Accession Number : AD0686184

Title :   CHARACTERISTIC PARAMETERS AND DYNAMICAL EQUATIONS OF ATMOSPHERIC MOTIONS,

Corporate Author : EMMANUEL COLL BOSTON MASS ORIENTAL SCIENCE RESEARCH LIBRARY

Personal Author(s) : Zeng Qing-Zun,

Report Date : NOV 1968

Pagination or Media Count : 27

Abstract : Dynamical equations of atmospheric motions are studied by similarity principle and dimensional analysis. The relationships between the various models of the atmosphere and the limits of their applicability are shown. By analyzing the adiabatic motion of the inviscid flow assuming quasi-static equilibrium and the pressure gradient force and the coriolis force to have the same order of magnitude, three characteristic scales defined by external factors can be determined: the characteristic time scale dependent on the coriolis parameter, the characteristic velocity scale dependent on the stratification and the average temperature of the atmosphere and the characteristic scale of horizontal distance. A generalized system of finite-difference equations suitable for analysis and comparison is presented. The various models correspond to the different values of the coefficients in the equations. The asymptotic nature of the convergence in the method of expansion of small parameters is discussed. Equations for mesoscale systems (L<L0) are especially studied. (Author)

Descriptors :   (*ATMOSPHERIC MOTION, ATMOSPHERE MODELS), ADIABATIC GAS FLOW, BAROMETRIC PRESSURE, CORIOLIS EFFECT, AIR MASS ANALYSIS, WEATHER FORECASTING, NUMERICAL ANALYSIS, DIFFERENCE EQUATIONS, CHINA

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE