Accuracy Evaluation of Tropical Rainfall Measuring Mission Precipitation Data in Complex Mountainous Areas -Taking Chongqing City as an Example

WU Jian-feng; CHEN A-lin; JI Tao; LI Jun; LU Xiao-ping

doi:10.13961/j.cnki.stbctb.2014.04.054

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Accuracy Evaluation of Tropical Rainfall Measuring Mission Precipitation Data in Complex Mountainous Areas -Taking Chongqing City as an Example

- Accuracy Evaluation of Tropical Rainfall Measuring Mission Precipitation Data in Complex Mountainous Areas -Taking Chongqing City as an Example
- Bulletin of Soiland Water Conservation Vol. 33, Issue 4, Pages: 201-207(2014)
- 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：
- DOI：10.13961/j.cnki.stbctb.2014.04.054
  CLC：
- Published：2014
- 稿件说明：
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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：

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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