Posted by tourdemars to Mars Global Surveyor at January 20, 2004 12:00 PM

Two full Martian years of global Mars temperature readings, equal in time to about four Earth years, from the Mars Global Surveyor's (MGS) onboard Thermal Emission Spectrometer are revealing a planet where global dust storms, water ice, and the distance to the sun trigger long-lasting changes in the Martian climate.