摘要
本文通过对1982年7月25—28日低槽在高原上发展、南伸和1982年6月4—6日高原切变线活动过程动能收支的对比分析发现:这两种过程动能的主要来源是由有效位能转换为动能,且在低槽南伸发展和切变线维持时转换量最大;而此时位能水平通量辐散消耗动能最明显。它们的主要差异是:切变线活动区域平均动能比低槽的大;在切变线形成时能源项制造动能,而在低槽南伸发展时,能源项是消耗动能的。
The kinetic energy budget for a developing trough and a shear line over the Qinghai-Xizang Plateau, which occurred respectively in the period from 25 to 28 July 1982 and from 4 to 6 June 1982, had been studied by the diagnostic analysis. The same features are: (1) there is a process of transformation from effective potential energy into kinetic energy, and the maximum value of kinitic energy transformed appears when the trough is developing and extending southwards and the shear line is stabilizing. (2) The kinetic energy is decreased by divergence of the flux of potential energy is most obvious when the trough is developing and the shear line is stabilizing.
The different features are: (1) the value of kinetic energy in shear zone is larger than that in trough zone. (2) The kinetic energy is increased by the term of energy source when the shear line forming, and the kinetic energy is decreased by the term of energy source when the trough developing.
出处
《高原气象》
CSCD
北大核心
1993年第3期251-256,共6页
Plateau Meteorology
关键词
动能收支
低槽
切变线
青藏高原
The kinetic energy budget
Trough
Shear line.
