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Coupling ice-ocean interface models with global-scale ice shell evolution models applied to Jovian moon Europa

Rückriemen-Bez, Tina and Terschanski, Benjamin and Plesa, Ana-Catalina and Kowalski, Julia (2023) Coupling ice-ocean interface models with global-scale ice shell evolution models applied to Jovian moon Europa. EGU General Assembly 2023, 23-28 April 2023, Vienna, Austria. doi: 10.5194/egusphere-egu23-6803.

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Official URL: https://meetingorganizer.copernicus.org/EGU23/EGU23-6803.html


The astrobiological potential of the Jovian moon Europa has long been acknowledged [1]. Europa’s surface, icy shell, likely salty ocean, and silicate mantle play a key role in determining Europa’s habitability. In particular, the icy shell may harbor cracks and pockets filled with brine that could be niches for sustaining life. One major question is how and to which degree brines are incorporated into the ice shell and how they evolve. Global models of the ice shell resolving spatial scales of several hundred meters to kilometers are able to constrain the long term evolution of solid salt intrusions [e.g. 2] and potentially brines. Two-phase extensions in global models, however, have so far only been applied to pure water ice shells [3]. Since global ice shell models cannot capture the intake of brine at the ice-ocean interface due to the large scales they act on, they rely on boundary conditions that incorporate the physics of the interface. Meso-scale models of the ice-ocean interface [4, 5] operate on length scales of centimeters to meters. The transition between ice and seawater is treated as a mush containing a mix of solid and high-salinity brine, typically assumed to be in thermodynamic equilibrium [6]. Modern mushy-layer models [7] provide insight into the distribution of salt impurities [8]. We review inter-solver coupling strategies and discuss applicability to the coupling of the meso-scale ice-ocean interface and the planetary-scale convection. We propose a spatial homogenization of meso-scale simulation outputs and a Gauss-Seidel subcycling approach [9] to embed the fast into long-term variations. This work will lay the foundation for physically consistent scale-coupled evolution models of the cryohydrosphere of icy moons.

Item URL in elib:https://elib.dlr.de/196801/
Document Type:Conference or Workshop Item (Speech)
Title:Coupling ice-ocean interface models with global-scale ice shell evolution models applied to Jovian moon Europa
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Terschanski, BenjaminRWTH Aachen University, Chair of Methods for Model-based Development in Computational EngineeringUNSPECIFIEDUNSPECIFIED
Plesa, Ana-CatalinaUNSPECIFIEDhttps://orcid.org/0000-0003-3366-7621UNSPECIFIED
Kowalski, JuliaRWTH Aachen University, Aachen, GermanyUNSPECIFIEDUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:EGU23-6803
Keywords:Europa, Ice shell models, Coupling ice-ocean interface
Event Title:EGU General Assembly 2023
Event Location:Vienna, Austria
Event Type:international Conference
Event Dates:23-28 April 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System, R - Planetary Evolution and Life, R - Project JUICE - JANUS and GALA
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Physics
Deposited By: Plesa, Dr. Ana-Catalina
Deposited On:31 Aug 2023 12:46
Last Modified:31 Aug 2023 12:46

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