Turbulent Mechanical Energy Budget in Stably Stratified Baroclinic Flows over Sloping TerrainReportar como inadecuado




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Boundary-Layer Meteorology

pp 1–13

First Online: 27 April 2017Received: 26 July 2016Accepted: 11 April 2017DOI: 10.1007-s10546-017-0251-4

Cite this article as: Łobocki, L. Boundary-Layer Meteorol 2017. doi:10.1007-s10546-017-0251-4

Abstract

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–Väisäla frequency.

KeywordsBaroclinicity Complex terrain Slope flows Static stability Turbulence 



Autor: Lech Łobocki

Fuente: https://link.springer.com/







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