2019
DOI: 10.1029/2018ms001600
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Regional Superparameterization in a Global Circulation Model Using Large Eddy Simulations

Abstract: As a computationally attractive alternative for global large eddy simulations (LESs), we investigate the possibility of using comprehensive three-dimensional LESs as a superparameterization that can replace all traditional parameterizations of atmospheric processes that are currently used in global models. We present the technical design for a replacement of the parameterization for clouds, convection, and turbulence of the global atmospheric model of the European Centre for Medium-Range Weather Forecasts by t… Show more

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Cited by 30 publications
(36 citation statements)
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“…The model settings, the initial state and the large-scale tendencies together define a case. The initial profiles and large-scale tendencies can be obtained from other models on a larger scale [14,[21][22][23] or be constructed from observations, e.g. during a field campaign, as in our case which is described below.…”
Section: Model and Implementationmentioning
confidence: 99%
“…The model settings, the initial state and the large-scale tendencies together define a case. The initial profiles and large-scale tendencies can be obtained from other models on a larger scale [14,[21][22][23] or be constructed from observations, e.g. during a field campaign, as in our case which is described below.…”
Section: Model and Implementationmentioning
confidence: 99%
“…A similar regional superparameterization approach using LES has recently been explored for the cloud problem (Jansson et al, 2019). Aside from the focus on OSBL turbulence, our approach also differs from theirs by a more tightly integrated coupling framework and the GPU acceleration of the embeded LES (see Section 2 for more details).…”
Section: A Multiscale Modeling Frameworkmentioning
confidence: 99%
“…A computationally very expensive approach to improve parameterizations and reduce uncertainty is by locally replacing the parameterization with a highresolution simulation. In [16] this is applied regionally, by nesting the Dutch Atmospheric Large-Eddy Simulation (DALES) model in a selected number of global model columns, replacing the convection parameterization in these columns. The local DALES models run independently from each other and only exchange mean profiles with the global model.…”
Section: Variety Of Other Applicationsmentioning
confidence: 99%