Academic Journal
Προβολή σε EDS

How high are Jupiter’s clouds? From high-resolution JunoCam images to a multi-wavelength analysis

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: How high are Jupiter’s clouds? From high-resolution JunoCam images to a multi-wavelength analysis
Συγγραφείς: Tristan Guillot, Francesco Biagiotti, Grassi Davide, Wong Mike, Fletcher Leigh, Orton Glenn, Gerald Eichstaedt, Marylyn Rosenqvist, Shawn Brueshaber, Candy Hansen, Caleb Keaveney, Kevin Kelly, Tom Momary, Jonathan Lunine, Scott Bolton
Στοιχεία εκδότη: Copernicus GmbH, 2025.
Έτος έκδοσης: 2025
Θεματικοί όροι: 13. Climate action
Περιγραφή: Last year, we showed that JunoCam images, acquired in the visible, have the resolution necessary to measure the height of clouds from their projected shadows. We focused our analysis on the “Nautilus”, a 3000-km cyclonic vortex seen during Juno’s 14th periojove. That structure consists mainly of a spiraling counter clockwise white cloud that casts a shadow onto a reddish cloud deck∼20 to 30 km below. Small individual clouds also pop out of the white cloud deck, towering about ~10 to 20 km above it. An analysis of near-simultaneous HST images of the Nautilus confirms that the white region is higher than its surrounding darker, reddish cloud deck. These respective elevations are consistent with the white clouds being made of fresh ammonia ice while most of the reddish clouds underneath are made of ammonium hydrosulfide NH4SH, as predicted by equilibrium cloud models.An analysis by F. Biagiotti of a similar region observed by JIRAM during Juno’s 1st perijove identifies the presence of elusive ammonia ice crystals, either pure or mixed with a nitrogen-bearing species similar to Titan’s tholins. In addition, these clouds have altitudes that are consistent with the above interpretation. However, the surrounding material is not much deeper and incompatible with NH4SH. We discuss a possible solution to the corundum: At least in the gas, the atmosphere's optical thickness is much larger at the wavelengths used for the JIRAM study (2 to 3.2 micron) than in the visible. The effect of scattering by cloud particles is to be evaluated, but it appears likely that altogether, infrared observations at these wavelengths cannot penetrate as deep as visible ones.An interpretation of these observations, consistent with spectroscopic observations in the visible, is therefore that, at least in this region close to ~40°N, most of Jupiter's visible cloud deck is made of NH4SH, that updrafts can locally deliver fresh ammonia ice but that these ammonia ice crystals remain only for a short time either because of downwelling and evaporation or because of coating.
Τύπος εγγράφου: Article
DOI: 10.5194/egusphere-egu24-17351
Αριθμός Καταχώρησης: edsair.doi...........dc0fe694c3a65734e08df01bd47d593a
Βάση Δεδομένων: OpenAIRE
FullText Text:
  Availability: 0
Header DbId: edsair
DbLabel: OpenAIRE
An: edsair.doi...........dc0fe694c3a65734e08df01bd47d593a
RelevancyScore: 965
AccessLevel: 3
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 964.738464355469
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: How high are Jupiter’s clouds? From high-resolution JunoCam images to a multi-wavelength analysis
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Tristan+Guillot%22">Tristan Guillot</searchLink><br /><searchLink fieldCode="AR" term="%22Francesco+Biagiotti%22">Francesco Biagiotti</searchLink><br /><searchLink fieldCode="AR" term="%22Grassi+Davide%22">Grassi Davide</searchLink><br /><searchLink fieldCode="AR" term="%22Wong+Mike%22">Wong Mike</searchLink><br /><searchLink fieldCode="AR" term="%22Fletcher+Leigh%22">Fletcher Leigh</searchLink><br /><searchLink fieldCode="AR" term="%22Orton+Glenn%22">Orton Glenn</searchLink><br /><searchLink fieldCode="AR" term="%22Gerald+Eichstaedt%22">Gerald Eichstaedt</searchLink><br /><searchLink fieldCode="AR" term="%22Marylyn+Rosenqvist%22">Marylyn Rosenqvist</searchLink><br /><searchLink fieldCode="AR" term="%22Shawn+Brueshaber%22">Shawn Brueshaber</searchLink><br /><searchLink fieldCode="AR" term="%22Candy+Hansen%22">Candy Hansen</searchLink><br /><searchLink fieldCode="AR" term="%22Caleb+Keaveney%22">Caleb Keaveney</searchLink><br /><searchLink fieldCode="AR" term="%22Kevin+Kelly%22">Kevin Kelly</searchLink><br /><searchLink fieldCode="AR" term="%22Tom+Momary%22">Tom Momary</searchLink><br /><searchLink fieldCode="AR" term="%22Jonathan+Lunine%22">Jonathan Lunine</searchLink><br /><searchLink fieldCode="AR" term="%22Scott+Bolton%22">Scott Bolton</searchLink>
– Name: Publisher
  Label: Publisher Information
  Group: PubInfo
  Data: Copernicus GmbH, 2025.
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2025
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%2213%2E+Climate+action%22">13. Climate action</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: Last year, we showed that JunoCam images, acquired in the visible, have the resolution necessary to measure the height of clouds from their projected shadows. We focused our analysis on the “Nautilus”, a 3000-km cyclonic vortex seen during Juno’s 14th periojove. That structure consists mainly of a spiraling counter clockwise white cloud that casts a shadow onto a reddish cloud deck∼20 to 30 km below. Small individual clouds also pop out of the white cloud deck, towering about ~10 to 20 km above it. An analysis of near-simultaneous HST images of the Nautilus confirms that the white region is higher than its surrounding darker, reddish cloud deck. These respective elevations are consistent with the white clouds being made of fresh ammonia ice while most of the reddish clouds underneath are made of ammonium hydrosulfide NH4SH, as predicted by equilibrium cloud models.An analysis by F. Biagiotti of a similar region observed by JIRAM during Juno’s 1st perijove identifies the presence of elusive ammonia ice crystals, either pure or mixed with a nitrogen-bearing species similar to Titan’s tholins. In addition, these clouds have altitudes that are consistent with the above interpretation. However, the surrounding material is not much deeper and incompatible with NH4SH. We discuss a possible solution to the corundum: At least in the gas, the atmosphere's optical thickness is much larger at the wavelengths used for the JIRAM study (2 to 3.2 micron) than in the visible. The effect of scattering by cloud particles is to be evaluated, but it appears likely that altogether, infrared observations at these wavelengths cannot penetrate as deep as visible ones.An interpretation of these observations, consistent with spectroscopic observations in the visible, is therefore that, at least in this region close to ~40°N, most of Jupiter's visible cloud deck is made of NH4SH, that updrafts can locally deliver fresh ammonia ice but that these ammonia ice crystals remain only for a short time either because of downwelling and evaporation or because of coating.
– Name: TypeDocument
  Label: Document Type
  Group: TypDoc
  Data: Article
– Name: DOI
  Label: DOI
  Group: ID
  Data: 10.5194/egusphere-egu24-17351
– Name: AN
  Label: Accession Number
  Group: ID
  Data: edsair.doi...........dc0fe694c3a65734e08df01bd47d593a
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsair&AN=edsair.doi...........dc0fe694c3a65734e08df01bd47d593a
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.5194/egusphere-egu24-17351
    Languages:
      – Text: Undetermined
    Subjects:
      – SubjectFull: 13. Climate action
        Type: general
    Titles:
      – TitleFull: How high are Jupiter’s clouds? From high-resolution JunoCam images to a multi-wavelength analysis
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Tristan Guillot
      – PersonEntity:
          Name:
            NameFull: Francesco Biagiotti
      – PersonEntity:
          Name:
            NameFull: Grassi Davide
      – PersonEntity:
          Name:
            NameFull: Wong Mike
      – PersonEntity:
          Name:
            NameFull: Fletcher Leigh
      – PersonEntity:
          Name:
            NameFull: Orton Glenn
      – PersonEntity:
          Name:
            NameFull: Gerald Eichstaedt
      – PersonEntity:
          Name:
            NameFull: Marylyn Rosenqvist
      – PersonEntity:
          Name:
            NameFull: Shawn Brueshaber
      – PersonEntity:
          Name:
            NameFull: Candy Hansen
      – PersonEntity:
          Name:
            NameFull: Caleb Keaveney
      – PersonEntity:
          Name:
            NameFull: Kevin Kelly
      – PersonEntity:
          Name:
            NameFull: Tom Momary
      – PersonEntity:
          Name:
            NameFull: Jonathan Lunine
      – PersonEntity:
          Name:
            NameFull: Scott Bolton
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 20
              M: 01
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-locals
              Value: edsair
ResultId 1