Thermal Emission Imaging System (THEMIS) infrared observations of atmospheric dust and water ice cloud optical depth

Details Thermal Emission Imaging System (THEMIS) infrared observations of atmospheric dust and water ice cloud optical depth Thermal Emission Imaging System (THEMIS) infrared observations of atmospheric dust and water ice cloud optical depth

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgre..108.5115s&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue E11, pp. 1-1, CiteID 5115, DOI 10.1029/2003JE002115

Physics

14

Planetology: Solar System Objects: Mars, Planetary Sciences: Atmospheres-Structure And Dynamics, Planetary Sciences: Remote Sensing, Meteorology And Atmospheric Dynamics: Remote Sensing, Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801)

Scientific paper

The Mars Odyssey spacecraft entered into Martian orbit in October 2001 and after successful aerobraking, began mapping in February 2002. Thermal infrared images taken by the Thermal Emission Imaging System (THEMIS) on board the Odyssey spacecraft allow for the quantitative retrieval of atmospheric dust and water ice aerosol optical depth. Data collected so far cover late northern winter, spring, and summer (Ls = 330°-160°). During this period, THEMIS observed the decay of a regional dust storm, a number of local dust storms along the edge of the retreating north polar cap, and the growth of the low-latitude aphelion water ice cloud belt. Data from THEMIS complements the concurrent Mars Global Surveyor Thermal Emission Spectrometer (TES) data by sampling a later local time (~1400 LT for TES versus ~1600-1730 LT for THEMIS) and by observing at much higher spatial resolution. Comparison of water ice optical depth in the aphelion cloud belt from THEMIS and TES shows a significantly higher optical depth in the late afternoon (THEMIS) than in the early afternoon (TES).

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