Evaluating Satellite Precipitation Error Propagation in Runoff Simulations of Mountainous Basins
Evaluating Satellite Precipitation Error Propagation in Runoff Simulations of Mountainous Basins
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DOI：
10.1175/jhm-d-15-0081.1
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发表时间：
2016-04
影响因子：
3.8
通讯作者：
Y. Mei;E. Nikolopoulos;E. Anagnostou;M. Borga
中科院分区：
文献类型：
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作者：
Y. Mei;E. Nikolopoulos;E. Anagnostou;M. Borga
本文研究了6个准全球卫星降水产品的误差特征及其在意大利东北部山区盆地尺度(255-6967 km2)和两个不同时段(5-8月和9-11月)气流模拟中的误差传播。统计描述了降雨和径流之间的系统误差和随机误差、时间相似性和误差率。总体而言，显示了与近实时3B42/气候预测中心变形技术(CMORPH)产品相关的严重高估/低估。结果表明，系统误差与盆地高程呈正相关。水流模拟的性能评估结果表明，中到大流域尺度和5-8月期间具有较高的一致性。对不同卫星产品的量规调整可以减小它们的误差幅度，并增加它们与参考降水和径流模拟的相关性。此外，..。
AbstractThis study investigates the error characteristics of six quasi-global satellite precipitation products and their error propagation in flow simulations for a range of mountainous basin scales (255–6967 km2) and two different periods (May–August and September–November) in northeast Italy. Statistics describing the systematic and random error, the temporal similarity, and error ratios between precipitation and runoff are presented. Overall, strong over-/underestimation associated with the near-real-time 3B42/Climate Prediction Center morphing technique (CMORPH) products is shown. Results suggest positive correlation between the systematic error and basin elevation. Performance evaluation of flow simulations yields a higher degree of consistency for the moderate to large basin scales and the May–August period. Gauge adjustment for the different satellite products is shown to moderate their error magnitude and increase their correlation with reference precipitation and streamflow simulations. Moreover,...