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大气科学  2005 

一次强雷雨过程中对流参数对潜势预测影响的分析

DOI: 10.3878/j.issn.1006-9895.2005.04.05

Keywords: 特大暴雨,梅雨锋,对流参数

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Abstract:

在利用观测资料和1°×1°NCEP再分析资料对2003年7月4~5日的一次强雷雨过程的天气形势、暴雨特征分析基础上,从雷暴和强暴雨的发生条件入手,探讨了一些强对流参数的物理意义、计算方法及其在此次强雷雨发生潜势预测中的指示意义.结果表明:始终稳定维持在乌拉尔山、鄂霍茨克附近的高压脊为此次强雷雨提供了有利的环流背景;来自孟加拉湾、印度洋一带和南海地区的暖湿气流与南下的冷空气在淮河流域交汇,并形成一条东西向稳定的梅雨锋;梅雨锋及其上发生发展的中尺度扰动是此次强降雨的主要制造者;对流有效位能[Con

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