elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

A Stochastic Parameterization for Deep Convection Based on Equilibrium Statistics

Plant, R.S. and Craig, G.C. (2008) A Stochastic Parameterization for Deep Convection Based on Equilibrium Statistics. Journal of the Atmospheric Sciences, 65, pp. 87-105. DOI: 10.1175/2007JAS2263.1.

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB

Official URL: http://ams.allenpress.com/perlserv/?request=get-archive&issn=1520-0469

Abstract

A stochastic parameterization scheme for deep convection is described, suitable for use in both climate and NWP models. Theoretical arguments and the results of cloud-resolving models are discussed in order to motivate the form of the scheme. In the deterministic limit, it tends to a spectrum of entraining/detraining plumes and is similar to other current parameterizations. The stochastic variability describes the local fluctuations about a large-scale equilibrium state. Plumes are drawn at random from a probability distribution function (PDF) that defines the chance of finding a plume of given cloud-base mass flux within each model grid box. The normalization of the PDF is given by the ensemble-mean mass flux, and this is computed with a CAPE closure method. The characteristics of each plume produced are determined using an adaptation of the plume model from the Kain–Fritsch parameterization. Initial tests in the single-column version of the Unified Model verify that the scheme is effective in producing the desired distributions of convective variability without adversely affecting the mean state.

Document Type:Article
Title:A Stochastic Parameterization for Deep Convection Based on Equilibrium Statistics
Authors:
AuthorsInstitution or Email of Authors
Plant, R.S.Univ. of Reading, UK
Craig, G.C.UNSPECIFIED
Date:2008
Journal or Publication Title:Journal of the Atmospheric Sciences
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:65
DOI:10.1175/2007JAS2263.1
Page Range:pp. 87-105
Status:Published
Keywords:convection, stochastic parameterization
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Jana Freund
Deposited On:05 Mar 2008
Last Modified:20 Oct 2014 14:32

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.