Atmospheric tidal forcing of the zonal-mean circulation - The Martian dusty atmosphere

Details Atmospheric tidal forcing of the zonal-mean circulation - The Martian dusty atmosphere Atmospheric tidal forcing of the zonal-mean circulation - The Martian dusty atmosphere

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jats...43..652z&link_type=abstract

Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 43, April 1, 1986, p. 652-670. NASA-sponsored research.

Computer Science

16

Atmospheric Circulation, Dust Storms, Mars Atmosphere, Atmospheric Models, Atmospheric Tides, Heat Flux, Meridional Flow, Momentum Transfer, Vertical Distribution, Mars, Atmosphere, Tidal Effects, Circulation, Dust, Wind, Flux, Heat, Calculations, Simulations, Temperature, Momentum, Dust Storms, Patterns, Tropical Regions, Zoning, Heating, Thermal Effects

Scientific paper

Classical atmospheric tidal theory has been used to compute the bilinear tidal zonal-mean forcing per unit mass of the zonal-mean meridional and zonal winds, together with the tidal zonal-mean heating per unit mass for the dusty Martian atmosphere. The convergences of the tidal Eliassen-Palm (EP) flux have been computed for both clear and dusty atmospheric conditions, including the special case of a 'dusty corridor' in the summer southern subtropics that is meant to simulate the early stages of a planetary-scale Martian dust storm. The calculation of the tidal EP zonal forcing differs from Hamilton in that more realistic thermotidal forcings and basic state temperatures are used. The zonal-mean convergences of the tidal fluxes of heat and momentum are large during a Martian great dust storm and should alter significantly the zonal-mean circulation and its residual component driven by the zonal-mean heating. In particular, the tidal forcing of the meridional wind, which is an order of magnitude greater than its zonal counterpart, is likely to give rise to a complex pattern of significantly ageostrophic zonal-mean flow in the Martian tropics.

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