Accession Number : AD0685239

Title :   A NUMERICAL STUDY OF TROPICAL ATMOSPHERIC CIRCULATIONS,

Corporate Author : MIAMI UNIV CORAL GABLES FLA INST OF ATMOSPHERIC SCIENCE

Personal Author(s) : Pike,Arthur C.

Report Date : 31 OCT 1968

Pagination or Media Count : 130

Abstract : A time-dependent primitive-equation numerical model in two dimensions, horizontal distance and height, is developed and applied to the study of the general circulation of the tropical troposphere, with particular reference to the inter-tropical convergence zone (ITC), and of the tradewind flow over an eastern subtropical ocean below ca. three kilometers. This model incorporates the effects of buoyant convection, small-scale vertical eddy diffusion and large-scale horizontal diffusion; it is particularly responsive to imposed sea-surface temperatures. The results show that ITC structure is determined mainly by the surface temperature profile, the major updraughts being located, on the average, at the latitudes of highest temperature. Frictional convergence effects may cause the ITC to form temporarily at other latitudes. The sparse trade-wind precipitation of 0.10-0.15cm/day is well-predicted by this model. (Author)

Descriptors :   (*ATMOSPHERIC MOTION, MATHEMATICAL MODELS), (*TROPOSPHERE, ATMOSPHERIC MOTION), SEA BREEZE, WIND, DIFFUSION, CONVECTION(ATMOSPHERIC), SURFACE TEMPERATURE, FRICTION, ATMOSPHERIC PRECIPITATION, PREDICTIONS, MATHEMATICAL ANALYSIS, TROPICAL REGIONS

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE