Turbulent Mechanical Energy Budget in Stably Stratified Baroclinic Flows over Sloping Terrain

被引：7

作者：

Lobocki, Lech ^{[1
]}

机构：

[1] Warsaw Univ Technol, Fac Bldg Serv Hydro & Environm Engn, Nowowiejska 20, PL-00653 Warsaw, Poland

来源：

BOUNDARY-LAYER METEOROLOGY | 2017年 / 164卷 / 03期

关键词：

Baroclinicity; Complex terrain; Slope flows; Static stability; Turbulence; CLOSURE-MODEL; FLUX; SIMULATION; GRAVITY; SLOPES; WAVES;

D O I：

10.1007/s10546-017-0251-4

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Analysis of second-moment budget equations in a slope-oriented coordinate frame exhibits the pathways of exchange between the potential energy of mean flow and the total turbulent mechanical energy. It is shown that this process is controlled by the inclination of the potential temperature gradient. Hence, this parameter should be considered in studies of turbulence in slope flows as well as the slope inclination. The concept of turbulent potential energy is generalized to include baroclinicity, and is used to explain the role of along-slope turbulent heat flux in energy conversions. A generalization of static stability criteria for baroclinic conditions is also proposed. In addition, the presence of feedback between the turbulent heat flux and the temperature variance in stably-stratified flows is identified, which implies the existence of oscillatory modes characterized by the Brunt-Vaisala frequency.

引用

页码：353 / 365

页数：13

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