Accession Number : ADA305848

Title :   Evaluation of an Interactive Regional Wind Analysis Procedure for the Tropics.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Jeffries, Richard A.

PDF Url : ADA305848

Report Date : SEP 1995

Pagination or Media Count : 147

Abstract : An interactive tropical wind analysis technique is developed that combines the best features of the automated and subjective analyses over a limited region. An automated, large-scale analysis is used as a first-guess field. Composite observations over two 6-hour synoptic times and synthetic observations are added as increments to the first-guess field. Complete sets of synthetic observations are introduced to represent the upper- and lower-level structure of tropical cyclones, Tropical Upper Tropospheric Trough cells, upper-level anticyclonic cells, weak low- level cyclones, and point outflows from convective clusters. Point synthetic observations are inserted to represent satellite-observed features such as confluent asymptotes, or offset bad observations. A Multi-Quadric interpolation technique that draws closely to the wind observations effectively and efficiently provides an analysis on a 10 lat./long. grid. A sequence of 200 mb and 850 mb interactive analyses that includes Typhoon Robyn and Tropical Storm Steve is used to demonstrate changes from the first-guess and especially the vertical wind shear when synthetic observations are added.

Descriptors :   *WIND, *NUMERICAL ANALYSIS, *WEATHER FORECASTING, *TROPICAL REGIONS, AUTOMATION, INTERACTIONS, GRIDS, CONVECTION, REGIONS, PROBLEM SOLVING, CLUSTERING, VERTICAL ORIENTATION, STORMS, WIND SHEAR, DATA ACQUISITION, CYCLONES, TROPICAL CYCLONES, TYPHOONS.

Subject Categories : Meteorology
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE