dc.identifier.uri |
http://dx.doi.org/10.15488/735 |
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dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/759 |
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dc.contributor.author |
Heinze, Rieke
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|
dc.contributor.author |
Mironov, Dmitrii
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dc.contributor.author |
Raasch, Siegfried
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dc.date.accessioned |
2016-11-25T08:33:30Z |
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dc.date.available |
2016-11-25T08:33:30Z |
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dc.date.issued |
2016 |
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dc.identifier.citation |
Heinze, Rieke; Mironov, D.; Raasch, Siegfried: Analysis of pressure-strain and pressure gradient-scalar covariances in cloud-topped boundary layers: A large-eddy simulation study. In: Journal of Advances in Modeling Earth Systems 8 (2016), Nr. 1, S. 3-30. DOI: http://dx.doi.org/10.1002/2015MS000508 |
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dc.description.abstract |
A detailed analysis of the pressure-scrambling terms (i.e., the pressure-strain and pressure gradient-scalar covariances) in the Reynolds-stress and scalar-flux budgets for cloud-topped boundary layers (CTBLs) is performed using high-resolution large-eddy simulation (LES). Two CTBLs are simulated — one with trade wind shallow cumuli, and the other with nocturnal marine stratocumuli. The pressure-scrambling terms are decomposed into contributions due to turbulence-turbulence interactions, mean velocity shear, buoyancy, and Coriolis effects. Commonly used models of these contributions, including a simple linear model most often used in geophysical applications and a more sophisticated two-component-limit (TCL) nonlinear model, are tested against the LES data. The decomposition of the pressure-scrambling terms shows that the turbulence-turbulence and buoyancy contributions are most significant for cloud-topped boundary layers. The Coriolis contribution is negligible. The shear contribution is generally of minor importance inside the cloudy layers, but it is the leading-order contribution near the surface. A comparison of models of the pressure-scrambling terms with the LES data suggests that the more complex TCL model is superior to the simple linear model only for a few contributions. The linear model is able to reproduce the principal features of the pressure-scrambling terms reasonably well. It can be applied in the second-order turbulence modeling of cloud-topped boundary layer flows, provided some uncertainties are tolerated. |
eng |
dc.description.sponsorship |
Deutscher Wetterdienst |
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dc.description.sponsorship |
European Commission/COST Action ES0905 |
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dc.language.iso |
eng |
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dc.publisher |
Hoboken, NJ : Blackwell Publishing Ltd |
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dc.relation.ispartofseries |
Journal of Advances in Modeling Earth Systems 8 (2016), Nr. 1 |
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dc.rights |
CC BY-NC-ND 4.0 Unported |
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dc.rights.uri |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
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dc.subject |
cloud-topped boundary layers |
eng |
dc.subject |
large-eddy simulation |
eng |
dc.subject |
parameterizations |
eng |
dc.subject |
pressure-scrambling terms |
eng |
dc.subject |
second-order turbulence modeling |
eng |
dc.subject |
Atmospheric thermodynamics |
eng |
dc.subject |
Boundary layer flow |
eng |
dc.subject |
Boundary layers |
eng |
dc.subject |
Budget control |
eng |
dc.subject |
Buoyancy |
eng |
dc.subject |
Pressure gradient |
eng |
dc.subject |
Reynolds equation |
eng |
dc.subject |
Reynolds number |
eng |
dc.subject |
Shear flow |
eng |
dc.subject |
Turbulence |
eng |
dc.subject |
Uncertainty analysis |
eng |
dc.subject |
Cloud-topped boundary layer |
eng |
dc.subject |
Comparison of models |
eng |
dc.subject.ddc |
550 | Geowissenschaften
|
ger |
dc.title |
Analysis of pressure-strain and pressure gradient-scalar covariances in cloud-topped boundary layers: A large-eddy simulation study |
eng |
dc.type |
Article |
|
dc.type |
Text |
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dc.relation.issn |
1942-2466 |
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dc.relation.doi |
http://dx.doi.org/10.1002/2015MS000508 |
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dc.bibliographicCitation.issue |
1 |
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dc.bibliographicCitation.volume |
8 |
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dc.bibliographicCitation.firstPage |
3 |
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dc.bibliographicCitation.lastPage |
30 |
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dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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