TRMM降水数据在复杂山地的精度评估——以重庆市为例

吴建峰; 陈阿林; 嵇涛; 李军; 鲁小平

doi:10.13961/j.cnki.stbctb.2014.04.054

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TRMM降水数据在复杂山地的精度评估——以重庆市为例

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- TRMM降水数据在复杂山地的精度评估——以重庆市为例
- Accuracy Evaluation of Tropical Rainfall Measuring Mission Precipitation Data in Complex Mountainous Areas -Taking Chongqing City as an Example
- 水土保持通报 2014年33卷第4期页码：201-207
- 作者机构：
  
  1. 重庆师范大学地理与旅游学院,重庆,400047
  2. GIS应用研究重庆市高校重点实验室,重庆,400047
  3. 重庆市气象局,重庆,401147
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目"岩溶槽谷区水土流失特征及机理研究"(41202135);重庆市气象局开放式研究基金项目(Kfjj-201303);重庆市自然科学基金(cstc2012jjA80008)
- DOI：10.13961/j.cnki.stbctb.2014.04.054
  中图分类号：
- 纸质出版：2014
- 稿件说明：
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吴建峰, 陈阿林, 嵇涛, 等. TRMM降水数据在复杂山地的精度评估——以重庆市为例[J]. 水土保持通报, 2014,33(4):201-207.

WU Jian-feng, CHEN A-lin, JI Tao, et al. Accuracy Evaluation of Tropical Rainfall Measuring Mission Precipitation Data in Complex Mountainous Areas -Taking Chongqing City as an Example[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 201-207.
吴建峰, 陈阿林, 嵇涛, 等. TRMM降水数据在复杂山地的精度评估——以重庆市为例[J]. 水土保持通报, 2014,33(4):201-207. DOI： 10.13961/j.cnki.stbctb.2014.04.054.

WU Jian-feng, CHEN A-lin, JI Tao, et al. Accuracy Evaluation of Tropical Rainfall Measuring Mission Precipitation Data in Complex Mountainous Areas -Taking Chongqing City as an Example[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 201-207. DOI： 10.13961/j.cnki.stbctb.2014.04.054.

摘要

在地形复杂的重庆地区

利用研究区内34个气象站点实测数据

分别从年、季、月3个尺度

对2000-2011年间TRMM 3B43降水数据精度进行了验证

并分析了高程和坡度对月尺度验证结果的影响

同时利用主成分分析法比较了高程与坡度对TRMM 3B43降水数据的影响程度。研究表明:(1) 年尺度上

TRMM 3B43年降水数据普遍高于气象站点的实测结果(平均偏高5.86%)

渝西、渝南的结果比渝东北的准确。季尺度上

秋季拟合效果高于其它3个季节。月尺度上

Abstract

Chongqing City is a typical area with complicated terrain. The accuracy of TRMM(Tropical Rainfall Measuring Mission) 3B43 precipitation data has been verified by period of year

season and month through the data getting from 34 meteorological stations and the impact of elevation and slope on the result of monthly scale were analyzed. The results shows:(1) Counted by year

TRMM 3B43 annual precipitation is generally more than the measured data(on average more than 5.86%)

and in Western Chongqing City and Southern Chongqing City are more accurate than in Northeastern Chongqing City. Meanwhile

by season

the precipitation of autumn is more accurate than that of the other three seasons. For the month scale

the relation between TRMM 3B43 monthly precipitation data and the measured precipitation was obvious(R=0.85).(2) From each meteorological station

the data are more accurate in the researched areas

and the correlation coefficients are higher than 0.8.(3) As the altitude increases

the correlation coefficient R shows a "increase-decrease-increase" trend

and the absolute deviation is decreasing. However when the gradient increases

the absolute deviation shows a "increase-decrease-increase" trend

and the absolute deviation exhibits linear increasing trend.(4) Analysis by using principal component shows that the impact of elevation on data accuracy was greater then that of slope.

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