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首页> 外文期刊>Journal of Hydrology >Intercomparison of the Version-6 and Version-7 TMPA precipitation products over high and low latitudes basins with independent gauge networks: Is the newer version better in both real-time and post-real-time analysis for water resources and hydrologic extremes?
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Intercomparison of the Version-6 and Version-7 TMPA precipitation products over high and low latitudes basins with independent gauge networks: Is the newer version better in both real-time and post-real-time analysis for water resources and hydrologic extremes?

机译：具有独立仪表网络的高纬和低纬盆地的版本6和版本7 TMPA降水产品之间的比对：较新的版本在水资源和极端水文的实时和实时后分析中是否更好？

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The TRMM Multi-satellite Precipitation Analysis (TMPA) system underwent an important upgrade in early 2013, at which the newest Version-7 TMPA products were formally released. In this study, the TMPA successive versions, original Version-6 and current Version-7, were evaluated and intercompared by using independent gauge observation networks for a 7-yr (2003-09) period over two representative basins in China at different latitude bands. The TMPA products studied are the Version-6 and Version- 7 real-time 3B42RT estimates (RTV6 and RTV7) and post-real-time 3B42 estimates (V6 and V7). Assessments indicate that RTV7 represents a substantial improvement over RTV6 with respect to the systematic bias in the low-latitude Mishui basin, reaching similar accuracy levels as with the gauge-adjusted research products. But, such improvement was not found in the high-latitude Laohahe basin, suggesting that the current Version 7 TMPA real-time estimates still have much room for improvement at high latitudes. On the other hand, the post-real-time research product V7, which is expected to provide better precipitation information for water resources management in ungauged regions, generally outperforms V6 over both gauged basins and has the best performance among the four standard TMPA estimates. The seasonal analyses show that the new Version-7 algorithm notably reduces the bias between TMPA and observations during winter months for the low-latitude Mishui basin, but fails to effectively alleviate the serious overestimation for winter precipitation occurring in the high-latitude Laohahe basin. The study also reveals that all the TMPA products significantly underestimate high rain rates over the Mishui basin, especially for strong typhoon events during summer. Thus, caution should be exercised when applying the current Version-7 TMPA products for simulation and prediction of hydrologic extremes associated with heavy rainfall, such as floods or landslides.
机译：TRMM多卫星降水分析（TMPA）系统于2013年初进行了重要升级，正式发布了最新的Version-7 TMPA产品。在这项研究中，通过使用独立的仪器观测网络对中国两个代表性盆地在不同纬度带上的7年（2003-09年）期间的TMPA连续版本（原始版本6和当前版本7）进行了评估和比较。 。研究的TMPA产品是版本6和版本7实时3B42RT估算（RTV6和RTV7）和实时后3B42估算（V6和V7）。评估表明，就低纬度密水盆地的系统偏差而言，RTV7较RTV6有了实质性的改进，达到了与轨距调整研究产品相似的精度水平。但是，在高纬度老哈河盆地没有发现这种改善，这表明当前的第7版TMPA实时估计值在高纬度地区仍有很大的改善空间。另一方面，实时后研究产品V7有望为未开垦地区的水资源管理提供更好的降水信息，在两个规范流域上通常都优于V6，并且在四个标准TMPA估算中表现最佳。季节性分析表明，新版Version-7算法显着降低了低纬度密水盆地冬季TMPA与观测值之间的偏差，但未能有效缓解高纬度老哈河盆地冬季降水的严重高估。这项研究还表明，所有TMPA产品都大大低估了密水盆地的高降雨率，特别是对于夏季的强台风事件。因此，在将当前的Version-7 TMPA产品用于模拟和预测与大雨有关的极端水文（例如洪水或山体滑坡）时，应谨慎行事。

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