基于TRMM/TMI的天山西部山区降水垂直分布规律的研究  

The vertical distribution law of precipitation in the western Tianshan Mountain based on TRMM/TMI

作　　者：穆振侠[1] 姜卉芳[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052

出　　处：《干旱区资源与环境》2010年第10期66-71,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(50669006);新疆维吾尔自治区高校科研计划科学研究重点项目(XJEDU2006I21);新疆水利水电工程重点学科基金(xjzdxk-2002-10-05)资助

摘　　要：山区降水垂直分布规律受多种因素的影响较复杂,目前现有水文气象站点一般都设置在高程在2000m以下的中低山带,限制了对山区降水垂直分布规律的研究。因此,借助TRMM卫星降水资料,根据研究区水汽来源方向、地形走势选取了研究区四种典型地形走势并对迎风坡和背风坡相区分探讨了天山西部山区降水在垂直方向的分布规律。通过研究发现天山西部山区降水在垂直方向上的分布规律根据地形走势的不同有多种型式,并不总是简单的随海拔高度的增加而增加,在海拔低于1000m的迎风坡出现了降水递减而部分背风坡也出现了降水增加的现象,其在垂直方向上的递增率或递减率并不是均一的,但主要的影响因素是地形,还可能受到风速大小和风向的影响,有待于进一步研究。The vertical distribution law of mountain precipitation is complex,there are many influencing factors.The reaearch on the vertical distribution law of mountain precipitation is restricted because of the existed hydrology and meteorology gauge station which the height is below 2000m.The vertical distribution law of precipitation in the western Tianshan Mountain was discused by using the TRMM/TM satellite monitor data and choosing four representative terrains and distinguishing between the windwad side and the sheltered side according to the water vapor direction and lay of the land.We found the vertical distribution law of precipitation in the west of Tianshan Mountain have more types because of the different land scape,it isn＇t always simplely increasing with the elevation of terrain.The precipitation decreases in the windwad side and the precipitation increases in the sheltered side where the elevation is below 1000m.The main influence factors is topographty,maybe it is also affected by the wind speed and direction of wind,it needs further research.

关 键 词：TRMM/TMI 降水 地形 垂直规律 海拔高度 

分 类 号：P426.6[天文地球—大气科学及气象学]