Dynamic effects of steep orography on cold front propagation in a stratified atmosphere

M. S. Yudin

doi:10.1117/12.2205225

19 November 2015 Dynamic effects of steep orography on cold front propagation in a stratified atmosphere

M. S. Yudin

Author Affiliations +

Proceedings Volume 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics; 96805M (2015) https://doi.org/10.1117/12.2205225
Event: XXI International Symposium Atmospheric and Ocean Optics. Atmospheric Physics, 2015, Tomsk, Russian Federation

Abstract

The present study is an extension of [3].It deals with calculation and comparison of velocities of gravitational currents over steep terrain in a stratified atmosphere. The propagation of a cold atmospheric front over orographic obstacles of various shapes is simulated with a 2D small-scale meteorological finite-element model. The front surface is explicitly described by a special equation. A time filter is used to suppress the non-physical oscillations. The effects of flow retardation and near surface blocking under steep orography are estimated. The upwind and downwind velocities calculated for typical values of the orography and stratification parameters are presented.

Citation Download Citation

M. S. Yudin, M. S. Yudin, } "Dynamic effects of steep orography on cold front propagation in a stratified atmosphere ", Proc. SPIE 9680, 21st International Symposium Atmospheric and Ocean Optics: Atmospheric Physics, 96805M (19 November 2015); doi: 10.1117/12.2205225; https://doi.org/10.1117/12.2205225

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