View in EDS HTML Full Text PDF Full Text

Tropical Cyclone Favorability for Earth-Like and Titan-Like Regimes.

Saved in:
Bibliographic Details
Title: Tropical Cyclone Favorability for Earth-Like and Titan-Like Regimes.
Authors: Moore, David C.1 (AUTHOR) dmoore14@ucla.edu, Mitchell, Jonathan L.1,2 (AUTHOR)
Source: Journal of the Atmospheric Sciences. Mar2026, Vol. 83 Issue 3, p321-339. 19p.
Subjects: Cyclogenesis, Titan (Satellite), Methane, Atmospheric models, Tropical cyclones, Planetary atmospheres, Atmosphere, Atmospheric circulation
Abstract: Tropical cyclones in Earth's atmosphere form due to a combination of warm ocean waters, high atmospheric humidity, persistent deep convection, and preexisting low-level vorticity. Although Saturn's largest moon, Titan, has a global Earth-like tropical climate with a volatile methane cycle and sufficient convective activity to power the energetics of a mature cyclone, no such storm has yet been observed. Previous work has suggested that Titan's polar lakes could be suitable for tropical cyclone development, based on inferences of low-level absolute vorticity and surface heat fluxes. However, key background variables, such as temperature and specific humidity, differ between the atmospheres of Earth and Titan, making direct comparisons difficult. By systematically varying rotation rate, condensable volatility, and equatorial landmass, we reveal how modest adjustments to planetary parameters can restructure the balance between dynamical forcing, thermodynamic potential, and environmental ventilation. The picture that emerges is one in which Earth-like systems naturally support broad regions of cyclogenesis in the deep tropics, whereas Titan-like systems shift environmental favorability to narrow, poleward bands where vorticity, air–sea disequilibrium, and atmospheric moisture align only episodically. These results not only refine our understanding of Titan's potential for tropical cyclone activity but also highlight the sensitivity of cyclogenesis pathways to planetary-scale controls. More broadly, the framework developed here provides a new foundation for exploring cyclone-favorable climates across a wide range of terrestrial worlds, underscoring that the familiar paradigms of Earth's tropical cyclone behavior may represent just one expression within a much wider spectrum of atmospheric possibilities. Significance Statement: Tropical cyclones are vital to Earth's climate, yet their presence on other planets is poorly understood. Here, we ask the question: How does the variation of planetary parameters affect the large-scale favorability of tropical cyclones between Earth-like and Titan-like states? Using a global climate model, we transform an Earth-like aquaplanet into a Titan-like planet by varying rotation rate, water vapor concentration, and equatorial landmass width. By systematically varying these parameters, we reveal how modest adjustments to planetary parameters can restructure the balance between dynamical forcing, thermodynamic potential, and environmental ventilation. The picture that emerges is one in which Earth-like systems naturally support broad regions of cyclogenesis in the deep tropics, whereas Titan-like systems shift environmental favorability to narrow, poleward bands where vorticity, air–sea disequilibrium, and atmospheric moisture align only episodically. These results not only refine our understanding of Titan's potential for tropical cyclone activity but also highlight the sensitivity of cyclogenesis pathways to planetary-scale controls. More broadly, the framework developed here provides a new foundation for exploring cyclone-favorable climates across a wide range of terrestrial worlds, underscoring that the familiar paradigms of Earth's tropical cyclone behavior may represent just one expression within a much wider spectrum of atmospheric possibilities. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Atmospheric Sciences is the property of American Meteorological Society 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: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 192793006
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Tropical Cyclone Favorability for Earth-Like and Titan-Like Regimes.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Moore%2C+David+C%2E%22">Moore, David C.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dmoore14@ucla.edu</i><br /><searchLink fieldCode="AR" term="%22Mitchell%2C+Jonathan+L%2E%22">Mitchell, Jonathan L.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Atmospheric+Sciences%22">Journal of the Atmospheric Sciences</searchLink>. Mar2026, Vol. 83 Issue 3, p321-339. 19p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Cyclogenesis%22">Cyclogenesis</searchLink><br /><searchLink fieldCode="DE" term="%22Titan+%28Satellite%29%22">Titan (Satellite)</searchLink><br /><searchLink fieldCode="DE" term="%22Methane%22">Methane</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+models%22">Atmospheric models</searchLink><br /><searchLink fieldCode="DE" term="%22Tropical+cyclones%22">Tropical cyclones</searchLink><br /><searchLink fieldCode="DE" term="%22Planetary+atmospheres%22">Planetary atmospheres</searchLink><br /><searchLink fieldCode="DE" term="%22Atmosphere%22">Atmosphere</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+circulation%22">Atmospheric circulation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Tropical cyclones in Earth's atmosphere form due to a combination of warm ocean waters, high atmospheric humidity, persistent deep convection, and preexisting low-level vorticity. Although Saturn's largest moon, Titan, has a global Earth-like tropical climate with a volatile methane cycle and sufficient convective activity to power the energetics of a mature cyclone, no such storm has yet been observed. Previous work has suggested that Titan's polar lakes could be suitable for tropical cyclone development, based on inferences of low-level absolute vorticity and surface heat fluxes. However, key background variables, such as temperature and specific humidity, differ between the atmospheres of Earth and Titan, making direct comparisons difficult. By systematically varying rotation rate, condensable volatility, and equatorial landmass, we reveal how modest adjustments to planetary parameters can restructure the balance between dynamical forcing, thermodynamic potential, and environmental ventilation. The picture that emerges is one in which Earth-like systems naturally support broad regions of cyclogenesis in the deep tropics, whereas Titan-like systems shift environmental favorability to narrow, poleward bands where vorticity, air–sea disequilibrium, and atmospheric moisture align only episodically. These results not only refine our understanding of Titan's potential for tropical cyclone activity but also highlight the sensitivity of cyclogenesis pathways to planetary-scale controls. More broadly, the framework developed here provides a new foundation for exploring cyclone-favorable climates across a wide range of terrestrial worlds, underscoring that the familiar paradigms of Earth's tropical cyclone behavior may represent just one expression within a much wider spectrum of atmospheric possibilities. Significance Statement: Tropical cyclones are vital to Earth's climate, yet their presence on other planets is poorly understood. Here, we ask the question: How does the variation of planetary parameters affect the large-scale favorability of tropical cyclones between Earth-like and Titan-like states? Using a global climate model, we transform an Earth-like aquaplanet into a Titan-like planet by varying rotation rate, water vapor concentration, and equatorial landmass width. By systematically varying these parameters, we reveal how modest adjustments to planetary parameters can restructure the balance between dynamical forcing, thermodynamic potential, and environmental ventilation. The picture that emerges is one in which Earth-like systems naturally support broad regions of cyclogenesis in the deep tropics, whereas Titan-like systems shift environmental favorability to narrow, poleward bands where vorticity, air–sea disequilibrium, and atmospheric moisture align only episodically. These results not only refine our understanding of Titan's potential for tropical cyclone activity but also highlight the sensitivity of cyclogenesis pathways to planetary-scale controls. More broadly, the framework developed here provides a new foundation for exploring cyclone-favorable climates across a wide range of terrestrial worlds, underscoring that the familiar paradigms of Earth's tropical cyclone behavior may represent just one expression within a much wider spectrum of atmospheric possibilities. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Atmospheric Sciences is the property of American Meteorological Society 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=192793006
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1175/JAS-D-25-0096.1
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 19
        StartPage: 321
    Subjects:
      – SubjectFull: Cyclogenesis
        Type: general
      – SubjectFull: Titan (Satellite)
        Type: general
      – SubjectFull: Methane
        Type: general
      – SubjectFull: Atmospheric models
        Type: general
      – SubjectFull: Tropical cyclones
        Type: general
      – SubjectFull: Planetary atmospheres
        Type: general
      – SubjectFull: Atmosphere
        Type: general
      – SubjectFull: Atmospheric circulation
        Type: general
    Titles:
      – TitleFull: Tropical Cyclone Favorability for Earth-Like and Titan-Like Regimes.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Moore, David C.
      – PersonEntity:
          Name:
            NameFull: Mitchell, Jonathan L.
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00224928
          Numbering:
            – Type: volume
              Value: 83
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Journal of the Atmospheric Sciences
              Type: main
ResultId 1