Accession Number : ADA227687

Title :   Examples of Isallobaric Forcing in Surface Frontal Motion and Surface Frontogenesis over the Central United States

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Christy, Steven R.

PDF Url : ADA227687

Report Date : 23 FEB 1990

Pagination or Media Count : 110

Abstract : The extent to which the isallobaric component of the ageostrophic wind influences surface frontal motion and frontogenesis is not well understood. In this observational study the isallobaric contribution to surface frontal propagation is subjectively ascertained by diagnosis of isallobaric influence on the actual wind crossfrontal components and frontogenetical forcing. Hourly average surface frontal motions are calculated over a several hour period for three case studies and compared to surface actual, geostrophic, and frictionless isallobaric wind crossfrontal components. In addition, isallobaric crossfrontal contribution to surface frontal motion appears somewhat random and has a very limited geographical extent. In contrast, the isallobaric influence on actual wind frontogenetical forcing can be substantial. In many areas where frontogenetically induced frontal motion by the actual wind is indicated, the issallobaric contribution appears to be significant. (Author) (jd)

Descriptors :   *WEATHER FORECASTING, *FRONTS(METEOROLOGY), BAROMETRIC PRESSURE, UNITED STATES, CASE STUDIES

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE