Accession Number:

ADA001252

Title:

An Objective Technique for Estimating Large-Scale Flow Pattern in the Tropical Upper Troposphere from Digitized Cloud Brightness Data,

Descriptive Note:

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s):

Report Date:

1974-09-01

Pagination or Media Count:

59.0

Abstract:

An objective technique is proposed to use digitized satellite cloud brightness data to estimate large-scale flow patterns over data-void tropical regions. It is basically a diagnostic model which assumes 1 area-averaged cloud brightness is positively correlated with large-scale divergence in the tropical upper troposphere and 2 large-scale tropical flow is quasi-barotropic and quasi-non-divergent. It can be used at any upper level where divergence is important in determining vorticity. The model requires 1 boundary conditions determined from surrounding wind reports, 2 a mean zonal flow determined from climatology, and 3 an equivalent divergence forcing function constructed empirically from the brightness data. The technique is tested daily over a western North Pacific region for July-August 1971.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE