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大气科学  2002 

卫星亮温资料四维同化方案及其对"7·20"武汉特大暴雨的模拟试验

DOI: 10.3878/j.issn.1006-9895.2002.05.07

Keywords: 云顶温度,四维资料同化,暴雨

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Abstract:

作者首次把与云参数相关的云顶亮温(TBB)资料直接用于中尺度模式MM5V2的牛顿张驰逼近(nudging)四维同化过程,提出了一种通过分析场的nudging四维同化来确定云顶高度的方法,并利用1h间隔的TBB-nudging方案成功地模拟了"7@20"武汉大暴雨过程.TBB-nudging试验的模拟结果表明对流层低层中尺度低涡和低空西南急流是"7@20"大暴雨的主要影响系统,这预示着把卫星遥感资料(例如TBB等)用于中尺度模式的同化过程有可能提高中尺度暴雨的预报能力.

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