摘要
In this study, the atmospheric moisture sources affecting three sub-regions of East China, which are South China (SC), the middle and lower Yangtze River Valleys (YRV), and North China (NC), are identified and compared based on the simulation results of a Lagrangian particle dispersion model, FLEXPART, for the period 2000-2009. The investigation is conducted for non-precipitation' and precipitation' cases of summertime (May-September) and wintertime (October-April). Furthermore, the contributions of moisture originating from the land area, western Pacific Ocean, and Indian Ocean to the precipitation in the three sub-regions of East China are quantitatively estimated. The results indicate that during summertime, the transport of moisture from the Indian Ocean and western Pacific dominates the precipitation in SC, with almost equivalent contributions; evaporation over the land area seems to be the key contributor to the precipitation in YRV and NC, followed by the evaporation over the western Pacific. During wintertime, the precipitated moisture in SC originates largely from the western Pacific, while evaporation over the land area is the predominant contributor to the precipitation in YRV and NC. The results of this study indicate that the precipitation in the three sub-regions of East China reflect the contributions of the Indian monsoon and East Asian summer monsoon to different degrees.
- 出版日期2015-7
- 单位中国科学院大气物理研究所; 中国科学院大学