CRISM limb observations of Mars dayside O2 singlet delta emission during 2010-2011

Details CRISM limb observations of Mars dayside O2 singlet delta emission during 2010-2011 CRISM limb observations of Mars dayside O2 singlet delta emission during 2010-2011

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..283c&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.283

Computer Science

Scientific paper

Since July of 2009, the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) onboard the Mars Reconnaissance Orbiter (MRO) has obtained limb scans over two orbits at solar longitude (Ls) intervals of ~30°. With a spectral resolution of ~12 nm, CRISM visible-to-near IR limb spectra 0.4- 4.0 μm) enable vertical profiling of dust and ice aerosols, water vapor, CO, and O2 singlet delta emission (at 1.27 μm) in the Mars atmosphere [3, 7, 10, 11]. The CRISM limb observations are obtained over a full set of latitudes (~10° intervals) for longitudes centered on 110W (Tharsis) and 300W (Hellas). Initial work on CRISM O2 singlet delta limb observations has centered on polar nightglow emission associated with atomic oxygen recombination at 40-60 km altitudes [2,3]. The current presentation regards O2 singlet delta emission associated with ozone photolysis in the dayside atmosphere at 10-40 km altitudes (e.g., [8,9]). This dayside emission provides a key profile observation of dayside ozone photochemistry, and so may reflect upon heterogeneous reactions on Mars aerosols [1,6] proposed (in part) to increase methane destruction rates in the Mars atmosphere.

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