They’ve made a wind map of Gale Crater based on the data received, and there are possibly dustless dust-devils, or convective vortices that occur around noon of a Mars day passing over the Rover. The Rover has stopped at a place called Rocknest, and from this article:
‘Scientists theorize that in Mars’ distant past its environment may have been quite different, with persistent water and a thicker atmosphere. NASA’s Mars Atmosphere and Volatile Evolution, or MAVEN, mission will investigate possible losses from the upper atmosphere when it arrives at Mars in 2014.
With these initial sniffs of Martian atmosphere, SAM also made the most sensitive measurements ever to search for methane gas on Mars. Preliminary results reveal little to no methane. Methane is of interest as a simple precursor chemical for life. On Earth, it can be produced by either biological or non-biological processes.
Methane has been difficult to detect from Earth or the current generation of Mars orbiters because the gas exists on Mars only in traces, if at all.’
Addition: Have they already found some data suggesting proof of sub-surface microbial life at Rocknest? Stay tuned.