东北冷涡过程的能量学分析

毛贤敏; 曲晓波

doi:10.11676/qxxb1997.024

东北冷涡过程的能量学分析

毛贤敏¹,
曲晓波¹

沈阳中心气象台, 沈阳, 110015

基金项目:

中国气象局《东北冷涡研究》课题

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出版历程
- 收稿日期: 1994-08-31
- 修回日期: 1995-10-11
- 发布日期: 2013-02-19

ENERGETICS ANALYSIS OF A COLD VORTEX IN NORTHEAST CHINA

Mao Xianmin¹,
Qu Xiaobo¹

Shenyang central Meteorological Observatory, Shenyang, 110015

摘要

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。
- 冷涡 /
- 能量平衡 /
- 涡动动能
Abstract: An analysis of the energetics of a cold vortex in Northeast China is performed. The approach is based on the computation of anenergy flow for and open at mosphericregion in which this cold vortex is the major synoptic-scale feature. Following results have been obtained. The conversionterm Ae→Ke acts as a main source of the eddy kinetic energy of the cold vortex. When the coldvortex is in developing period, the boundary inflow of the eddy kinetic enery is also important. The major sink of the eddy kindtic energy is Ke →Kz, the Re and the boundary out flow after the mature stage of the cold vortex are the secondary important. The absolute value of the change of the eddy kinetic energy in the middle and upper tropo sphere is larger than that in the lower tropo sphere layer, but the result is contrary to the relative variability. The Ae→Ke occured mainly in the 700-300hPa, the contrary conversion from Ke occured mainly in the 700-300hPa, the contrary conversion form Ke into Ae is appeared in the upper at mosphere above 300hPa.
- Cold vortex /
- Energy balance /
- Eddy kinetic energy

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