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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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澜沧江及周边流域TRMM3B43数据精度检验
DOI: 10.11821/xb201107012, PP. 994-1004
Keywords: 气象,降水,TRMM,3B43,泰森多边形,K-Means聚类,地形,澜沧江流域
Abstract:
在地形复杂的澜沧江及周边流域,利用相关系数法、散点斜率法,以研究区内35个国家基准与基本站观测数据为“真值”对1998-2009年之间月尺度的TRMM3B43降水数据精度进行检验,采用泰森多边形法、K-Means聚类法分析了高程与坡度对检验结果的影响,借助主成分法比较了高程与坡度对TRMM3B43的影响程度。研究表明在整体上,月尺度的TRMM3B43数据具有较高精度；就个体而言,研究区上游与下游地区具有较高的精度,而在波密,以及中游的贡山、德钦、德钦及香格里拉等地区精度较低；高程对TRMM3B43数据精度的影响小于坡度,在空间上呈现出较复杂的变化趋势,自托托河—勐腊随着海拔的降低,数据精度出现高值—低值—高值的变化规律；坡度对TRMM3B43数据精度有较大影响,坡度越大,数据精度越低。
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