Article
 

The Martian Zonal-Mean Circulation: Angular Momentum and Potential Vorticity Structure in GCM Simulations

Pubblico Deposited

Contenuto scaricabile

Scarica il pdf
https://ir.library.oregonstate.edu/concern/articles/w0892g79c

Descriptions

Attribute NameValues
Creator
Abstract
  • Analysis of simulations performed with the NASA/Ames Mars GCM shows that under dusty conditions the Northern Hemisphere winter solstice circulation becomes characterized by a zonally averaged state in which the potential vorticity at upper levels is very small outside of high latitudes. The available observational data-in particular the 15-µm observations obtained by the Viking IRTM during the 1977 winter solstice global dust storm-provide evidence for changes in the Martian circulation that are basically like those found in the GCM. In the Mars GCM simulations for dusty solstice conditions, an extremely intense and approximately angular-momentum-conserving Hadley circulation is responsible for creating the low potential vorticity configuration. This can be contrasted with the Venus-Titan numerical simulations discussed by Allison et al. in which quasi-barotropic eddies appear to be largely responsible for the existence of low potential vorticity in lower and midlatitudes. At a near-equinox season the simulated Mars circulation is greatly weakened in comparison to that for solstice conditions, angular momentum is not approximately conserved by the mean meridional circulation, and potential vorticity increases relatively smoothly away from the equator.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Barnes, Jeffrey R., Robert M. Haberle, 1996: The Martian Zonal-Mean Circulation: Angular Momentum and Potential Vorticity Structure in GCM Simulations. Journal of the Atmospheric Sciences, 53(21), 3143–3156.
Journal Title
Journal Volume
  • 53
Journal Issue/Number
  • 21
Academic Affiliation
Dichiarazione dei diritti
Funding Statement (additional comments about funding)
  • The lead author's work has been supported by a grant from the Planetary Atmospheres Program of NASA and by a Cooperative Agreement with the NASA/Ames Research Center. The Mars GCM project at Ames has been supported by the Planetary Atmospheres Program of NASA.
Publisher
Peer Reviewed
Language
Replaces

Le relazioni

Parents:

This work has no parents.

Elementi

Thumbnail Titolo Data caricata Visibilità Azioni
file details BarnesJeffreyR.CEOAS.MartianZonalMean.pdf 2017-12-06 Pubblico Scaricare