Abstract: A nearly analytic model of a gravity wave driven middle atmosphere circulation is formulated. The simplified model represents the one-dimensional interaction of a single gravity wave mode with a zonal-mean flow. Solutions ...

Abstract: Viking Lander 2 meteorological data from the fall and winter seasons of a second Mars annual cycle have been subjected to time spectral and cross-spectral analysis, so as to determine important characteristics of the ...

Abstract: The nature of the synoptic period variations in the Viking 2 pressure, wind and temperature data is investigated, using time-spectral and cross-spectral analysis, for selected portions of the Mars fall, winter and spring ...

Abstract: The linear baroclinic instability of zonal-mean flows like those in the wintertime Martian atmosphere under both relatively nondusty and highly dusty conditions is examined using a spherical quasi-geostrophic model. The ...

Abstract: The effects of thermal damping on the finite-amplitude behavior of a baroclinic wave are investigated using a quasi-geostrophic, ?-plane model The model possesses high vertical resolution so that there are many vertical ...

Abstract: Mariner 9 and Viking spacecraft observations provided evidence for planetary-scale, wavelike disturbances in the Mars winter atmosphere. Possible sources of the wave activity are dynamical instabilities, for example, ...

Abstract: A multilevel, global, primitive equation model is used to examine the nonlinear development of baroclinic waves (confined initially to a single zonal wavenumber) on a symmetric zonal flow. The focus is on the influence of ...

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 ...