Two-phase convection in Ganymede's high-pressure ice layer - Implications for its geological evolution
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10384957" target="_blank" >RIV/00216208:11320/18:10384957 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.icarus.2017.07.018" target="_blank" >https://doi.org/10.1016/j.icarus.2017.07.018</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.icarus.2017.07.018" target="_blank" >10.1016/j.icarus.2017.07.018</a>
Alternative languages
Result language
angličtina
Original language name
Two-phase convection in Ganymede's high-pressure ice layer - Implications for its geological evolution
Original language description
Ganymede, the largest moon in the solar system, has a fully differentiated interior with a layer of high-pressure (HP) ice between its deep ocean and silicate mantle. In this paper, we study the dynamics of this layer using a numerical model of two-phase ice-water mixture in two-dimensional Cartesian geometry. While focusing on the generation of water at the silicate/HP ice interface and its upward migration towards the ocean, we investigate the effect of bottom heat flux, the layer thickness, and the HP ice viscosity and permeability. Our results suggest that melt can be generated at the silicate/HP ice interface for small layer thickness (less than or similar to 200 km) and high values of heat flux (greater than or similar to 20 mW m(-2)) and viscosity (greater than or similar to 10(15) Pa s). Once generated, the water is transported through the layer by the upwelling plumes. Depending on the vigor of convection, it stays liquid or it may freeze before melting again as the plume reaches the temperate (partially molten) layer at the boundary with the ocean. The thickness of this layer as well as the amount of melt that is extracted from it is controlled by the permeability of the HP ice. This process constitutes a means of transporting volatiles and salts that might have dissolved into the melt present at the silicate/HP ice interface. As the moon cools down, the HP ice layer becomes less permeable because the heat flux from the silicates decreases and the HP ice layer thickens.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
<a href="/en/project/GJ15-14263Y" target="_blank" >GJ15-14263Y: Generation of meltwater and transport processes in the ice shell of Europa</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Icarus
ISSN
0019-1035
e-ISSN
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Volume of the periodical
299
Issue of the periodical within the volume
January
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
133-147
UT code for WoS article
000412615700010
EID of the result in the Scopus database
2-s2.0-85026486803