近50a来中国不同流域降水的变化趋势分析  

Variation trend of precipitation in different river basins in recent 50 years

作　　者：谭云娟 邱新法[2] 曾燕 施国萍[1] 

机构地区：[1]南京信息工程大学地理与遥感学院,南京210044 [2]南京信息工程大学应用气象学院,南京210044 [3]江苏省气候中心,南京210009

出　　处：《气象科学》2016年第4期494-501,共8页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(41330529;41175077);江苏省第四期"333高层次人才培养工程"项目(BRA2014373)

摘　　要：利用我国612个气象站1961—2010年逐日降水量资料,借助地理信息系统Arc GIS,分析了我国十大流域的年、季节降水量的时空变化趋势特征。结果表明,我国降水主要集中在珠江、东南诸河和长江流域,西北诸河流域降水最少;四季降水量与年降水量的空间分布特征高度相似;降水量均为夏季最多,冬季最少。就年降水量而言,西北诸河流域有变湿趋势,海河流域和黄河流域有变干趋势。就降水季节而言,西南诸河、松花江、西北诸河流域春季有变湿趋势;东南诸河流域和长江流域夏季有变湿趋势,海河流域和西南诸河流域夏季有变干趋势;西北诸河流域秋季有变湿趋势,长江流域、黄河流域和淮河流域秋季有变干趋势;松花江流域、西北诸河流域和长江流域冬季有变湿趋势。Based on the daily precipitation data of 612 weather stations in China from 1961 to 2010, the spatial and temporal variation trends of annual and seasonal precipitation amount in ten river basins of China were analyzed by the geographic information system ArcGIS. Results show that precipitation in Chi- na concentrated mainly in Pearl river basin, Southeast area basin and Yangtze river basin, but seldom oc- curred in Northwest area basin. The distribution of seasonal precipitation was highly similar to that of an- nual precipitation, which all presented the most precipitation in summer and the least in winter. The an- nual precipitation trends show that the Northwest area basin become wet but the Haihe river basin and Yellow river basin become dry. Moreover, the seasonal precipitation trends show that the Southwest area basin, Songhua river basin and Northwest area basin become wet in spring, Southeast area basin and Yangtze river basin become wet but Haihe river basin and Southwest area basin were drying out in sum- mer, Northwest area basin become wet but Yangtze river basin, Yellow river basin and Huaihe river basin were drying out in autumn, Songhua river basin, Northwest area basin and Yangtze river basin become wet in winter.

关 键 词：降水量 趋势分析 流域 

分 类 号：P426.6[天文地球—大气科学及气象学]