Cloud Layers Unified By Binormals
Overview
The Cloud Layers Unified By Binormals (CLUBB) parameterization is a parameterization of subgrid-scale turbulence and clouds.1234 It prognoses turbulent fluxes of heat, moisture, and momentum, and it diagnoses the liquid cloud fraction and liquid water mixing ratio. To do so, it prognoses higher-order turbulence moments and closes those prognostic equations by use of an assumed double-Gaussian shape of the subgrid probability density function. CLUBB operates throughout the troposphere, but it contributes especially to the planetary boundary layer and low-cloud regimes, including stratocumulus and shallow cumulus regimes.
Namelist parameters
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Vincent E. Larson. CLUBB-SILHS: A parameterization of subgrid variability in the atmosphere. March 2022. arXiv:1711.03675 [physics]. URL: http://arxiv.org/abs/1711.03675 (visited on 2024-03-29), doi:10.48550/arXiv.1711.03675. ↩
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Peter A. Bogenschutz, Andrew Gettelman, Cecile Hannay, Vincent E. Larson, Richard B. Neale, Cheryl Craig, and Chih-Chieh Chen. The path to CAM6: coupled simulations with CAM5.4 and CAM5.5. Geoscientific Model Development, 11(1):235–255, January 2018. URL: https://gmd.copernicus.org/articles/11/235/2018/ (visited on 2024-03-29), doi:10.5194/gmd-11-235-2018. ↩
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Vincent E. Larson and Jean-Christophe Golaz. Using Probability Density Functions to Derive Consistent Closure Relationships among Higher-Order Moments. Monthly Weather Review, 133(4):1023–1042, April 2005. URL: https://journals.ametsoc.org/view/journals/mwre/133/4/mwr2902.1.xml (visited on 2024-03-29), doi:10.1175/MWR2902.1. ↩
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Jean-Christophe Golaz, Vincent E. Larson, and William R. Cotton. A PDF-Based Model for Boundary Layer Clouds. Part I: Method and Model Description. Journal of the Atmospheric Sciences, 59(24):3540–3551, December 2002. URL: https://journals.ametsoc.org/view/journals/atsc/59/24/1520-0469_2002_059_3540_apbmfb_2.0.co_2.xml (visited on 2024-03-29), doi:10.1175/1520-0469(2002)059<3540:APBMFB>2.0.CO;2. ↩