天山山区1961—2010年面雨量分布及变化特征  

Distribution and Change Characteristics of Areal Precipitation in Tianshan Mountains During 1961-2010

作　　者：赵玲[1,2] 杨青[2] 安沙舟[1] 

机构地区：[1]新疆农业大学草业与环境科学学院,新疆草地资源与生态重点实验室,新疆乌鲁木齐830052 [2]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002

出　　处：《沙漠与绿洲气象》2013年第2期20-24,共5页Desert and Oasis Meteorology

基　　金：新疆维吾尔自治区自然科学基金(200821176);国家重点基础研究发展计划(2010CB951001);国家科技支撑计划课题(2012BAC23B01);中央级公益性科研院所基本科研业务费专项资金(IDM201006)共同资助

摘　　要：利用1961—2010年天山山区44个气象站和10个水文站的观测资料,结合数字高程模型(DEM)1 km×1 km网格数据,采用了自然正交分解(EOF)、多元回归分析、最大熵谱值分析等方法,对天山山区面雨量进行了计算,建立了区域面雨量时间序列,研究其时空分布特征及变化规律。天山山区的面雨量基本上呈现北多南少,西多东少的特征,多年平均面雨量1 098.7×108m3,且在1987年发生突变。冬季降水在年际变化和年代际变化特征上都呈现出明显的增加趋势。。This paper analysed annual and seasonal distribution and change characteristics of aeral precipitation if Tianshan mountains using 44 meteorological and hydrological stations during 1961- 2009 and 1 kmxl km digital elevation model （DEM） data. The methodologies include EOF, multi- regression analysis, maximum entropy analysis and Geographic Information System. In Tianshan mountains, annual mean areal precipitation is around 1 903.2x108 m3. To seasonal distributions, summer has the most areal precipitation. Over the past 50 years from 1961 to 2009, the inter- annual variation range of precipitation in Tianshan mountains was relatively large and presented an increasing trend. Especially since 1987, precipitation had increased significantly.

关 键 词：天山山区 差值模型 面雨量 

分 类 号：P468[天文地球—大气科学及气象学]