Gridsize induced error in the discretization of exchange processes at the tropopause

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1. Verfasser:	M. Fiebig-Wittmaack
Format:	Artículo científico
Sprache:	en
Veröffentlicht:	Universidad Nacional Autónoma de México 2005
Schlagworte:	Biología discretization errors Global tracer transport model tropopause discontinuity jumps finite differences discretization scheme
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author	M. Fiebig-Wittmaack
author_facet	M. Fiebig-Wittmaack
contents	Gridsize induced error in the discretization of exchange processes at the tropopause M. Fiebig-Wittmaack Biología discretization errors Global tracer transport model tropopause discontinuity jumps finite differences discretization scheme We study the accuracy of the finite differences discretization scheme for a 2-D simplified model of globaltracer transport, in the case that the diffusion coefficients relating flux to the gradient of the mixing ratio havediscontinuity jumps at the tropopause. We analyze the conventional box method for a typical downward flowwith chemical reaction and for a typical upward flow, comparing the approximations of the solutions, fordifferent discretization gridsizes. It turns out that the jumps may introduce remarkable errors in the discretesolutions, in the case of a typical downward flow; these errors propagate mainly into the troposphere. Anoticeable improvement is achieved by reducing the gridsize. However, a typical upward flow is ratherinsensitive to the chosen gridsizes. 2005 artículo científico 0187-6236 https://www.redalyc.org/articulo.oa?id=56518302 en http://www.redalyc.org/revista.oa?id=565 Atmósfera application/pdf Universidad Nacional Autónoma de México Atmósfera (México) Num.3 Vol.18
format	Artículo científico
id	redalyc_56518302
language	en
publishDate	2005
publisher	Universidad Nacional Autónoma de México
spellingShingle	Gridsize induced error in the discretization of exchange processes at the tropopause M. Fiebig-Wittmaack Biología discretization errors Global tracer transport model tropopause discontinuity jumps finite differences discretization scheme Gridsize induced error in the discretization of exchange processes at the tropopause M. Fiebig-Wittmaack Biología discretization errors Global tracer transport model tropopause discontinuity jumps finite differences discretization scheme We study the accuracy of the finite differences discretization scheme for a 2-D simplified model of globaltracer transport, in the case that the diffusion coefficients relating flux to the gradient of the mixing ratio havediscontinuity jumps at the tropopause. We analyze the conventional box method for a typical downward flowwith chemical reaction and for a typical upward flow, comparing the approximations of the solutions, fordifferent discretization gridsizes. It turns out that the jumps may introduce remarkable errors in the discretesolutions, in the case of a typical downward flow; these errors propagate mainly into the troposphere. Anoticeable improvement is achieved by reducing the gridsize. However, a typical upward flow is ratherinsensitive to the chosen gridsizes. 2005 artículo científico 0187-6236 https://www.redalyc.org/articulo.oa?id=56518302 en http://www.redalyc.org/revista.oa?id=565 Atmósfera application/pdf Universidad Nacional Autónoma de México Atmósfera (México) Num.3 Vol.18
title	Gridsize induced error in the discretization of exchange processes at the tropopause
topic	Biología discretization errors Global tracer transport model tropopause discontinuity jumps finite differences discretization scheme
url	https://www.redalyc.org/articulo.oa?id=56518302

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