Convection in Thin Shells of Icy Satellites: Effects of Latitudinal Surface Temperature Variations.
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| Title: | Convection in Thin Shells of Icy Satellites: Effects of Latitudinal Surface Temperature Variations. |
|---|---|
| Authors: | Weller, Matthew B.1,2 mbweller@brown.edu, Fuchs, Lukas1,3, Becker, Thorsten W.1,4, Soderlund, Krista M.1 |
| Source: | Journal of Geophysical Research. Planets. Aug2019, Vol. 124 Issue 8, p2029-2053. 25p. |
| Subject Terms: | *Convection (Meteorology), Heat flow (Oceanography), Luminosity, Convective flow |
| Geographic Terms: | Equator |
| Abstract: | We use three-dimensional numerical experiments of thin shell convection to explore what effects an expected latitudinal variation in solar insolation may have on a convection. We find that a global flow pattern of upwelling equatorial regions and downwelling polar regions, linked to higher and lower surface temperatures (Ts), respectively, is preferred. Due to the gradient in Ts, boundary layer thicknesses vary from equatorial lows to polar highs, and polar oriented flow fields are established. A Hadley cell-type configuration with two hemispheric-scale convective cells emerges with heat flow enhanced along the equator and suppressed poleward. The poleward transport pattern appears robust under a range of basal and mixed heating, isoviscous and temperature-dependent viscosity, vigor of convection, and different degrees of Ts variations. Our findings suggest that a latitudinal variation in Ts is an important effect for convection within the thin ice shells of the outer satellites, becoming increasingly important as solar luminosity increases. Variable Ts models predict lower heat flow and a more compressional regime near downwellings at higher latitudes, and higher heat flow and a more extensional regime near the equator. Within the ice shell, Hadley style flow could lead to large-scale anisotropic ice properties that might be detectable with future seismic or electro-magnetic observations. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Geophysical Research. Planets is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | GreenFILE |
| FullText | Text: Availability: 0 |
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| Header | DbId: 8gh DbLabel: GreenFILE An: 139343514 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Convection in Thin Shells of Icy Satellites: Effects of Latitudinal Surface Temperature Variations. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Weller%2C+Matthew+B%2E%22">Weller, Matthew B.</searchLink><relatesTo>1,2</relatesTo><i> mbweller@brown.edu</i><br /><searchLink fieldCode="AR" term="%22Fuchs%2C+Lukas%22">Fuchs, Lukas</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Becker%2C+Thorsten+W%2E%22">Becker, Thorsten W.</searchLink><relatesTo>1,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Soderlund%2C+Krista+M%2E%22">Soderlund, Krista M.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Geophysical+Research%2E+Planets%22">Journal of Geophysical Research. Planets</searchLink>. Aug2019, Vol. 124 Issue 8, p2029-2053. 25p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Convection+%28Meteorology%29%22">Convection (Meteorology)</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+flow+%28Oceanography%29%22">Heat flow (Oceanography)</searchLink><br /><searchLink fieldCode="DE" term="%22Luminosity%22">Luminosity</searchLink><br /><searchLink fieldCode="DE" term="%22Convective+flow%22">Convective flow</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Equator%22">Equator</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We use three-dimensional numerical experiments of thin shell convection to explore what effects an expected latitudinal variation in solar insolation may have on a convection. We find that a global flow pattern of upwelling equatorial regions and downwelling polar regions, linked to higher and lower surface temperatures (Ts), respectively, is preferred. Due to the gradient in Ts, boundary layer thicknesses vary from equatorial lows to polar highs, and polar oriented flow fields are established. A Hadley cell-type configuration with two hemispheric-scale convective cells emerges with heat flow enhanced along the equator and suppressed poleward. The poleward transport pattern appears robust under a range of basal and mixed heating, isoviscous and temperature-dependent viscosity, vigor of convection, and different degrees of Ts variations. Our findings suggest that a latitudinal variation in Ts is an important effect for convection within the thin ice shells of the outer satellites, becoming increasingly important as solar luminosity increases. Variable Ts models predict lower heat flow and a more compressional regime near downwellings at higher latitudes, and higher heat flow and a more extensional regime near the equator. Within the ice shell, Hadley style flow could lead to large-scale anisotropic ice properties that might be detectable with future seismic or electro-magnetic observations. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Geophysical Research. Planets is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1029/2018JE005799 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 25 StartPage: 2029 Subjects: – SubjectFull: Convection (Meteorology) Type: general – SubjectFull: Heat flow (Oceanography) Type: general – SubjectFull: Luminosity Type: general – SubjectFull: Convective flow Type: general – SubjectFull: Equator Type: general Titles: – TitleFull: Convection in Thin Shells of Icy Satellites: Effects of Latitudinal Surface Temperature Variations. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Weller, Matthew B. – PersonEntity: Name: NameFull: Fuchs, Lukas – PersonEntity: Name: NameFull: Becker, Thorsten W. – PersonEntity: Name: NameFull: Soderlund, Krista M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 21699097 Numbering: – Type: volume Value: 124 – Type: issue Value: 8 Titles: – TitleFull: Journal of Geophysical Research. Planets Type: main |
| ResultId | 1 |
