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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >PRECIPITATION CHARACTERISTICS IN GREENLAND-ICELAND-NORWEGIAN SEAS DETERMINED BY USING SATELLITE MICROWAVE DATA
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PRECIPITATION CHARACTERISTICS IN GREENLAND-ICELAND-NORWEGIAN SEAS DETERMINED BY USING SATELLITE MICROWAVE DATA

机译：卫星微波数据确定的格陵兰-冰岛-挪威海域降水特征

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摘要

Precipitation characteristics and their connection with atmospheric conditions are studied for the Greenland-Iceland-Norwegian (GIN) Seas during wintertime using satellite microwave (Special Sensor Microwave/Imager) and SSM/T2 data. A snowfall algorithm using SSM/T2 data is presented, which makes it possible to estimate the total precipitation and the relative contribution of each precipitation component (rain or snow) over open water. The monthly mean snowfall rate distribution compares well with the snowfall frequency derived from shipboard present weather reports although no data are available for direct snowfall rate validation. The retrieved results show that more than half of the precipitation falls as snow in the GIN Seas during winter and that the monthly mean horizontal distributions of rain and snow have different patterns. By examining the relationship between surface wind and precipitation and conducting case studies, it is found that rainfall and snowfall are associated with different weather types: rainfall occurs mainly in low pressure systems, while snowfall is more likely associated with cold air outbreaks. [References: 27]
机译：利用卫星微波（特殊传感器微波/成像仪）和SSM / T2数据，研究了格陵兰-冰岛-挪威（GIN）冬季的降水特征及其与大气条件的关系。提出了一种使用SSM / T2数据的降雪算法，该算法可以估算总降水量以及每种降水成分（雨或雪）在开放水域上的相对贡献。尽管尚无直接降雪率验证的数据，但月平均降雪率分布与从船上当前天气报告得出的降雪频率比较好。取回的结果表明，冬季GIN海中有一半以上的降水是降雪，而雨雪的月平均水平分布具有不同的模式。通过检查地表风与降水之间的关系并进行案例研究，发现降雨和降雪与不同的天气类型有关：降雨主要发生在低压系统中，而降雪更可能与冷空气爆发有关。 [参考：27]

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