Kinematic Features of the Large-Scale Mean State Phase II of Gate and Comparison with Phase III Features.
Abstract
Large-scale wind field features are presented for Phase II of the Gobal Atmospheric Research Program's (GARP) Atlantic Tropical Experiment (GATE) and compared with those of Phase III. GATE took place over western Africa and the tropical eastern Atlantic in 1974. Phase II was from 28 July to 17 August and Phase III was from 30 August to 19 September. Presented here are streamline and isotach analyses, derived horizontal winds, kinematic vertical motion, horizontal divergence, and vorticity including the vorticity budget terms. During Phase II, low-level circulation was dominated by convergence and cyclonic vorticity over land; however, over water, divergence dominated. This result and the related patterns of vertical motion seem to be a major difference between circulation features of Phase II and Phase III. Many investigators note that with regard to cloudiness, convection, rainfall, and wave organization and structure, Phase III was more active than Phase II. Comparisons of the analyzed and derived wind data and kinematic variables from this study and that of Vincent and Scott (1980) are made in an attempt to relate these differences in activity to the above findings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1980
- Accession Number
- ADA092444
Entities
People
- Robert Gordon Hughes
Organizations
- Air Force Institute of Technology