Accession Number:

ADA091408

Title:

Latent Heat Induced Divergence and the Ultra-Long Waves of the Subtropics and Midlatitudes.

Descriptive Note:

Doctoral thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1979-12-01

Pagination or Media Count:

281.0

Abstract:

Winter and summer Goddard Institute of Space Studies GISS Data System Test DST prototype Global Atmospheric Research Project GARP data time average fields are compared with several average data sets. An analysis of the GISS DST data involving kinematically and noneliptically computed divergent flow fields suggests that the positioning of the subtropical jets and ultra-long waves wavenumbers 1-3 may be partially in response to strong longitudinal variations in tropical convective heating. Experiments with divergent barotropic and two-level primitive equation models are used to test the short 1-3 days and long 15-30 days range effects of large scale tropical heating patterns upon the subtropical and midlatitude long and ultra-long waves and flow patterns. The barotropic model experiments suggest that forcing in the tropics of one hemisphere can significantly accelerate by means of gravity wave energy propagation the opposite hemisphere subtropical jet in a matter of one of three days time, regardless of easterly or westerly tropical flow. The maximum subtropical jets due to forcing in one hemisphere are shown to exist in the opposite hemisphere. Two-level primitive equation model experiments are conducted for the spherical earth with uniform mid and high latitude net diabatic forcing.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE