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DOI10.1038/s41561-019-0331-9
Independent confirmation of a methane spike on Mars and a source region east of Gale Crater
Giuranna M.; Viscardy S.; Daerden F.; Neary L.; Etiope G.; Oehler D.; Formisano V.; Aronica A.; Wolkenberg P.; Aoki S.; Cardesín-Moinelo A.; Marín-Yaseli de la Parra J.; Merritt D.; Amoroso M.
发表日期2019
ISSN17520894
卷号12期号:5
英文摘要Reports of methane detection in the Martian atmosphere have been intensely debated. The presence of methane could enhance habitability and may even be a signature of life. However, no detection has been confirmed with independent measurements. Here, we report a firm detection of 15.5 ± 2.5 ppb by volume of methane in the Martian atmosphere above Gale Crater on 16 June 2013, by the Planetary Fourier Spectrometer onboard Mars Express, one day after the in situ observation of a methane spike by the Curiosity rover. Methane was not detected in other orbital passages. The detection uses improved observational geometry, as well as more sophisticated data treatment and analysis, and constitutes a contemporaneous, independent detection of methane. We perform ensemble simulations of the Martian atmosphere, using stochastic gas release scenarios to identify a potential source region east of Gale Crater. Our independent geological analysis also points to a source in this region, where faults of Aeolis Mensae may extend into proposed shallow ice of the Medusae Fossae Formation and episodically release gas trapped below or within the ice. Our identification of a probable release location will provide focus for future investigations into the origin of methane on Mars. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种英语
scopus关键词crater; detection method; in situ measurement; Mars; Martian atmosphere; measurement method; methane; observational method; simulation; Hydroida
来源期刊Nature Geoscience
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/124681
作者单位Istituto di Astrofisica e Planetologia Spaziali, Istituto Nazionale di Astrofisica, Rome, Italy; Royal Belgian Institute for Space Aeronomy, Brussels, Belgium; Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy; Faculty of Environmental Science and Engineering, Babes-Bolyai University, Cluj-Napoca, Romania; Planetary Science Institute, Tucson, AZ, United States; Centrum Badań Kosmicznych Polska Akademia Nauk, Warsaw, Poland; Fonds National de la Recherche Scientifique, Brussels, Belgium; Department of Geophysics, Tohoku University, Sendai, Japan; European Space Astronomy Centre, Madrid, Spain; Agenzia Spaziale Italiana, Sede di Matera, Italy
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Giuranna M.,Viscardy S.,Daerden F.,et al. Independent confirmation of a methane spike on Mars and a source region east of Gale Crater[J],2019,12(5).
APA Giuranna M..,Viscardy S..,Daerden F..,Neary L..,Etiope G..,...&Amoroso M..(2019).Independent confirmation of a methane spike on Mars and a source region east of Gale Crater.Nature Geoscience,12(5).
MLA Giuranna M.,et al."Independent confirmation of a methane spike on Mars and a source region east of Gale Crater".Nature Geoscience 12.5(2019).
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