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An attempt to detec...
An attempt to detect transient changes in Io's SO2 and NaCl atmosphere
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- Roth, Lorenz (författare)
- KTH,Rymd- och plasmafysik
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- Boissier, Jeremie (författare)
- IRAM, 300 Rue Piscine, F-38406 Grenoble, France.
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- Moullet, Arielle (författare)
- NASA, Ames Res Ctr, Space Sci Div, Moffett Field, CA 94035 USA.
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- Sanchez-Monge, Alvaro (författare)
- Univ Cologne, Phys Inst 1, Zulpicher Str 77, Cologne, Germany.
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- de Kleer, Katherine (författare)
- CALTECH, 1200 E Calif Blvd M-C 150-21, Pasadena, CA 91125 USA.
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- Yoneda, Mizuki (författare)
- Tadano Ltd, Takamatsu, Kagawa, Japan.
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- Hikida, Reina (författare)
- Univ Tokyo, Dept Earth & Planetary Sci, Tokyo, Japan.
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- Kita, Hajime (författare)
- Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Tokyo, Japan.
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- Tsuchiya, Fuminori (författare)
- Tohoku Univ, Grad Sch Sci, Sendai, Miyagi, Japan.
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- Blöcker, Aljona (författare)
- KTH,Rymd- och plasmafysik
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- Gladstone, G. Randall (författare)
- Southwest Res Inst, San Antonio, TX 78238 USA.
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- Grodent, Denis (författare)
- Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium.
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- Ivchenko, Nickolay, 1976- (författare)
- KTH,Rymd- och plasmafysik
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- Lellouch, Emmanuel (författare)
- Univ Paris 07, UPMC Univ Paris 06, Sorbonne Paris Cite, LESIA Observ Paris,CNRS, Meudon, France.
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- Retherford, Kurt D. (författare)
- Southwest Res Inst, San Antonio, TX 78238 USA.
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- Saur, Joachim (författare)
- Univ Cologne, Inst Geophys & Meteorol, Albertus Magnus Pl, D-50923 Cologne, Germany.
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- Schilke, Peter (författare)
- Univ Cologne, Phys Inst 1, Zulpicher Str 77, Cologne, Germany.
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- Strobel, Darrell (författare)
- Johns Hopkins Univ, Baltimore, MD USA.
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- Thorwirth, Sven (författare)
- Univ Cologne, Phys Inst 1, Zulpicher Str 77, Cologne, Germany.
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(creator_code:org_t)
- Elsevier BV, 2020
- 2020
- Engelska.
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Ingår i: Icarus. - : Elsevier BV. - 0019-1035 .- 1090-2643. ; 350
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Io's atmosphere is predominately SO2 that is sustained by a combination of volcanic outgassing and sublimation. The loss from the atmosphere is the main mass source for Jupiter's large magnetosphere. Numerous previous studies attributed various transient phenomena in Io's environment and Jupiter's magnetosphere to a sudden change in the mass loss from the atmosphere supposedly triggered by a change in volcanic activity. Since the gas in volcanic plumes does not escape directly, such causal correlation would require a transient volcano-induced change in atmospheric abundance, which has never been observed so far. Here we report four observations of atmospheric SO2 and NaCl from the same hemisphere of Io, obtained with the IRAM NOEMA interferometer on 11 December 2016, 14 March, 6 and 29 April 2017. These observations are compared to measurements of volcanic hot spots and Io's neutral and plasma environment. We find a stable NaCl column density in Io's atmosphere on the four dates. The SO2 column density derived for December 2016 is about 30% lower compared to the SO2 column density found in the period of March to April 2017. This increase in SO2 from December 2016 to March 2017 might be related to increasing volcanic activity observed at several sites in spring 2017, but the stability of the volcanic trace gas NaCl and resulting decrease in NaCl/SO2 ratio do not support this interpretation. Observed dimmings in both the sulfur ion torus and Na neutral cloud suggest rather a decrease in mass loading in the period of increasing SO2 abundance. The dimming Na brightness and stable atmospheric NaCl furthermore dispute an earlier suggested positive correlation of the sodium cloud and the hot spot activity at Loki Patara, which considerably increased in this period. The environment of Io overall appears to be in a rather quiescent state, preventing further conclusions. Only Jupiter's aurora morphology underwent several short-term changes, which are apparently unrelated to Io's quiescent environment or the relatively stable atmosphere.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Nyckelord
- Io's atmosphere
- Volcanic activity
- Magnetospheric variability
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Roth, Lorenz
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Boissier, Jeremi ...
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Moullet, Arielle
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Sanchez-Monge, A ...
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de Kleer, Kather ...
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Yoneda, Mizuki
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Hikida, Reina
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Kita, Hajime
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Tsuchiya, Fumino ...
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Blöcker, Aljona
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Gladstone, G. Ra ...
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Grodent, Denis
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Ivchenko, Nickol ...
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Lellouch, Emmanu ...
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Retherford, Kurt ...
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Saur, Joachim
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Schilke, Peter
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Strobel, Darrell
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Thorwirth, Sven
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