
Accession Number : AD0668540
Title : NUMERICAL STUDIES OF PLANETARY CIRCULATIONS IN A MODEL ATMOSPHERE.
Descriptive Note : Scientific rept. (Final), 1 Aug 6531 Jul 67,
Corporate Author : HEBREW UNIV JERUSALEM (ISRAEL) DEPT OF METEOROLOGY
Personal Author(s) : Huss,A.
Report Date : DEC 1967
Pagination or Media Count : 192
Abstract : The evolution of general circulation patterns has been studied on a betaplane, by means of twolevel quasigeostrophic models, including diabatic heat sources and friction. In the first experiment the influx of heat per unit column was made proportional to the temperature difference at the oceanair interface, and to the geostrophic wind speed at this level. The factor of proportionality was independent of the sign of the temperature difference. In the second experiment its value was reduced by a factor of 10 whenever the air temperature exceeded the ocean temperature. In the third experiment a humidity distribution, evaporation, precipitation and release of latent heat were introduced. The best results were obtained in the third experiment, in which a welldefined 'index cycle' with a period of about 13 days occurred. Integrations were performed by means of a model without diabatic heat sources or surface friction, with initial easterly and initial westerly flow. (Author)
Descriptors : (*EARTH(PLANET), ATMOSPHERIC MOTION), EARTH MODELS, MATHEMATICAL MODELS, PERIODIC VARIATIONS, CORRELATION TECHNIQUES, VELOCITY, CONVECTION(HEAT TRANSFER), DISTRIBUTION, HUMIDITY, EQUATIONS OF MOTION, PATTERN RECOGNITION, THERMODYNAMICS, ENERGY, BOUNDARY VALUE PROBLEMS, MATHEMATICAL PREDICTION, EVAPORATION, HEAT FLUX, SURFACE TEMPERATURE, DIFFERENCE EQUATIONS
Subject Categories : Meteorology
Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE