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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28635
Title: No detection of methane on Mars from early ExoMars Trace Gas Orbiter observations
Authors: Korablev, Oleg
Avandaele, Ann Carine
Montmessin, Franck
Fedorova, Anna A.
Trokhimovskiy, Alexander
Forget, François
Lefèvre, Franck
Daerden, Frank
Thomas, Ian R.
Trompet, Loïc
Erwin, Justin T.
Kasaba, Yasumasa
Kass, David
Khatuntsev, Igor
Kleinböhl, Armin
Kokonkov, Nikita
Krasnopolsky, Vladimir
Kuzmin, Ruslan
Lacombe, Gaétan
LANCIANO, ORIETTA
Lellouch, Emmanuel
Oliva, Fabrizio
Lewis, Stephen
Luginin, Mikhail
Liuzzi, Giuliano
López-Puertas, Manuel
López-Valverde, Miguel
Määttänen, Anni
Mahieux, Arnaud
Marcq, Emmanuel
Martin-Torres, Javier
Maslov, Igor
Patsaev, Dmitry
Medvedev, Alexander
Millour, Ehouarn
Moshkin, Boris
Mumma, Michael J.
Nakagawa, Hiromu
Novak, Robert E.
Piccialli, Arianna
Quantin-Nataf, Cathy
Renotte, Etienne
Ritter, Birgit
Rodin, Alexander
Schmidt, Frédéric
Schneider, Nick
Shematovich, Valery
Aoki, Shohei
Smith, Michael D.
Teanby, Nicholas A.
Thiemann, Ed
Thomas, Nicolas
Vander Auwera, Jean
Vazquez, Luis
Villanueva, Geronimo
Vincendon, Matthieu
Whiteway, James
Wilquet, Valérie
Robert, Séverine
Wolff, Michael J.
WOLKENBERG, PAULINA MARIA 
Yelle, Roger
Young, Roland
Zasova, Ludmila
Zorzano, Maria Paz
Neary, Lori
Viscardy, Sébastien
Grigoriev, Alexey V.
Ignatiev, Nikolay I.
Shakun, Alexey
Patrakeev, Andrey
Belyaev, Denis A.
Bertaux, Jean-Loup
Olsen, Kevin S.
Baggio, Lucio
Alday, Juan
Ivanov, Yuriy S.
Ristic, Bojan
Mason, Jon
Willame, Yannick
Depiesse, Cédric
Hetey, Laszlo
Berkenbosch, Sophie
Clairquin, Roland
Queirolo, Claudio
Beeckman, Bram
Neefs, Eddy
Patel, Manish R.
BELLUCCI, Giancarlo 
López-Moreno, Jose-Juan
Wilson, Colin F.
Etiope, Giuseppe
Zelenyi, Lev
Svedhem, Håkan
Vago, Jorge L.
ACS Science Team
NOMAD Science Team
Alonso-Rodrigo, Gustavo
ALTIERI, FRANCESCA 
Anufreychik, Konstantin
Arnold, Gabriele
Bauduin, Sophie
Bolsée, David
CARROZZO, FILIPPO GIACOMO 
Clancy, R. Todd
CLOUTIS, EDWARD
Crismani, Matteo
da Pieve, Fabiana
D'AVERSA, EMILIANO
Duxbury, Natalia
Encrenaz, Therese
Fouchet, Thierry
Funke, Bernd
Fussen, Didier
Garcia-Comas, Maia
Gérard, Jean-Claude
GIURANNA, MARCO 
Gkouvelis, Leo
Gonzalez-Galindo, Francisco
GRASSI, Davide 
Guerlet, Sandrine
Hartogh, Paul
Holmes, James
Hubert, Benoît
Kaminski, Jacek
Karatekin, Ozgur
Issue Date: 2019
Journal: NATURE 
Number: 568
Issue: 7753
First Page: 517
Abstract: The detection of methane on Mars has been interpreted as indicating that geochemical or biotic activities could persist on Mars today<SUP>1</SUP>. A number of different measurements of methane show evidence of transient, locally elevated methane concentrations and seasonal variations in background methane concentrations<SUP>2-5</SUP>. These measurements, however, are difficult to reconcile with our current understanding of the chemistry and physics of the Martian atmosphere<SUP>6,7</SUP>, which—given methane's lifetime of several centuries—predicts an even, well mixed distribution of methane<SUP>1,6,8</SUP>. Here we report highly sensitive measurements of the atmosphere of Mars in an attempt to detect methane, using the ACS and NOMAD instruments onboard the ESA-Roscosmos ExoMars Trace Gas Orbiter from April to August 2018. We did not detect any methane over a range of latitudes in both hemispheres, obtaining an upper limit for methane of about 0.05 parts per billion by volume, which is 10 to 100 times lower than previously reported positive detections<SUP>2,4</SUP>. We suggest that reconciliation between the present findings and the background methane concentrations found in the Gale crater<SUP>4</SUP> would require an unknown process that can rapidly remove or sequester methane from the lower atmosphere before it spreads globally.
URI: http://hdl.handle.net/20.500.12386/28635
URL: https://www.nature.com/articles/s41586-019-1096-4
ISSN: 0028-0836
DOI: 10.1038/s41586-019-1096-4
Bibcode ADS: 2019Natur.568..517K
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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Nature 41586-019-1096-4.pdf[Administrators only]4.35 MBAdobe PDF
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