Re: M1001115 season etc.
Since this image was in late spring it is possible that the temperature was above 0 degrees C at this latitude, 72 S.
Temperatures in the southern hemisphere can exceed 0 degrees C past 70 S latitude:
South Polar Cap Recession
http://wwwflag.wr.usgs.gov/USGSFlag/Space/MGS_TES/spole99.html
You might be able to compare the solar longitude of 260 and latitude 0f 72 S in this TES temperature map to get an idea of the temperature at the location of M1001115 when the picture was taken.
Bob Clark