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基于TRMM数据的祁连山大气降水时空分布特征
1,2, 1, 1, 1,2

(1.zhongguokexueyuan xibeishengtaihuanjingziyuanyanjiuyuan gaohanshanqutongweisushengtaishuiwenyuhuanjingbaohuguanceyanjiuzhan/gansushengqilianshanshengtaihuanjingyanjiuzhongxin/neiluheliuyushengtaishuiwenzhongdianshiyanshi, lanzhou 730000; 2.zhongguokexueyuandaxue, beijing 100049)

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Spatial and Temporal Distribution Characteristics of Precipitation in Qilian Mountains Based on TRMM Data
XUE Jian1,2, LI Zongsheng1, LI Zongjie1, GUI Juan1,2

(1.observation and research station of eco-hydrology and environmental protection by stable isotope tracing in high and cold mountainous areas /key laboratory of ecohydrology of inland river basin/gansu qilian mountains ecology research center, northwest institute of eco-environment and resources, chinese academy of sciences, lanzhou 730000, china; 2.university of chinese academy of sciences, beijing 100049, china)

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备注

亚博appgenjutrmm3b43weixingjiancededaqijiangshuishujuxinxi,tongshijieheqilianshandiquqixiangzhandianshiceshujuxinxi,fenxiliangzhexiangguanxishuhewuchadengzhibiaojinxingtrmmjiangshuishujudejingdujianyan,bingjiehemann-kendalltubianjianyanfenxiqilianshandaqijiangshuidebianhuatezheng。zuihoujianyanjieguobiaoming:(1)trmm3b43shujuzaigaidiquzhengtishangjingdujiaogao,shiyongxinglianghao,qizhongtrmmjiangshuishujutonggaidiquqixiangzhandiandeceliangshujuzainianchiduxiaxiangguanxishuwei0.79,zaiyuechiduxiadexiangguanxishuwei0.74,jichiduxiadezhengtijingdulvedi,zaidongjidexiangguanxishujinwei0.44,youmingxiandedizhigaoguxianxiang;(2)qilianshandiqujiangshuidekongjianfenbudazhishangchengzidongxiangxidijiandequshiqienianneijijiefenpeibujun;(3)tongguomann-kendalltubianjianyan,faxianjin21nianneiyanjiuqudenianjunjiangshuilianghejijunjiangshuiliangjunbianhuafuza,bingzaijinjinianchengxianshangshengdequshi。

亚博appbased on the atmospheric precipitation data of trmm3b43 satellite and the measured data of meteorological station, the accuracy test of trmm precipitation data was carried out by analyzing the correlation coefficient, error and other indicators. the variation characteristics of atmospheric precipitation in qilian mountains were analyzed with the mann-kendall mutation test. the results show that:(1)trmm3b43 precipitation data in qilian mountains area has high overall precision, good applicability, including trmm precipitation data from stations on the measured data in yearly scales and monthly scales of the correlation coefficient of 0.79 and 0.74, respectively, the overall precision of seasonal scales is slightly low, the correlation coefficient is only 0.44 in winter, there is obvious low overestimate phenomenon;(2)the spatial distribution of precipitation in qilian mountains is generally decreasing from east to west, and the seasonal distribution is uneven;(3)through the mann-kendall mutation test, it was found that both the annual average precipitation and the seasonal average precipitation in the study area in the past 21 years had changed in a complex way, and had shown the upward trend in recent years.

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