publication . Article . 2010

ASSUMED PROBABILITY DENSITY FUNCTIONS FOR SHALLOW AND DEEP CONVECTION

Steven K Krueger; Peter A Bogenschutz; Marat Khairoutdinov;
Open Access
  • Published: 01 Oct 2010 Journal: Journal of Advances in Modeling Earth Systems, volume 2, pages n/a-n/a (issn: 1942-2466, Copyright policy)
  • Publisher: American Geophysical Union (AGU)
Abstract
[1] The assumed joint probability density function (PDF) between vertical velocity and conserved temperature and total water scalars has been suggested to be a relatively computationally inexpensive and unified subgrid-scale (SGS) parameterization for boundary layer clouds and turbulent moments. This paper analyzes the performance of five families of PDFs using large-eddy simulations of deep convection, shallow convection, and a transition from stratocumulus to trade wind cumulus. Three of the PDF families are based on the double Gaussian form and the remaining two are the single Gaussian and a Double Delta Function (analogous to a mass flux model). The assumed ...
Subjects
arXiv: Physics::Fluid Dynamics
free text keywords: Global and Planetary Change, General Earth and Planetary Sciences, Environmental Chemistry, Mass flux, Dirac delta function, symbols.namesake, symbols, Physics, Gaussian, Turbulence, Atmospheric sciences, Probability density function, Statistical physics, Boundary layer, Parametrization, Cloud fraction, Classical mechanics, Physical geography, GB3-5030, Oceanography, GC1-1581
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