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Numerical and the Mu Radar Estimations of Gravity Wave Enhancement and Turbulent Ozone Fluxes Near the Tropopause : Volume 22, Issue 11 (29/11/2004)

By Gavrilov, N. M.

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Book Id: WPLBN0003985571
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Numerical and the Mu Radar Estimations of Gravity Wave Enhancement and Turbulent Ozone Fluxes Near the Tropopause : Volume 22, Issue 11 (29/11/2004)  
Author: Gavrilov, N. M.
Volume: Vol. 22, Issue 11
Language: English
Subject: Science, Annales, Geophysicae
Collection: Periodicals: Journal and Magazine Collection
Subcollection: Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description: Saint-Petersburg State University, Atmospheric Physics Department, Petrodvorets, 198 504, St. Petersburg, Russia. It is shown with a numerical simulation that a sharp increase in the vertical temperature gradient and Brunt-Väisälä frequency near the tropopause may produce an increase in the amplitudes of internal gravity waves (IGWs) propagating upward from the troposphere, wave breaking and generation of stronger turbulence. This may enhance the transport of admixtures between the troposphere and stratosphere in the middle latitudes. Turbulent diffusion coefficient calculated numerically and measured with the MU radar are of 1-10m2/s in different seasons in Shigaraki, Japan (35° N, 136° E). These values lead to the estimation of vertical ozone flux from the stratosphere to the troposphere of (1-10)x1014, which may substantially add to the usually supposed ozone downward transport with the general atmospheric circulation. Therefore, local enhancements of IGW intensity and turbulence at tropospheric altitudes over mountains due to their orographic excitation and due to other wave sources may lead to the changes in tropospheric and total ozone over different regions.

Numerical and the MU radar estimations of gravity wave enhancement and turbulent ozone fluxes near the tropopause


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