Detection of Methane in the Atmosphere of Mars-Reference-Cited by-同舟云学术

Detection of Methane in the Atmosphere of Mars

Published:2004-12-03 Issue:5702 Volume:306 Page:1758-1761
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Formisano Vittorio¹²³⁴,Atreya Sushil¹²³⁴,Encrenaz Thérèse¹²³⁴,Ignatiev Nikolai¹²³⁴,Giuranna Marco¹²³⁴

Affiliation:

1. Istituto di Fisica dello Spazio Interplanetario INAF-IFSI, Via del Fosso del Cavaliere 100, 00133 Rome, Italy.

2. Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI 48109–2143, USA.

3. Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique (LESIA), Observatoire de Paris, 5 Place Janssen, 92195 Meudon, France.

4. Space Research Institute of Russian Academy of Sciences (IKI) Profsojuznaja 84/32, 117810 Moscow, Russia.

Abstract

We report a detection of methane in the martian atmosphere by the Planetary Fourier Spectrometer onboard the Mars Express spacecraft. The global average methane mixing ratio is found to be 10 ± 5 parts per billion by volume (ppbv). However, the mixing ratio varies between 0 and 30 ppbv over the planet. The source of methane could be either biogenic or nonbiogenic, including past or present subsurface microorganisms, hydrothermal activity, or cometary impacts.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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