Een prettig leesbaar stuk over het klimaat op Mars is; http://quest.nasa.gov/aero/planetary/mars.html
een stukje hieruit;
Q
Occasionally, winds on Mars are strong enough to create dust storms that cover much of the planet. After such storms, it can be months before all of the dust settles. The maximum wind speeds recorded by the Viking Landers in the 1970’s were about 30 meters per second (60 miles an hour) with an average of 10 m/s (20 mph). Just as on Earth, at certain latitudes, the winds tend to blow in certain directions.
/Q