Water ice clouds over the Martian tropics during northern summer

Details Water ice clouds over the Martian tropics during northern summer Water ice clouds over the Martian tropics during northern summer

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3718202h&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 18, CiteID L18202

Physics

6

Planetary Sciences: Solar System Objects: Mars, Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Cloud/Radiation Interaction, Atmospheric Processes: Clouds And Cloud Feedbacks, Atmospheric Processes: General Circulation (1223)

Scientific paper

Atmospheric models suggest that infrared heating due to water ice clouds over the tropics of Mars during early northern summer has a significant impact on the thermal structure of the tropics at cloud level and of the middle atmosphere near the south pole. Retrievals from limb observations by the Mars Climate Sounder on Mars Reconnaissance Orbiter during early northern summer show that water ice clouds over the northern tropics are thinner and higher than in published model results. Later in this season, the latitudinal extent, apparent mass mixing ratio (and infrared heating rate), and altitude of nighttime tropical clouds significantly increase, reaching a maximum just before northern fall equinox. Published model results do not show this transition. By underestimating the altitude at which water ice clouds form, models also may underestimate the intensity of the meridional circulation at higher altitudes in the tropics during northern summer.

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