2020
DOI: 10.1029/2019ms001814
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Statistically Steady State Large‐Eddy Simulations Forced by an Idealized GCM: 1. Forcing Framework and Simulation Characteristics

Abstract: Using large‐eddy simulations (LES) systematically has the potential to inform parameterizations of subgrid‐scale processes in general circulation models (GCMs), such as turbulence, convection, and clouds. Here we show how LES can be run to simulate grid columns of GCMs to generate LES across a cross section of dynamical regimes. The LES setup approximately replicates the thermodynamic and water budgets in GCM grid columns. Resolved horizontal and vertical transports of heat and water and large‐scale pressure g… Show more

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Cited by 10 publications
(25 citation statements)
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“…Cloud fraction is a widely used metric in meteorology and environmental sciences to demarcate different cloud types. As inspiration to model scenes for which we calculated cloud fraction profiles we used reconstructions from Lidar and infrared satellite observations [Cesana et al 2019], as well as generated data by established simulations in meteorology [Shen et al 2020]. Cloud fraction is defined as the percentage of grid cells rendered as a cloud (q c > 0) in the whole grid space.…”
Section: Evaluation Discussion and Limitationsmentioning
confidence: 99%
“…Cloud fraction is a widely used metric in meteorology and environmental sciences to demarcate different cloud types. As inspiration to model scenes for which we calculated cloud fraction profiles we used reconstructions from Lidar and infrared satellite observations [Cesana et al 2019], as well as generated data by established simulations in meteorology [Shen et al 2020]. Cloud fraction is defined as the percentage of grid cells rendered as a cloud (q c > 0) in the whole grid space.…”
Section: Evaluation Discussion and Limitationsmentioning
confidence: 99%
“…The model uses an anelastic framework, and it ensures closed total water specific humidity q t and specific entropy s budgets. PyCLES has been used successfully to simulate subtropical marine BL clouds (Tan et al, 2016(Tan et al, , 2017Pressel et al, 2017;Schneider et al, 2019) and deep convective clouds (Shen et al, 2020).…”
Section: Lesmentioning
confidence: 99%
“…In order to include large-scale dynamics in the limited-domain of LES, we use timevarying large-scale fluxes simulated by the GCM. The details of the forcing framework are described in Shen et al (2020). In summary, we use LES to simulate a single grid column of a GCM, but with processes that are parameterized in the GCM (e.g., convection, condensation, and boundary layer turbulence) resolved in the LES.…”
Section: Large-scale Forcingmentioning
confidence: 99%
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