department of Atmospheric Sciences Nanjing University Nanjing,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）