The intraseasonal evolution of angular momentum in aquaplanet and realistic GCMs

Research output: Contribution to journalArticle

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Abstract

This paper describes the evolution of global angular momentum (GAM) on intraseasonal timescales in data from two general circulation model (GCM) runs: an aquaplanet GCM and a fully "realistic' GCM that includes continents, topography, and observed climatological sea surface temperatures. For both GCMs, the angular momentum budget is quite well balanced. Composite analysis shows that the GAM tendency is largest as a precipitation anomaly propagates eastward along the equator. Associated with the precipitation anomaly is a tropical circulation that shows some of the characteristics of the Gill model, particularly in the aquaplanet GCM, and a Rossby wave train that propagates from the Tropics into midlatitudes. -from Authors

Original languageEnglish (US)
Pages (from-to)625-649
Number of pages25
JournalJournal of the Atmospheric Sciences
Volume52
Issue number6
DOIs
StatePublished - Jan 1 1995

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angular momentum
general circulation model
anomaly
Rossby wave
train
sea surface temperature
topography
timescale

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

@article{6264189d532249ae81fad00c9432fd22,
title = "The intraseasonal evolution of angular momentum in aquaplanet and realistic GCMs",
abstract = "This paper describes the evolution of global angular momentum (GAM) on intraseasonal timescales in data from two general circulation model (GCM) runs: an aquaplanet GCM and a fully {"}realistic' GCM that includes continents, topography, and observed climatological sea surface temperatures. For both GCMs, the angular momentum budget is quite well balanced. Composite analysis shows that the GAM tendency is largest as a precipitation anomaly propagates eastward along the equator. Associated with the precipitation anomaly is a tropical circulation that shows some of the characteristics of the Gill model, particularly in the aquaplanet GCM, and a Rossby wave train that propagates from the Tropics into midlatitudes. -from Authors",
author = "Feldstein, {Steven B.} and Sukyoung Lee",
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journal = "Journals of the Atmospheric Sciences",
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}

The intraseasonal evolution of angular momentum in aquaplanet and realistic GCMs. / Feldstein, Steven B.; Lee, Sukyoung.

In: Journal of the Atmospheric Sciences, Vol. 52, No. 6, 01.01.1995, p. 625-649.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The intraseasonal evolution of angular momentum in aquaplanet and realistic GCMs

AU - Feldstein, Steven B.

AU - Lee, Sukyoung

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N2 - This paper describes the evolution of global angular momentum (GAM) on intraseasonal timescales in data from two general circulation model (GCM) runs: an aquaplanet GCM and a fully "realistic' GCM that includes continents, topography, and observed climatological sea surface temperatures. For both GCMs, the angular momentum budget is quite well balanced. Composite analysis shows that the GAM tendency is largest as a precipitation anomaly propagates eastward along the equator. Associated with the precipitation anomaly is a tropical circulation that shows some of the characteristics of the Gill model, particularly in the aquaplanet GCM, and a Rossby wave train that propagates from the Tropics into midlatitudes. -from Authors

AB - This paper describes the evolution of global angular momentum (GAM) on intraseasonal timescales in data from two general circulation model (GCM) runs: an aquaplanet GCM and a fully "realistic' GCM that includes continents, topography, and observed climatological sea surface temperatures. For both GCMs, the angular momentum budget is quite well balanced. Composite analysis shows that the GAM tendency is largest as a precipitation anomaly propagates eastward along the equator. Associated with the precipitation anomaly is a tropical circulation that shows some of the characteristics of the Gill model, particularly in the aquaplanet GCM, and a Rossby wave train that propagates from the Tropics into midlatitudes. -from Authors

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