Background levels of methane in Mars' atmosphere show strong seasonal variations

Affiliations

• ¹ NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA. chris.r.webster@jpl.nasa.gov.
• ² NASA Goddard Space Flight Center, Greenbelt, MD, USA.
• ³ Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, USA.
• ⁴ Department of Earth and Space Science and Engineering, York University, Toronto, ON, Canada.
• ⁵ NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
• ⁶ NASA Ames Research Center, Moffett Field, CA, USA.
• ⁷ Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, Luleå, Sweden.
• ⁸ Instituto Andaluz de Ciencias de la Tierra, Granada, Spain.
• ⁹ Centro de Astrobiología, Instituto National de Tecnica Aerospacial, Madrid, Spain.
• ¹⁰ Geophysical Laboratory, Carnegie Institution for Science, Washington, DC, USA.
• ¹¹ Jacobs Technology, NASA Johnson Space Center, Houston, TX, USA.
• ¹² Laboratoire Interuniversitaire des Systèmes Atmosphériques, Creteil Cedex, France.
• ¹³ Laboratoire Atmosphères, Milieux, Observations Spatiales, Paris Cedex 05, France.
• ¹⁴ Institut de Recherche en Astrophysique et Planétologie, Toulouse, France.
• ¹⁵ Department of Chemistry and Biochemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA.
• ¹⁶ Department of Geosciences, Pennsylvania State University, University Park, PA, USA.
• ¹⁷ School of Environment, Earth and Ecosystem Sciences, Open University, Milton Keynes, UK.
• ¹⁸ Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Mexico City, Mexico.
• ¹⁹ Space Science Institute, Boulder, CO, USA.
• ²⁰ Department of Space Studies, Southwest Research Institute Boulder, Boulder, CO, USA.
• ²¹ Finnish Meteorological Institute, Helsinki, Finland.
• ²² Department of Atmospheric Sciences, Texas A&M University, College Station, TX, USA.