Publication Date

1980

Document Type

Dissertation/Thesis

First Advisor

Petersen, Ralph S.

Degree Name

M.S. (Master of Science)

Department

Department of Geography

LCSH

Atmospheric circulation--Mathematical models

Abstract

An efficient technique for the computation of dry isentropic trajectories is presented. The method is baaed on the discrete model formulation of Greenspan that was used by Petersen and Uccelllni which solves the equation of motion numerically. The introduction of an alternate numerical technique enabled a significant reduction of errors and a stabilization for larger time steps when applied to idealized mass and motion fields. To simulate moist adiabatic motions, latent heat release is included in the model through an efficient iterative process. Results using this technique were unique and indistinguishable from those obtained on a thermodynamic diagram. Moist trajectories showed slightly larger errors than comparative dry trajectories clue to several simplifying assumptions and greater accelerations encountered after vertical motions away from the initial isantropic surface. Both. the moist and dry computation techniques yielded reliable, energy-consistent trajectories.

Comments

Includes bibliographical references.||Includes maps.

Extent

45 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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