Accession Number : ADA313859

Title :   Tropical Cyclone Motion in the Western Pacific.

Descriptive Note : Final rept. 1 Mar 90-30 Jun 96,

Corporate Author : HAWAII UNIV HONOLULU DEPT OF METEOROLOGY

Personal Author(s) : Schroeder, Thomas A. ; Wang, Bin

PDF Url : ADA313859

Report Date : 15 JUL 1996

Pagination or Media Count : 11

Abstract : A systematic examination of the physics of beta-drift of tropical cyclones has been undertaken. Sequentially we analysed beta-drift of a vortex with baroclinic structure, explored the physics of development and gyration of beta gyres and then exposed the vortex to environmental shears. Through this work we have: identified physical factors controlling drift of a baroclinic vortex in a quiescent environment, identified variability of drift due to vortex structure, developed a kinetic energy theory to explain gyre formation, identified the effect of horizontal shears on beta-drift, proven that shear strain rate of environmental flow alters drift speed and shown the mechanisms by which environmental shear changes beta-drift direction. A theory has been developed for dependence of beta-drift on environmental shear and initial vortex structure.

Descriptors :   *VORTICES, *TROPICAL CYCLONES, PRESSURE GRADIENTS, AIR FLOW, STRAIN RATE, FLOW FIELDS, SHEAR STRESSES, KINETIC ENERGY, WIND DIRECTION, WIND VELOCITY, BAROMETRIC PRESSURE, PACIFIC OCEAN, AIR WATER INTERACTIONS, MARINE METEOROLOGY, SHEAR FLOW, SHEAR STRENGTH, MONSOONS, ANTICYCLONES.

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE