摘要
以前关于大气运动动能在边界层中耗散的研究主要限于水平均匀地转风场的情况,本文用半地转大气边界层模式研究了非均匀非定常地转风场,亦即不同气压系统中的边界层动能耗散,得到了相应的理论公式.得到了在相同地转风速下,气旋及槽等正地转涡度系统中动能耗散低于反气旋及脊等负地转涡度系统中等结论.所得公式可应用于大尺度模式以计算动能耗散.
The previous research on the dissipation of atmospheric kinetic energy in the boundary layer was mainly restricted in the horizontally homogeneous geostrophic wind field.In this paper,we study the dissipation of kinetic energy in the conditions of nonstationay and inhomogeneous geostrophic wind field,or in different pressure systems, by using semi-geostrophic atmospheric bonndary layer model.As a result,the corre- sponding theoretical formulas are derived.We have drawn some conclusions,for example, the dissipation in the positive geostrophic vorticity systems such as cyclone and trough is lower than that in the negative vorticlty systems such as anticyclone and ridge when the geostrophic wind speeds are the same.The derived formulas may be applied to large-scale models to calculate the kinetic energy dissipation.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1992年第1期126-136,共11页
Journal of Nanjing University（Natural Science）
基金
国家自然科学基金
关键词
半地转
大气边界层
动能耗散
semi-geostrophic
atmospheric bundary layer
kinetic energy dissipation
