Accession Number : AD0648587

Title :   RESEARCH IN FOUR-DIMENSIONAL DIAGNOSIS OF CYCLONIC STORM CLOUD SYSTEMS,

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK

Personal Author(s) : Danielsen,E. F.

Report Date : NOV 1966

Pagination or Media Count : 63

Abstract : The isentropic trajectory method which provides high resolution fields of vertical motions and the history of the air's three dimensional motion has been adapted for a high speed computer. Grid point values of the Montgomery Stream Function and pressure on the isentropic surface are read from hand analyses. All remaining operations are performed by the computer which include: an iterative solution of the balance equation, computations of the path of each trajectory from the Montgomery Stream Function and the balanced wind vectors, contouring of the stream function, isotachs and trajectories, computation and plotting of the vertical velocities. The method of solving the balance equation and the trajectory method are discussed. Comparisons between machine and hand computed trajectories and vertical motions are included for the November storm which was discussed in Scientific Report No. 1. A complete diagnosis of a March storm and a partial diagnosis of an April storm are also presented and discussed. The vertical velocities are well correlated with the clouds, precipitation regions and rates of cyclogenesis.

Descriptors :   (*CYCLONES, ATMOSPHERIC MOTION), (*STORMS, ATMOSPHERIC PRECIPITATION), WIND, VELOCITY, CLOUDS, MOTION, COMPUTERS, TRAJECTORIES, METEOROLOGICAL PHENOMENA, METEOROLOGICAL CHARTS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE