迎风坡降水对中国东南地区降水贡献的估测  

On the contribution of upslope precipitation to the observational precipitation over southeastern China

作　　者：徐昕[1] 王其伟[1] 王元[1] 

机构地区：[1]南京大学中尺度灾害性天气教育部重点实验室大气科学学院,南京210093

出　　处：《南京大学学报（自然科学版）》2010年第6期625-630,共6页Journal of Nanjing University（Natural Science）

基　　金：国家自然科学基金(40705019;40775034)

摘　　要：本文利用2001-2007年中国东南地区84个观测台站的逐日降水资料,0.5°×0.5°的中国地形资料,以及日本气象厅20 km分辨率的再分析风场、温度场和湿度场资料,研究了迎风坡降水对中国东南地区观测降水的可能贡献.研究发现,中国东南地区北部迎风坡降水对观测降水的贡献最大,而中部地区迎风坡降水对观测降水的贡献最小.迎风坡降水占观测降水的比例与地形梯度的经向分布基本一致,表明地形因素对东南地区的降水有着重要的影响.Possible contribution of upslope precipitation to the observational precipitation over southeastern China is studied using the daily precipitation data of 84 stations and 0.5°×0.5° topography data.The reanalysis datasets of wind,temperature and humidity with a resolution of 20 km×20 km from Japan Meteorological Agency are used to calculate the upslope precipitation.The results show that upslope precipitation has the largest contribution to the observational precipitation in the northern part of southeastern China,while it is much smaller in the central region.The meridional distribution of upslope precipitation in the observational precipitation is in good agreement with that of topography gradient,indicating the notable influence of topography on the precipitation over southeastern China.

关 键 词：迎风坡降水 观测降水 中国东南地区 

分 类 号：P426[天文地球—大气科学及气象学]