The influence of radiatively active water ice clouds on the Martian climateReportar como inadecuado

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1 LMD - Laboratoire de Météorologie Dynamique 2 Department of Geological Sciences, Brown University, 324 Brook St., Providence, RI 02912, United States

Abstract : Radiatively active water ice clouds RAC play a key role in shaping the thermal structure of the Martian atmosphere. In this paper, RAC are implemented in the LMD Mars Global Climate Model GCM and the simulated temperatures are compared to Thermal Emission Spectrometer observations over a full year. RAC change the temperature gradients and global dynamics of the atmosphere and this change in dynamics in turn implies large-scale adiabatic temperature changes. Therefore, clouds have both a direct and indirect effect on atmospheric temperatures. RAC successfully reduce major GCM temperature biases, especially in the regions of formation of the aphelion cloud belt where a cold bias of more than 10 K is corrected. Departures from the observations are however seen in the polar regions, and highlight the need for better modeling of cloud formation and evolution. © 2012. American Geophysical Union. All Rights Reserved.

Autor: Jean-Baptiste Madeleine - François Forget - E. Millour - T. Navarro - Aymeric Spiga -



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