Martian Wave of Darkening: A Frost Phenomenon?
- 1 July 1966
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 153 (3731) , 56-60
- https://doi.org/10.1126/science.153.3731.56
Abstract
A new hypothesis attributes the Martian "wave of darkening" to soil frost phenomena. Diurnal thawing and freezing of the ground, which uses moisture transported by the atmosphere from the melting polar cap, can produce various minute, frost-heaved, soil surface features. These microrelief features result in a complex porous surface structure, which causes optical darkening. The boundary at which the wave of darkening terminates on the winter hemisphere correlates with the latitude at which the diurnal peak surface temperature drops below 0°C. The hypothesis is examined in terms of known properties of the Martian atmosphere and surface and the availability of water.Keywords
This publication has 4 references indexed in Scilit:
- An Analysis of the Spectrum of Mars.The Astrophysical Journal, 1964
- Photometric studies of complex surfaces, with applications to the MoonJournal of Geophysical Research, 1963
- The water vapor content of the martian atmosphere as a problem of chemical equilibriumPlanetary and Space Science, 1963
- The light-diffusing properties of magnesium oxideProceedings of the Physical Society, 1946