东北冷涡过程的能量学分析

被引:14
作者
毛贤敏
曲晓波
机构
[1] 沈阳中心气象台
关键词
冷涡,能量平衡,涡动动能;
D O I
暂无
中图分类号
P433 [大气动力学];
学科分类号
0706 ; 070601 ;
摘要
对一次较典型的东北冷涡过程作了能量学分析。结果表明,冷涡涡动动能的主要收入来自涡动位能的转换(Ae→Ke)。在冷涡发展期,由外边界强气流入侵所产生的动能输入也十分重要。涡动动能的支出主要是转换为纬向气流的动能,即Ke→Kz,其次是消耗项和成熟期以后的边界动能输出。冷涡过程涡动动能变化的绝对值以中、高空为大,但相对变率却远小于低空。Ae→Ke主要发生在700—300hPa中空,高空则为Ke→Ae的转换
引用
收藏
页码:103 / 111
页数:9
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