[Accuracy evaluation of multi-satellite precipitation products over Circum-Bohai-Sea Region.]
[Accuracy evaluation of multi-satellite precipitation products over Circum-Bohai-Sea Region.]
复制标题
环渤海地区多卫星降水产品精度评估。
DOI：
10.13287/j.1001-9332.201609.035
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
De Juan Jiang
中科院分区：
文献类型：
--
作者：
Rui Ze Li;An Ding Zhang;Hua Zhang;De Juan Jiang
降水是全球能源和水循环的关键变量。降水数据的准确性对于洪水和干旱的监测和预报以及水资源管理至关重要。基于1998-2014年环渤海地区55个气象站逐日降水资料，对TRMM 3B42 V7、CMORPH、PERSIANN 3种星基降水产品从日到月尺度的精度进行了评价和比较。他们在不同季节的错误被量化。结果表明，总体而言，TRMM 3B42 V7 的性能最好，而 PERSIANN 的误差最大。然而，CMORPH 的降雨事件检出率最高。 3B42 V7 略微高估了降雨量，但 CMORPH 和 PERSIANN 低估了降雨量。从季节上看，夏季的技能得分高于其他季节，而冬季的捕捉能力则低得多。同时，相关系数和均方根误差随季节变化。 3个星基降水产品性能由日尺度提升至月尺度。逐日降雨量估算仍存在较大误差，特别是暴雨被严重低估。本研究为卫星降水产品在降水估算中的应用以及环渤海地区气候水文模拟中的应用提供了依据。
Precipitation is a key variable of the global energy and water cycle. The accuracy of precipitation data is essential for monitoring and forecasting flood and drought, as well as water resources management. Based on daily precipitation data of 55 meteorological stations over Circum-Bohai-Sea region during 1998-2014, the accuracy was evaluated and compared among 3 satellite-based precipitation products, i.e., TRMM 3B42 V7, CMORPH, and PERSIANN from daily to monthly scale. Their errors were quantified for different seasons. Results showed that generally, TRMM 3B42 V7 had the best performance while PERSIANN had the largest error. However, CMORPH had the highest detection rate of rainfall events. The rainfall was slightly overestimated by 3B42 V7 but underestimated by CMORPH and PERSIANN. Seasonally, the skill score in summer was higher than that in other seasons, and the capturing capability was much lower in winter. Meanwhile, the correlation coefficient and root mean square error varied with seasons. The performance of 3 satellite-based precipitation products increased from the daily to monthly scale. Larger errors still existed in the daily rainfall estimates, and especially the rainstorm was seriously underestimated. This study provided a basis for the use of satellite precipitation products in precipitation estimation and its application in climate and hydrological simulation over Circum-Bohai-Sea region.