Retrieval of Atmospheric Temperature, Dust, and Water Ice Profiles from one Mars Year of MCS Measurements

Details Retrieval of Atmospheric Temperature, Dust, and Water Ice Profiles from one Mars Year of MCS Measurements Retrieval of Atmospheric Temperature, Dust, and Water Ice Profiles from one Mars Year of MCS Measurements

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p32b..07k&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P32B-07

Computer Science

Sound

0300 Atmospheric Composition And Structure, 0394 Instruments And Techniques, 6225 Mars

Scientific paper

Mars Climate Sounder (MCS) is a mid- and far-infrared thermal emission radiometer on board the Mars Reconnaissance Orbiter. It measures radiances in limb and nadir/on-planet geometry from which vertical profiles of atmospheric temperature, water vapor, dust and condensates can be retrieved in an altitude range from 0 to 80 km and with a vertical resolution of ~5 km. MCS has been taking measurements of the Martian surface and atmosphere since Sep. 2006 so the currently available dataset comprises about one Mars year. Here we present results of combined pressure, temperature, dust and water ice profile retrievals from limb measurements during this period. The retrieval is based on a modified Chahine method. Examples of latitudinal cross-sections of these quantities will be shown and seasonal differences will be discussed. Initial results show that dust and temperature in the lower atmosphere are elevated in the northern winter season compared to the southern winter season. Regions of strong middle atmospheric warmings are apparent at both the northern and southern winter pole. Areas of low water ice opacity seem to be associated with these regions, in particular in the northern polar winter.

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