Low Background Levels of Mars Methane at Gale Crater Indicate Seasonal Cycle: Updated Results from TLS-SAM on Curiosity

Christopher R Webster, NASA Jet Propulsion Laboratory, Pasadena, CA, United States, Paul R Mahaffy, NASA Goddard Space Flight Center, Greenbelt, United States, Sushil K Atreya, University of Michigan Ann Arbor, Ann Arbor, MI, United States and SAM Science Team