影响山东夏季降水的季风水汽输送特征分析  

THE CORRELATIVE ANALYSIS BETWEEN MOISTURE TRANSPORT OVER MONSOON AREAS AND THE SUMMER RAINFALL IN SHANDONG PROVINCE

作　　者：王庆[1] 刘诗军[1] 

机构地区：[1]山东省气象科学研究所,济南250031

出　　处：《气象科学》2006年第2期197-202,共6页Journal of the Meteorological Sciences

基　　金：科学技术部社会公益研究专项项目(编号:2001DIB20104);山东省气象局2002年重点项目"山东夏季降水与副热带季风的关系"共同资助

摘　　要：利用NCEP／NCAR月平均风场和比湿资料分析了亚洲季风区平均水汽输送通量的气候特征和季节变化；研究了山东旱涝年季风区水汽输送的差异及其在不同时段对山东夏季降水异常的贡献。结果表明，山东地区的平均水平水汽输送通量存在着明显的年际变化，纬向、经向和总水汽输送通量随时间均呈单峰曲线分布，7月达极值；影响山东夏季降水的印度季风区水汽输送以纬向为主、副热带季风区水汽输送以经向为主；5～6月，来自热带印度洋的西南季风水汽输送通量、西太平洋热带和副热带东南季风水汽输送通量以及南海北部的水汽输送通量对山东夏季降水均有贡献，涝年水汽输送通量明显大于旱年。虽然7月来自印度洋的西南季风水汽输送通量达极值，但对山东夏季降水异常的贡献并不显著，7～8月主要是来自西太平洋地区的热带和副热带季风水汽输送对山东夏季降水异常的贡献较明显。Climatological water vapor transport over monsoon areas is investigated based on NCEP/ NCAR wind and moisture reanalysis data for the period 1958-1998. The climatological characteristics of water vapor transport over Shandong province is analyzed. It is indicated that the water vapor transport in May and June from tropical Indian Ocean, tropical and sub-tropical West Pacific is important to the summer rainfall in Shandong province, and the water vapor transport in flood years is much more than that in drought years. In July, ,although the water vapor transport from tropical Indian Ocean arrives its maximum and the mostly part of China is dominated by south-west monsoon, its contribution to summer rainfall abnormality in Shandong province is undistinguished, on the other hand,the contribution resulted from subtropical West Pacific is evident. The latitudial transports from tropical Indian Ocean and the longitudinal transports from sub-tropical West Pacific is correlative to summer rainfall in Shandong.

关 键 词：季风 水汽输送 通量 夏季降水 

分 类 号：P458[天文地球—大气科学及气象学]