Mars: South Polar Spring Recession as observed by CRISM

Details Mars: South Polar Spring Recession as observed by CRISM Mars: South Polar Spring Recession as observed by CRISM

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufm.p33a1016b&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #P33A-1016

Physics

0738 Ice (1863), 0758 Remote Sensing, 0774 Dynamics

Scientific paper

We are creating a seasonal mosaic of CRISM multispectral data for each MSP (multispectral) image obtained in the south polar region (all regions poleward of 55 deg S) since the start of the MRO primary mission. This effort compliments high resolution targeted observations of the South Polar Cryptic Region (Titus et al., 2007) and OMEGA observations of the south polar cap during spring recession (Langevin et al., 2007). Langevin et al. presented similar maps at 1-10km/pixel - CRISM multispectral observations used here have a nominal resolution of 200m (Seelos, 2007). A similar CRISM multispectral mosaic has been constructed for the north polar region by Seelos et al. (Seelos et al., 2007). Science objectives of this investigation include: 1. High resolution (200m/pixel) multispectral observations of CO2 and H2O seasonal distribution, 2. Observing the point where Cap Recession Observations indicate CO2 has Ultimately Sublimated (CROCUS) line (Kieffer et al., 2000) as a function of solar longitude (ls), 3. Observations of changes in CO2 grain size linked to seasonal brightening of the polar high latitude areas (Langevin et al., 2007), and 200m/pixel observations of dust cover linked to cold jets in the Cyptic Region (Kieffer et al., 2000; Langevin et al., 2007), 4. Observations of small water ice patches in late southern spring (Langevin et al., 2007), 5. Development of climate-based atmospheric correction for use with multispectral data based on TES climatology and DISORT. We will report on the progress of our investigation and present high resolution multispectral mosaics of the south polar cap during spring recession and compare them to data from previous years. References Kieffer, H., et al., 2000. Mars south polar spring and summer behavior observed by TES: Seasonal cap evolution controlled by frost grain size. JGR 105, 9653-9700. Langevin, Y., et al., 2007. Observations of the south seasonal cap of Mars during recession in 2004-2006 by the OMEGA visible/near-infrared imaging spectrometer on board Mars Express. JGR 112, 10.1029/2006JE002841. Seelos, F. P., et al., 2007. CRISM Multispectral Survey Campaign - Status and Initial Mosaics. LPSC XXXVIII, Abstract 2336. Titus, T. N., et al., 2007. MRO CRISM observations of the South Polar Cryptic Region. 7th International Conference on Mars, Abstract 3275.

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