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A total turbulent energy closure model for neutral and stably stratified atmospheric boundary layers
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2007 (English)In: Journal of the Atmospheric Sciences, Vol. 64, 4113-4126 p.Article in journal (Refereed) Published
Abstract [en]

This paper presents a turbulence closure for neutral and stratified atmospheric conditions. The closure is based on the concept of the total turbulent energy. The total turbulent energy is the sum of the turbulent kinetic energy and turbulent potential energy, which is proportional to the potential temperature variance. The closure uses recent observational findings to take into account the mean flow stability. These observations indicate that turbulent transfer of heat and momentum behaves differently under very stable stratification. Whereas the turbulent heat flux tends toward zero beyond a certain stability limit, the turbulent stress stays finite. The suggested scheme avoids the problem of self-correlation. The latter is an improvement over the widely used Monin–Obukhov-based closures. Numerous large-eddy simulations, including a wide range of neutral and stably stratified cases, are used to estimate likely values of two free constants. In a benchmark case the new turbulence closure performs indistinguishably from independent large-eddy simulations.

Place, publisher, year, edition, pages
2007. Vol. 64, 4113-4126 p.
Keyword [en]
turbulent closure scheme, atmospheric boundary layers, Arctic
Research subject
SWEDARCTIC
Identifiers
URN: urn:nbn:se:polar:diva-1194OAI: oai:DiVA.org:polar-1194DiVA: diva2:569330
Note

Source: Polardok by Swedish Polar Research Secretariat

Available from: 2012-11-15 Created: 2012-11-15 Last updated: 2015-06-15

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
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  • asciidoc
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