Timing of frost deposition on Martian dunes: A clue to properties of dune particles?

Details Timing of frost deposition on Martian dunes: A clue to properties of dune particles? Timing of frost deposition on Martian dunes: A clue to properties of dune particles?

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..266t&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 266-267 (SEE N87-23341 16-91)

Physics

Geophysics

Albedo, Annual Variations, Dunes, Dust, Frost, Mars Surface, Reflectance, Sands, Seasons, Atmospheric Temperature, Temperature Dependence, Viking Orbiter 2

Scientific paper

Scans were made across the Martian dunes found in images taken at several different times to determine the time history of the dune albedo. Atmospheric contributions were estimated using optical depth data and the brightness of shadows in some images. The data show that the dunes brighten very substantially between L(s) = 10 and 40 deg, depending on the latitude. Bright coverings on dunes form outliers 1 to 5 deg north of the cap edge. Formation of the general cap then sometimes reverses the contrast of the dune field with the surrounding area. Causes for the early deposition of frost on dunes relative to surroundings are discussed.

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