The Applicability Analysis of TRMM Precipitation in the Three Gorges Reservoir Area of Chongqing and Its Spatial-temporal Distribution
The Applicability Analysis of TRMM Precipitation in the Three Gorges Reservoir Area of Chongqing and Its Spatial-temporal Distribution
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重庆三峡库区TRMM降水适用性分析及其时空分布
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Wu Jianfen
中科院分区：
文献类型：
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作者：
Wu Jianfen
以重庆三峡库区为研究对象，通过17个气象站的年、季、月尺度实测资料，验证了TRMM(Tropical Rainfall Measurement Mission) 3B43降水资料的适用性。在此基础上，利用TRMM降水资料分析了研究区降水的时空分布特征。结果表明：(1)操作方向上，TRMM降水与现场资料存在明显的线性相关关系，说明TRMM降水具有较好的实用性。在年尺度上，相关系数R = 0。89. 在季节尺度上，TRMM降水数据通过a = 0。置信水平为01。相关系数较低（R = 0）。在春天。在月尺度上，相关系数为0。84.(2)降水空间分布上，总体呈现由西南向东北逐渐增加的趋势。高值出现在东北地区。西南地区呈低值区，中部、南部和脊西边缘呈中值区。(3)在降水的时间分布上，各季节降水存在显著差异。夏季降水最多，冬季降水最少。从月份来看，降水主要集中在5 - 8月，约占全年降水量的60%。但第二年12月至2月降水量占全年降水量的5%左右。
For the study of the three gorges reservoir area of Chongqing,the applicability of TRMM( Tropical Rainfall Measurement Mission) 3B43 precipitation data has been verified by the measured data getting from 17 meteorological stations on the year,the season and the month scale. On this basis,this paper analyzes the spatial and temporal distribution of precipitation in the study area based on the TRMM precipitation data. The result showed that:( 1) Manipulative direction,there exist obvious linear correlation between TRMM precipitation and site data,so this can prove TRMM precipitation has good practicality. On the year scale,correlation coefficient R = 0. 89. On the season scale,TRMM precipitation data has through a = 0. 01 confidence level. The correlation coefficient is relatively low( R = 0. 79)in the spring. On the month scale,the correlation coefficient is 0. 84.( 2) On the spatial distribution of precipitation,the precipitation shows a gradually increasing trend from southwest to northeast on the whole. High values appeared in the northeast region. Low values appeared in the southwest region and the area of median values appeared in the central region,the southern region and the western edges of the ridge area.( 3) On the temporal distribution of precipitation,there are significant differences in the seasonal precipitation. The maximum rainfall appeared in summer and the minimum rainfall appeared in winter. The aspect of the month,precipitation mostly concentrated in May-August,accounting for about 60% of annual precipitation. However,the precipitation accounting for about 5% of annual precipitation from the December to the February in the second year.