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Titolo:
A STATISTICAL CLOUD SCHEME FOR USE IN AN AGCM
Autore:
RICARD JL; ROYER JF;
Indirizzi:
METEO FRANCE,CTR NATL RECH METEOROL,42 AVE G CORIOLIS F-31057 TOULOUSE FRANCE
Titolo Testata:
Annales geophysicae
fascicolo: 11-12, volume: 11, anno: 1993,
pagine: 1095 - 1115
SICI:
0992-7689(1993)11:11-12<1095:ASCSFU>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
PLANETARY BOUNDARY-LAYER; TURBULENCE CLOSURE-MODEL; GEOPHYSICAL FLOWS; ENERGY-MODEL; PREDICTION; SIMULATION; PARAMETERIZATION; CONDENSATION; WATER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
J.L. Ricard e J.F. Royer, "A STATISTICAL CLOUD SCHEME FOR USE IN AN AGCM", Annales geophysicae, 11(11-12), 1993, pp. 1095-1115

Abstract

We have designed a diagnostic subgrid scale cloud scheme that brings some coherence to the various representations of clouds within the GCM. It takes into account interactions between cloud fraction coverage, liquid water content and turbulence (for stratiform clouds). The scheme has been developed on the basis of a statistical cloud scheme and a level 2 subgrid scale turbulence scheme (Yamada and Mellor) in which we introduce the effects of water vapor and liquid water. The scheme has been implemented in the T42-20 level version of the French spectral GCM used for climate studies. Simultaneously, large-scale precipitation has been modified according to Smith's scheme (with different parameterizations for liquid and ice water). The GCM has been run with and without the new parameterizations. We have studied the impact of the implementation of two new parameterizations on the results of the FrenchEmeraude GCM in January. The model simulations are validated with satellite data from the ERB experiment (total cloudiness field) and from the ERBE experiment (visible and IR radiation fields at the top of theatmosphere),

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Documento generato il 27/11/20 alle ore 09:49:04