大气科学2011，Vol.35Issue(5)：871-884,14.
GAMIL1.0大气模式模拟的西北太平洋夏季风:阵风参数化方案的影响
The Western North Pacific Summer Monsoon Simulated by GAMIL 1.0: Influences of the Parameterization of Wind Gustiness
摘要
Abstract
The performance of GAMIL 1. 0, a grid atmospheric model developed by the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, in simulating the western North Pacificsummer monsoon is investigated. Influence on the simulation exerted by the inclusion of wind gustiness parameterization is discussed. Results show that major features of both the mean state and interannual variability of WNPSM are reasonably reproduced in the original version, but the strength is underestimated. After the inclusion of wind gustiness parameterization , improvements are obvious and mainly displayed as follows: the regional mean precipitation increases from 5. 71 mm/d to 8. 35 mm/d, which is more close to the observation; the correlation coefficient between the simulated and observed monsoon indices increases from 0. 66 to 0. 82; the amplitude of interannual variability becomes larger; more important, the simulated "ENSO- monsoon" relationship is almost the same as the observation. Analyses on the latent heat flux, heating rate, and divergent circulation indicate that the improvement in the mean state should be attributed to the enhancement of surface latent heating over the western North Pacific region. The improvement of interannual variability is related to the better mean state. The inclusion of wind gustiness parameterization leads to stronger surface wind speed, which enhances the surface latent heating. Then the mean precipitation is increased, indicating that the climate mean precipitation is improved Following the improvement of cli-matological mean precipitation, the model's response to El Nifio-type SST forcing is significantly improved, which is evident for both the heating field and corresponding upper-tropospheric convergence center in the western North Pacific.关键词
西北太平洋夏季风/年际变率/阵风参数化方案Key words
western North Pacific summer monsoon, interannual variability, parameterization of wind gustiness分类
天文与地球科学引用本文复制引用
刘晓娟,周天军,张丽霞,邹立维,吴波,李忠贤..GAMIL1.0大气模式模拟的西北太平洋夏季风:阵风参数化方案的影响[J].大气科学,2011,35(5):871-884,14.基金项目
国家自然科学基金资助项目40890054、 40821092和国家科技支撑计划2007BAC29B03 （）
