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RISS 인기검색어
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- 저자 : TIAN Fuyou (검색결과 1 건)
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Analyses of Quantitative Precipitation Estimation (QPE)Based on erging Satellite and Rain Gauge
QI Dan,TIAN Fuyou,Zhao Xiaolin 한국기상학회 2011 한국기상학회 학술대회 논문집 Vol.2011 No.10-2
Satellite precipitation estimates are widely used to measure global rainfall on monthly, daily, and hourly timescales for studies. Near real-time satellite precipitation estimates are becoming increasingly available to the wider community. These precipitation estimates are potentially very useful for applications such as numerical weather prediction (NWP) data assimilation, now casting and flash flood warning, tropical rainfall potential, and water resources monitoring, etc. As with any observational data, it is important to understand their accuracy and limitations. This is done by verifying the satellite precipitation estimates against independent data from rain gauges. The terms evaluate and verify are used here to mean "to determine or test the truth or accuracy of the QPE (Quantitative Precipitation Estimation) product" (John E.1999) High resolution rainfall distribution map can be derived from satellite observation, and rain gauges data can give us accurate rainfall measurements at a fixed location .Combined them together, the merging of satellite precipitation estimates and rain gauge measurement is to "calibrate" satellite precipitation estimation with ground observation, so that a more accurate rainfall field can be drawn. In this paper, we use a intellective objective analysis scheme which is brought forward by LU nai-meng (2004) to accomplish the merging or called "fusing". In this study, the satellite precipitation estimation data we used to fusing is from the National Satellite Meteorological Center (NSMC) which resolution is 0.1 degree. The rain gauge data is from the National Meteorological Information Center (NMIC). Based on the hourly and daily rain gauge precipitation observations of over 30000 rain gauges and the satellite precipitation estimation products, a real-time merging system to get the QPE product is established. At last we have done a series of evaluate and verify job to test the accuracy of the QPE products.
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