Changing atmospheric opacity in Gale crater, sols 59 through 101
amateur image processing,
Curiosity (Mars Science Laboratory),
weather and climate
Six Navcam images pointed toward the horizon taken over the course of Curiosity's time near Rocknest document changes in the transparency of the atmosphere.
NASA / JPL / Egorov Vitaly ("Zelenyikot")
The images were taken at different times of day, so some of the image-to-image changes are due to illumination effects. But there is a marked change in Curiosity's ability to see the distant rim of Gale crater at sol 100, about the time that the rover left Rocknest.
Original image data dated on or about November 17, 2012