Author(s): Michael D. Smith
Co-Author(s): Mark Allen, Donald Banfield, Jeffrey Barnes, R. Todd Clancy, Philip James, James Kasting, Paul Wennberg, Daniel Winterhalter, Michael Wolff, Richard Zurek
Panel Selection: Mars: Not Phobos and Deimos.
Institution: NASA Goddard Space Flight Center
Trace gases are a sensitive indicator of current martian activity, whether photochemical or biogeochemical. A Trace Gas Mission measuring atmospheric composition, circulation and state, and locating active sources would characterize this activity and its implications for climate and astrobiology.

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