BOULDER, Colorado Evidence for intense local enhancements in methane on Mars has been bolstered by ground-based observations. The methane, as well as water on Mars, was detected using state-of-the-art infrared spectrometers stationed atop Mauna Kea, Hawaii and in Cerro Pachón, Chile.
http://www.space.com/scienceastronomy/050419_mars_methane.html
http://www.space.com/scienceastronomy/050419_mars_methane.html