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Article information
2006 , Volume 11, Special issue, p.112-117
Kostrykin S.V., Schmitz G.
Calculation of the effective diffusivity in the middle atmosphere using a general atmospheric circulation model
The mixing of a passive tracer in the stratosphere and lower mesosphere is studied on the basis of the coefficient of effective diffusion (CED). In 2D-case this coefficient is analogous to the usual diffusivity, but for the corresponding quantities averaged over contour of constant tracer concentration. The CED distribution is completely defined from the tracer distribution. The data time series describing the evolution of the tracer on the isentropic surfaces was obtained by solving the advection-diffusion equation. We only use the non-divergent isentropic component of wind field, which is obtained after 6-year run of the Middle Atmosphere Global Climate Model of INM RAS. Some results of CED distribution are discussed on the basis of the homogenisation theory and effects of Rossby wave generation and breaking in atmospheric currents.
[full text] Author(s):
Kostrykin Sergey Vladimirovich
PhD.
Position: person working for doctors degree
Office: Institute of Numerical Mathematics RAS
Address: 119991, Russia, Moscow, ul. Gubkina, 8.
Phone Office: (095) 938 37 72
E-mail: kostr@inm.ras.ru
Schmitz Gerhard
Professor
Position: Professor
Office: Leibniz-Institut fuer Atmospaerenphysik e.V. an der Universitaet Rostock
Address: Germany, Kuehlungsborn, Moscow, ul. Gubkina, 8.
E-mail: schmitz@iap-kborn.de
Bibliography link:
Kostrykin S.V., Schmitz G. Calculation of the effective diffusivity in the middle atmosphere using a general atmospheric circulation model // Computational technologies. 2006. V. 11. Special issue. P. 112-117
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