Mars From Afar
Dust Storms
In late June 2001, as the martian southern winter gave way to
spring, dust storms began to kick up as cold air from the south
polar ice cap moved north toward warmer air at the equator. By early
July, dust storms had cropped up all over the planet, whose surface,
by the end of the month, had become almost entirely obscured, as if
by a single, global storm. By late September, the storms had largely
abated, though the atmosphere remained hazy into November.