Accession Number : AD0726617

Title :   A Numerical Study of the Development of Frontal Motions,

Corporate Author : COLORADO STATE UNIV FORT COLLINS DEPT OF ATMOSPHERIC SCIENCE

Personal Author(s) : Rao,Desiraju B. ; Fritsch,J. Michael

Report Date : JAN 1971

Pagination or Media Count : 40

Abstract : Development of frontal disturbances is considered from a non-linear initial value point of view. The frontal model is a two layer model with a wedge of cold air to the north represented by a homogeneous fluid layer of density rho sub 1, and an overlying warm air layer represented by another homogeneous fluid of density rho sub 2(< rho sub 1). The warm and cold air layers have finite depths and the region of integration is bounded in the north-south direction by rigid boundaries. Inside this region, the depth of cold air goes to zero at some point, depicting the intersection of the frontal surface with the ground. The point of intersection essentially represents a free boundary. The west-east boundaries are periodic. A sinusoidal disturbance is imposed on the frontal surface and the growth of this disturbance is calculated numerically for two-different initial conditions. For each set of initial conditions, various wave lengths and initial shears are considered. The frontal surface at each time step is determined by a simple linear extrapolation of the cold air height fields from the north. (Author)

Descriptors :   (*AIR MASS ANALYSIS, NONLINEAR DIFFERENTIAL EQUATIONS), WIND, PARTIAL DIFFERENTIAL EQUATIONS, NUMERICAL ANALYSIS, NUMERICAL INTEGRATION, MATHEMATICAL MODELS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE