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  • Presentation | P41B: Io, Europa, and Ganymede in the Eyes of Juno II Oral
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  • P41B-01: JWST Observes Europa’s Evolving Surface Composition (invited)
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Author(s):
Richard Cartwright, Johns Hopkins University Applied Physics Laboratory (First Author, Presenting Author)
Charles Hibbitts, Johns Hopkins University Applied Physics Laboratory
Bryan Holler, Space Telescope Science Institute
Ujjwal Raut, Southwest Research Institute
Tom Andre Nordheim, Johns Hopkins University Applied Physics Laboratory
Marc Neveu, NASA Goddard Space Flight Center
Silvia Protopapa, Southwest Research Institute
Christopher Glein, Southwest Research Institute
Erin Leonard, NASA Jet Propulsion Laboratory, California Institute of Technology
Lorenz Roth, KTH Royal Institute of Technology
Chloe Beddingfield, Johns Hopkins University Applied Physics Laboratory
Geronimo Villanueva, NASA Goddard Space Flight Center


Water ice on Europa's surface is continually modified by competing thermal and irradiation processes. We analyzed JWST data that highlight this competition, finding that exposed water ice is primarily crystalline in regions dominated by chaos terrains, in particular in the relatively dark and warm Tara Regio. In contrast, brighter and colder regions on Europa's leading hemisphere are primarily mantled by a thin layer of amorphous ice.



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