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Double ridge formation over shallow water sills on Jupiter’s moon Europa

Author

Listed:
  • Riley Culberg

    (Stanford University)

  • Dustin M. Schroeder

    (Stanford University
    Stanford University)

  • Gregor Steinbrügge

    (Stanford University)

Abstract

Jupiter’s moon Europa is a prime candidate for extraterrestrial habitability in our solar system. The surface landforms of its ice shell express the subsurface structure, dynamics, and exchange governing this potential. Double ridges are the most common surface feature on Europa and occur across every sector of the moon, but their formation is poorly understood, with current hypotheses providing competing and incomplete mechanisms for the development of their distinct morphology. Here we present the discovery and analysis of a double ridge in Northwest Greenland with the same gravity-scaled geometry as those found on Europa. Using surface elevation and radar sounding data, we show that this double ridge was formed by successive refreezing, pressurization, and fracture of a shallow water sill within the ice sheet. If the same process is responsible for Europa’s double ridges, our results suggest that shallow liquid water is spatially and temporally ubiquitous across Europa’s ice shell.

Suggested Citation

  • Riley Culberg & Dustin M. Schroeder & Gregor Steinbrügge, 2022. "Double ridge formation over shallow water sills on Jupiter’s moon Europa," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-29458-3
    DOI: 10.1038/s41467-022-29458-3
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    References listed on IDEAS

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    1. R. T. Pappalardo & J. W. Head & R. Greeley & R. J. Sullivan & C. Pilcher & G. Schubert & W. B. Moore & M. H. Carr & J. M. Moore & M. J. S. Belton & D. L. Goldsby, 1998. "Geological evidence for solid-state convection in Europa's ice shell," Nature, Nature, vol. 391(6665), pages 365-368, January.
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