Validation of the satellite-derived rainfall estimates over the Tibet

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• 作者：Duo Chu ; Tundrop Pubu ; Ghancan Norbu …
• 关键词：precipitation ; validation ; satellite rainfall estimation ; Tibetan Plateau
• 刊名：Journal of Meteorological Research
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：25
• 期：6
• 页码：734-741
• 全文大小：747 KB
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• 作者单位：Duo Chu (1) (2)
  Tundrop Pubu (3)
  Ghancan Norbu (3)
  Bajracharya Sagar (4)
  Shrestha Mandira (4)
  Jianping Guo (5)
  
  1. Institute of Plateau Meteorology, CMA, Chengdu, 610072, China
  2. Tibet Institute of Plateau Atmospheric and Environmental Sciences, Lhasa, 850000, China
  3. Tibet Weather Observatory, Tibet Meteorological Service, Lhasa, 850000, China
  4. International Centre for Integrated Mountain Development (ICIMOD), Kathmandu, Nepal
  5. Chinese Academy of Meteorological Sciences, CMA, Beijing, 100081, China
  
• 刊物类别：Atmospheric Sciences; Meteorology; Geophysics and Environmental Physics; Atmospheric Protection/Air
• 刊物主题：Atmospheric Sciences; Meteorology; Geophysics and Environmental Physics; Atmospheric Protection/Air Quality Control/Air Pollution;
• 出版者：The Chinese Meteorological Society
• ISSN：2198-0934

文摘

Measuring rainfall from space appears to be the only cost effective and viable means in estimating regional precipitation over the Tibet, and the satellite rainfall products are essential to hydrological and agricultural modeling. A long-standing problem in the meteorological and hydrological studies is that there is only a sparse raingauge network representing the spatial distribution of precipitation and its quantity on small scales over the Tibet. Therefore, satellite derived quantitative precipitation estimates are extremely useful for obtaining rainfall patterns that can be used by hydrological models to produce forecasts of river discharge and to delineate the flood hazard area. In this paper, validation of the US National Oceanic and Atmospheric Administration (NOAA) Climate Prediction Center (CPC) RFE (rainfall estimate) 2.0 data was made by using daily rainfall observations at 11 weather stations over different climate zones from southeast to northwest of the Tibet during the rainy season from 1 June to 30 September 2005 and 2006. Analysis on the time series of daily rainfall of RFE-CPC and observed data in different climate zones reveals that the mean correlation coefficients between satellite estimated and observed rainfall is 0.74. Only at Pali and Nielamu stations located in the southern brink of the Tibet along the Himalayan Mountains, are the correlation coefficients less than 0.62. In addition, continuous validations show that the RFE performed well in different climate zones, with considerably low mean error (ME) and root mean square error (RMSE) scores except at Nielamu station along the Himalayan range. Likewise, for the dichotomous validation, at most stations over the Tibet, the probability of detection (POD) values is above 73% while the false alarm rate (FAR) is between 1% and 12%. Overall, NOAA CPC RFE 2.0 products performed well in the estimation and monitoring of rainfall over the Tibet and can be used to analyze the precipitation pattern, produce discharge forecast, and delineate the flood hazard area. Key words precipitation validation satellite rainfall estimation Tibetan Plateau