Comparison of TAMSAT and CPC rainfall estimates with raingauges, for southern Africa
Comparison of TAMSAT and CPC rainfall estimates with raingauges, for southern Africa
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南部非洲 TAMSAT 和 CPC 降雨量估算值与雨量计的比较
DOI：
10.1080/01431160118816
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发表时间：
2001
影响因子：
3.4
通讯作者：
G. Dugdale
中科院分区：
文献类型：
--
作者：
V. Thorne;P. Coakeley;D. Grimes;G. Dugdale
根据气象卫星图像，为北方和南部非洲开发了两种不同的TAMSAT（气象卫星热带应用）降雨量估算方法。这两种方法被用来估计1995年10月至1996年4月南部雨季的降雨量。然后将TAMSAT方法和CPC（气候预测中心）方法得出的估计数与南部非洲800多个雨量计的克里格数据进行了比较。这表明，TAMSAT业务估计在高原地区更好，59%的估计在一个标准误差（s.e.）内。克里金降雨量。在山区，CPC方法通常更好，尽管所有方法都低估了，并且在1 s.e.内仅给出40%的估计值。两种TAMSAT方法在整个季节中显示出很小的差异，但当仔细观察时，北方方法给出的校准结果并不令人满意。CPC方法通过建立实时雨量计数据确实有显着的整体改进，但仅在有足够雨量计的情况下。
Two different TAMSAT (Tropical Applications of Meteorological Satellites) methods of rainfall estimation were developed for northern and southern Africa, based on Meteosat images. These two methods were used to make rainfall estimates for the southern rainy season from October 1995 to April 1996. Estimates produced by both TAMSAT methods and estimates produced by the CPC (Climate Prediction Center) method were then compared with kriged data from over 800 raingauges in southern Africa. This shows that operational TAMSAT estimates are better over plateau regions, with 59% of estimates within one standard error (s.e.) of the kriged rainfall. Over mountainous regions the CPC approach is generally better, although all methods underestimate and give only 40% of estimates within 1 s.e. The two TAMSAT methods show little difference across a whole season, but when looked at in detail the northern method gives unsatisfactory calibrations. The CPC method does have significant overall improvements by building in real-time raingauge data, but only where sufficient raingauges are available.