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):

Report Date:

1995-09-01

Pagination or Media Count:

147.0

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.

Subject Categories:

  • Meteorology
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE