Some aspects of the energy balance closure problem

After briefly discussing several reasons for the energy balance closure problem in the surface layer, the paper focuses on the influence of the low frequency part of the turbulence spectrum on the residual. Changes in the turbulent fluxes in this part of the turbulence spectrum were found to have a...

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Main Authors:	T. Foken, F. Wimmer, M. Mauder, C. Thomas, C. Liebethal
Format:	Article
Language:	English
Published:	Copernicus Publications 2006-01-01
Series:	Atmospheric Chemistry and Physics
Online Access:	http://www.atmos-chem-phys.net/6/4395/2006/acp-6-4395-2006.pdf

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spelling	doaj-87fa327952a44c198afc466ecf5586cc2020-11-24T23:23:14ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242006-01-0161243954402Some aspects of the energy balance closure problemT. FokenF. WimmerM. MauderC. ThomasC. LiebethalAfter briefly discussing several reasons for the energy balance closure problem in the surface layer, the paper focuses on the influence of the low frequency part of the turbulence spectrum on the residual. Changes in the turbulent fluxes in this part of the turbulence spectrum were found to have a significant influence on the changes of the residual. Using the ogive method, it was found that the eddy-covariance method underestimates turbulent fluxes in the case of ogives converging for measuring times longer than the typical averaging interval of 30 min. Additionally, the eddy-covariance method underestimates turbulent fluxes for maximal ogive functions within the averaging interval, both mainly due to advection and non-steady state conditions. This has a considerable influence on the use of the eddy-covariance method.http://www.atmos-chem-phys.net/6/4395/2006/acp-6-4395-2006.pdf
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	T. Foken F. Wimmer M. Mauder C. Thomas C. Liebethal
spellingShingle	T. Foken F. Wimmer M. Mauder C. Thomas C. Liebethal Some aspects of the energy balance closure problem Atmospheric Chemistry and Physics
author_facet	T. Foken F. Wimmer M. Mauder C. Thomas C. Liebethal
author_sort	T. Foken
title	Some aspects of the energy balance closure problem
title_short	Some aspects of the energy balance closure problem
title_full	Some aspects of the energy balance closure problem
title_fullStr	Some aspects of the energy balance closure problem
title_full_unstemmed	Some aspects of the energy balance closure problem
title_sort	some aspects of the energy balance closure problem
publisher	Copernicus Publications
series	Atmospheric Chemistry and Physics
issn	1680-7316 1680-7324
publishDate	2006-01-01
description	After briefly discussing several reasons for the energy balance closure problem in the surface layer, the paper focuses on the influence of the low frequency part of the turbulence spectrum on the residual. Changes in the turbulent fluxes in this part of the turbulence spectrum were found to have a significant influence on the changes of the residual. Using the ogive method, it was found that the eddy-covariance method underestimates turbulent fluxes in the case of ogives converging for measuring times longer than the typical averaging interval of 30 min. Additionally, the eddy-covariance method underestimates turbulent fluxes for maximal ogive functions within the averaging interval, both mainly due to advection and non-steady state conditions. This has a considerable influence on the use of the eddy-covariance method.
url	http://www.atmos-chem-phys.net/6/4395/2006/acp-6-4395-2006.pdf
work_keys_str_mv	AT tfoken someaspectsoftheenergybalanceclosureproblem AT fwimmer someaspectsoftheenergybalanceclosureproblem AT mmauder someaspectsoftheenergybalanceclosureproblem AT cthomas someaspectsoftheenergybalanceclosureproblem AT cliebethal someaspectsoftheenergybalanceclosureproblem
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Some aspects of the energy balance closure problem

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