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| Titel |
CHIC - Coupling Habitability, Interior and Crust |
| VerfasserIn |
Lena Noack, Francois Labbe, Thomas Boiveau, Attilio Rivoldini, Tim Van Hoolst |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086579
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| Publikation (Nr.) |
 EGU/EGU2014-471.pdf |
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| Zusammenfassung |
| We present a new code developed for simulating convection in terrestrial planets and icy
moons.
The code CHIC is written in Fortran and employs the finite volume method and finite
difference method for solving energy, mass and momentum equations in either silicate or icy
mantles. The code uses either Cartesian (2D and 3D box) or spherical coordinates (2D
cylinder or annulus).
It furthermore contains a 1D parametrised model to obtain temperature profiles in specific
regions, for example in the iron core or in the silicate mantle (solving only the energy
equation). The 2D/3D convection model uses the same input parameters as the 1D model,
which allows for comparison of the different models and adaptation of the 1D model, if
needed.
The code has already been benchmarked for the following aspects:
– viscosity-dependent rheology (Blankenbach et al., 1989)
– pseudo-plastic deformation (Tosi et al., in preparation phase)
– subduction mechanism and plastic deformation (Quinquis et al., in preparation
phase)
New features that are currently developed and benchmarked include:
– compressibility (following King et al., 2009 and Leng and Zhong, 2008)
– different melt modules (Plesa et al., in preparation phase)
– freezing of an inner core (comparison with GAIA code, Huettig and Stemmer,
2008)
– build-up of oceanic and continental crust (Noack et al., in preparation phase)
The code represents a useful tool to couple the interior with the surface of a planet (e.g.
via build-up and erosion of crust) and it’s atmosphere (via outgassing on the one
hand and subduction of hydrated crust and carbonates back into the mantle). It will
be applied to investigate several factors that might influence the habitability of a
terrestrial planet, and will also be used to simulate icy bodies with high-pressure ice
phases.
References:
Blankenbach et al. (1989). A benchmark comparison for mantle convection
codes. GJI 98, 23-38.
Huettig and Stemmer (2008). Finite volume discretization for dynamic
viscosities on Voronoi grids. PEPI 171(1-4), 137-146.
King et al. (2009). A Community Benchmark for 2D Cartesian Compressible
Convection in the Earth’s Mantle. GJI 179, 1-11.
Leng and Zhong (2008). Viscous heating, adiabatic heating and energetic
consistency in compressible mantle convection. GJI 173, 693-702. |
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