Rainfall Measurements During Hurricane Agnes by Three Overlapping Radars
Rainfall Measurements During Hurricane Agnes by Three Overlapping Radars
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DOI：
10.1175/1520-0450(1974)013
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发表时间：
1974-12
期刊：
影响因子：
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通讯作者：
James W. Wilson;D. Pollock
中科院分区：
文献类型：
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作者：
James W. Wilson;D. Pollock
摘要作为五大湖国际野外年的一部分，用两部C波段雷达和一部S雷达对安大略湖流域上空的飓风艾格尼丝进行了降雨量测量。两个密集的雨量网络位于雷达重叠区域。其中一个网络包含一个雨滴滴度计，用于测量雨滴的数量和大小。雷达雨量测量与GAGE雨量测量的比较表明，雷达雨量估算的精度在时间和空间上都有相当大的变化。由于同一地区测雨雷达之间的相关性很强，因此可以认为这种观测变化是气象原因造成的，而不是雷达测量误差造成的。视盘测量仪测量的Z-R关系在整个风暴过程中保持不变；因此，雷达精度的变化不太可能是Z-R关系的变化造成的。一些较大的雷达高估可能归因于雷达以下的蒸发是...
Abstract As part of the International Field Year for the Great Lakes, rainfall measurements were made for hurricane Agnes over the Lake Ontario watershed by two C-band radars and one S-band radar. Two dense networks of raingages were located in radar overlap areas. One of the networks contained a raindrop disdrometer for measuring the number and size of drops. Comparison between radar and gage rainfall measurements show there is considerable time and space variability in the accuracy of the radar rainfall estimates. Because of the high correlation between radars measuring rain over the same area, it is concluded that this observed variability is due to meteorological causes rather than radar measurement errors. The Z-R relationship as measured by the disdrometer remained constant throughout the storm; thus, it is improbable that the variability in the radar accuracies resulted from changes in the Z-R relationship. Some of the larger radar overestimates could be attributed to evaporation below the radar be...