Fog in Valles Marineris

Dense, low lying fog in Valles Marineris.

Image of the western part of Valles Marineris, taken by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express spacecraft on May 25, 2004, showing dense ground fog.
This image has not yet been officially released by ESA.

Image Credit: ESA/DLR/FU Berlin (G. Neukum)/astroarts.org

References:
A. Inada et al.:
Wavelength Dependency and Angular Effects of Reflectance of Fog in Valles Marineris (PDF; 1.7 MB)

A. Inada et al.: Dust Haze in Valles Marineris observed by HRSC and OMEGA onboard Mars Express (PDF; 1.9 MB)

D. Möhlmann: Adsorption water driven processes on Mars (PDF; 1.7 MB)