Mars Express finds water supersaturation in the Martian atmosphere

Paris, France (ESA) Sep 30, 2011 New analysis of data sent back by the SPICAM spectrometer on board ESA's Mars Express spacecraft has revealed for the first time that the planet's atmosphere is supersaturated with water vapour. This surprising discovery has major implications for understanding the Martian water cycle and the historical evolution of the atmosphere. Although numerous spacecraft have visited Mars over the past half a century, very few direct measurements of the vertical structure of the planet's atmosphere have been ...
http://www.marsdaily.com/reports/Mars_Express_finds_water_supersaturation_in_the_Martian_atmosphere_999.html