Modification of a variational objective analysis model for new equations for pressure gradient and vertical velocity in the lower troposphere and for spatial resolution and accuracy of satellite data

Achtemeier, Gary L.

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https://hdl.handle.net/2142/109952 Copy

Description

Title

Modification of a variational objective analysis model for new equations for pressure gradient and vertical velocity in the lower troposphere and for spatial resolution and accuracy of satellite data

Author(s)

Achtemeier, Gary L.

Issue Date

1986-10

Keyword(s)

• Satellite data
• Atmospheric modelling

Abstract

Since late 1982 NASA has supported research to develop a numerical variational model for the diagnostic assimilation of conventional and space-based meteorological data. In order to analyze the model components, four variational models are defined dividing the problem naturally according to increasing complexity. The first of these variational models (MODEL I), the subject of this report, contains the two nonlinear horizontal momentum equations, the integrated continuity equation, and the hydrostatic equation. This report summarizes the results of research (1) to improve the way the large nonmeteorological parts of the pressure gradient force are partitioned between the two terms of the pressure gradient force terms of the horizontal momentum equations, (2) to generalize the integrated continuity equation to account for variable pressure thickness over elevated terrain, and (3) to introduce horizontal variation in the precision modulus weights for the observations.

Series/Report Name or Number

• ISWS Miscellaneous Publication MP-093
• NASA Contractor Report NASA-CR-4025

Type of Resource

text

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http://hdl.handle.net/2142/109952

Has Version(s)

https://ntrs.nasa.gov/citations/19870002652

Sponsor(s)/Grant Number(s)

NASA NAS8-36474

Copyright and License Information

Public domain, federal government document.

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