Validation of high-resolution satellite rainfall products over complex terrain
Validation of high-resolution satellite rainfall products over complex terrain
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DOI：
10.1080/01431160701772526
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发表时间：
2008-01-01
影响因子：
3.4
通讯作者：
Ropelewski, C. F.
中科院分区：
文献类型：
--
作者：
Dinku, T.;Chidzambwa, S.;Ropelewski, C. F.
使用位于非洲两个不同地区的站点网络评估每日累积和 0.25 度空间分辨率的高分辨率卫星降雨产品。第一个地点位于埃塞俄比亚上空，地形非常复杂。第二个地点位于津巴布韦上空，地形不太崎岖。评估的卫星降雨产品有NOAA-CPC非洲降雨估算算法（RFE）、TRMM-3B42、CPC变形技术（CMORPH）、PERSIANN和海军研究实验室的混合产品。这些产品在检测降雨发生方面在这两个地区都表现良好。然而，在估计每个像素的降雨量方面性能较差。相关系数低，随机误差高。与埃塞俄比亚相比，津巴布韦的表现更好。比较不同产品，CMORPH和TRMM-3B42的表现优于埃塞俄比亚，而RFE、CMORPH和TRMM-3B42的表现相对优于津巴布韦。
High-resolution satellite rainfall products, at daily accumulation and 0.25 degrees spatial resolution, are evaluated using station networks located over two different parts of Africa. The first site is located over Ethiopia with a very complex terrain. The second site, located over Zimbabwe, has a less rugged topography. The evaluated satellite rainfall products are the NOAA-CPC African rainfall estimation algorithm (RFE), TRMM-3B42, the CPC morphing technique (CMORPH), PERSIANN, and the Naval Research Laboratory's blended product. These products perform reasonably well over both regions in detecting the occurrence of rainfall. However, performances are poor in estimating the amount of rainfall in each pixel. The correlation coefficients are low and random errors high. The performance was better over Zimbabwe as compared with Ethiopia. Comparing the different products, CMORPH and TRMM-3B42 showed a better performance over Ethiopia, while RFE, CMORPH, and TRMM-3B42 preformed relatively better over Zimbabwe.