JOURNAL OF NATURAL RESOURCES ›› 2015, Vol. 30 ›› Issue (6): 1047-1056.doi: 10.11849/zrzyxb.2015.06.015

• Resource Research Method • Previous Articles     Next Articles

Accuracy Validation and Application of TRMM Precipitation Data in Northeast China

LIU Xiao-chan, ZHAO Jian-jun, ZHANG Hong-yan, GUO Xiao-yi, ZHANG Zheng-xiang, FU Yuan-yuan   

  1. School of Geographical Sciences, Northeast Normal University, Changchun 130024, China
  • Received:2014-07-10 Revised:2015-01-10 Online:2015-06-20 Published:2015-06-20

Abstract:

As the important component of the global water cycle, precipitation is the key parameter in hydrology, meteorology and climate. Conventional interpolated observed precipitation data cannot reflect the spatial variation due to the limitation of the number of stations. In recent decades, with the development of remote sensing and meteorological satellite technology, satellite remote sensing images has become an important source of spatial precipitation data to detect rainfall information. In this study, APHRODITE precipitation data in Northeast China from 2000 to 2007 are used. We adjust the TRMM precipitation data based on GWR method, validate the accuracy of the adjusted data, and analyze the spatial and temporal distribution characteristics of precipitation in Northeast China based on the adjusted TRMM precipitation data. The conclusions are: 1) Correlation coefficient between APHRODITE and observed data is higher, and the root mean square error is smaller, so APHRODITE data have a higher accuracy. 2) The adjusted TRMM precipitation data have a higher correlation coefficient and a smaller RMSE value. Overall, the TRMM precipitation is higher than that of observed data. 3) High value of R mainly exists in the northern, eastern and southeastern regions, low-values mainly exist in the western and central regions. 4) The BIAS of adjusted TRMM precipitation data is relatively small from May to October. Overall, the BIAS of most areas ranges in 0-30%. 5) The distribution of precipitation is uneven in Northeast China, which reduces from the southeast to the northwest. The rainfall mostly happens in summer while less happens from November to the following March. The largest rainfall happens in July.

Key words: TRMM precipitation, GWR, Northeast China, accuracy validation

CLC Number: 

  • P426.6