地理科学

地理科学 ›› 2013, Vol. 33 ›› Issue (9): 1125-1131.doi: 10.13249/j.cnki.sgs.2013.09.1125

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TRMM降水数据在横断山区的精度

朱国锋1, 蒲焘2, 张涛2, 刘海龙1, 张学斌1, 梁峰1   

  1. 1.西北师范大学地理与环境科学学院, 甘肃 兰州730000
    2.中国科学院寒区旱区环境与 工程研究所冰冻圈科学国家重点实验室, 甘肃 兰州730000
  • 收稿日期:2012-09-20 修回日期:2013-04-13 出版日期:2013-09-30 发布日期:2013-08-16
  • 作者简介:

    作者简介：朱国锋（1983-）,男,甘肃平凉人,博士,主要从事水文学研究。E-mail:guofengzhu@me.com

  • 基金资助:
    国家自然科学基金项目（41273010、41271133、41261104)资助

The Accuracy of TRMM Precipitation Data in Hengduan Mountainous Region, China

Guo-feng ZHU1, Tao PU2, Tao ZHANG2, Hai-long LIU1, Xue-bin ZHANG1, Feng LIANG1   

  1. 1.College of Geography and Environment Science, Northwest Normal University, Lanzhou, Gansu 730070, China
    2. State Key Laboratory of Cryosphere Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • Received:2012-09-20 Revised:2013-04-13 Online:2013-09-30 Published:2013-08-16

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被引次数

25

摘要：

利用相关系数法和散点斜率法对横断山区1998~2011年之间月尺度的TRMM 3B43降水数据精度进行了检验。研究表明,TRMM 3B43降水数据与实测数据相关性很强,但是比实测降水量偏大33.9%。在横断山北部大雪山以东地区和南部香格里-贡山-德钦一带三江并流区TRMM 3B43数据误差较大。各个季节TRMM 3B43降水与实测值误差的空间分布有较大区别,但是都表现为北部沿经向分布,南部沿纬向分布的趋势;横断山区高海拔地区气象站点稀少和复杂的下垫面环境是产生观测误差的主要原因。

关键词: 降水, TRMM 3B43, 相关系数法, Kriging插值, 横断山区

Abstract:

Based on the correlation coefficients and scatter points slope methods, the accuracy of TRMM 3B43 data at monthly time scale during 1998-2011 was validated using 24 meteorological stations data, with the method of Kriging under ArcGIS,the error spatial distribution map of TRMM 3B43 data was drawn in order to research the regional difference. There was a strong correlation between TRMM 3B43 data and meteorological stations observation data(R=0.928;p<0.01), but the value of TRMM 3B43 precipitation was greater than meteorological station, the deviations were 32.0%(spring), 38.3%(summer), 36.8%(autumn), 34.9%(winter), respectively. The TRMM 3B43 data was accurate in the south and the northwest, while the northeast and middle area was poor, especially in east Mt. Daxue and three Parallel Rivers area, the deviation is greater than 35% in east Mt. Daxue and three Parallel Rivers area and 25%-35% in other areas. The error spatial distribution of TRMM 3B43 precipitation is quite different, but most distribution follows a basic structure that distributed along the longitude in north of Hengduan Mountains and along latitude in south. The meteorological stations in Hengduan Mountainous Region are spaced widely and distributed unevenly. The terrain is complicated and varied in the study area, the longitudinal range-gorge caused an obvious action that east and west blocked but north and south through, which impacted on the spatial distribution of southwest monsoon obviously, and the southwest monsoon is the crucial factor which influenced the precipitation of Hengduan Mountainous Region. In spring and summer, the precipitation spatial and temporal distribution is discontinuous because of range-gorge terrain. In autumn and winter, the precipitation equivalent area distributed continuously, the influence of terrain is not obvious. The main error sources of the meteorological stations are of scarcity at high elevation and the mountain terrain special surface.

Key words: precipitation, TRMM 3B43, correlation analysis, Kriging interpolation, Hengduan Mountainous region

中图分类号: 

  • p426.1/p467