Accession Number:

ADA239058

Title:

Tropical Cyclone Propagation

Descriptive Note:

Corporate Author:

COLORADO STATE UNIV FORT COLLINS DEPT OF ATMOSPHERIC SCIENCE

Personal Author(s):

Report Date:

1991-05-01

Pagination or Media Count:

6.0

Abstract:

This paper discusses tropical cyclone TC propagation which is defined as the difference in TC motion from outer radius deep layer steering flow movement. Previous analyses have shown that the 5-7 deg radius 850-300 mb layer mean flow give a reasonably good representation of the tropical cyclones steering environment. The author has made many new TC motion related raw-insonde composite analyses for northwest Pacific, Atlantic, and the Australia-South Pacific tropical cyclones. Composite data have been stratified by three motion direction categories west, north, and northeast and three speed slow, average, and fast categories. Stratification has also been made for stationary or nearly stationary cyclones in each basin. Special software programs have been developed to calculate the surrounding cyclone deep layer wind components parallel and perpendicular to the fixed and moving cyclone center. A primary purpose of these analyses has been to quantitatively document the relationship between the tropical cyclones center motion and its surrounding deep layer 850-300 mb winds at various radii.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE