Radar attenuation in Europa's ice shell: Obstacles and opportunities for constraining the shell thickness and its thermal structure
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10360835" target="_blank" >RIV/00216208:11320/17:10360835 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/2016JE005110" target="_blank" >http://dx.doi.org/10.1002/2016JE005110</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2016JE005110" target="_blank" >10.1002/2016JE005110</a>
Alternative languages
Result language
angličtina
Original language name
Radar attenuation in Europa's ice shell: Obstacles and opportunities for constraining the shell thickness and its thermal structure
Original language description
Young surface and possible recent endogenic activity make Europa one of the most exciting solar system bodies and a primary target for spacecraft exploration. Future Europa missions are expected to carry ice-penetrating radar instruments designed to investigate its subsurface thermophysical structure. Several authors have addressed the radar sounders' performance at icy moons, often ignoring the complex structure of a realistic ice shell. Here we explore the variation in two-way radar attenuation for a variety of potential thermal structures of Europa's shell (determined by reference viscosity, activation energy, tidal heating, surface temperature, and shell thickness) as well as for low and high loss temperature-dependent attenuation model. We found that (i) for all investigated ice shell thicknesses (5-30km), the radar sounder will penetrate between 15% and 100% of the total thickness, (ii) the maximum penetration depth varies laterally, with deepest penetration possible through cold downwellings, (iii) direct ocean detection might be possible for shells of up to 15km thick if the signal travels through cold downwelling ice or the shell is conductive, (iv) even if the ice/ocean interface is not directly detected, penetration through most of the shell could constrain the deep shell structure through returns from deep non-ocean interfaces or the loss of signal itself, and (v) for all plausible ice shells, the two-way attenuation to the eutectic point is less than or similar to 30dB which shows a robust potential for longitudinal investigation of the ice shell's shallow thermophysical structure.
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
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research: Planets
ISSN
2169-9097
e-ISSN
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Volume of the periodical
122
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
524-545
UT code for WoS article
000399652100004
EID of the result in the Scopus database
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