Thermal Conductivity of the Martian Soil at the InSight Landing Site From HP3 Active Heating Experiments

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dc.contributor.authorGrott, M.en
dc.contributor.authorSpohn, T.en
dc.contributor.authorKnollenberg, J.en
dc.contributor.authorKrause, C.en
dc.contributor.authorHudson, T. L.en
dc.contributor.authorPiqueux, S.en
dc.contributor.authorMueller, N.en
dc.contributor.authorGolombek, M.en
dc.contributor.authorVrettos, C.en
dc.contributor.authorMarteau, E.en
dc.contributor.authorNagihara, S.en
dc.contributor.authorMorgan, P.en
dc.contributor.authorMurphy, J. P.en
dc.contributor.authorSiegler, M.en
dc.contributor.authorKing, Scott D.en
dc.contributor.authorSmrekar, S. E.en
dc.contributor.authorBanerdt, W. B.en
dc.date.accessioned2024-01-17T19:55:01Zen
dc.date.available2024-01-17T19:55:01Zen
dc.date.issued2021-07-14en
dc.description.abstractThe heat flow and physical properties package (HP3) of the InSight Mars mission is an instrument package designed to determine the martian planetary heat flow. To this end, the package was designed to emplace sensors into the martian subsurface and measure the thermal conductivity as well as the geothermal gradient in the 0–5 m depth range. After emplacing the probe to a tip depth of 0.37 m, a first reliable measurement of the average soil thermal conductivity in the 0.03–0.37 m depth range was performed. Using the HP3 mole as a modified line heat source, we determined a soil thermal conductivity of 0.039 ± 0.002 W m−1 K−1, consistent with the results of orbital and in-situ thermal inertia estimates. This low thermal conductivity implies that 85%–95% of all particles are smaller than 104–173 μm and suggests that soil cementation is minimal, contrary to the considerable degree of cementation suggested by image data. Rather, cementing agents like salts could be distributed in the form of grain coatings instead. Soil densities compatible with the measurements are (Formula presented.) kg m−3, indicating soil porosities of (Formula presented.) %.en
dc.description.versionPublished versionen
dc.format.extent16 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifierARTN e2021JE006861 (Article number)en
dc.identifier.doihttps://doi.org/10.1029/2021JE006861en
dc.identifier.eissn2169-9100en
dc.identifier.issn2169-9097en
dc.identifier.issue7en
dc.identifier.orcidKing, Scott [0000-0002-9564-5164]en
dc.identifier.urihttps://hdl.handle.net/10919/117384en
dc.identifier.volume126en
dc.language.isoenen
dc.publisherAmerican Geophysical Unionen
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000679848100015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectcohesionen
dc.subjectheat flowen
dc.subjectMarsen
dc.subjectparticle sizeen
dc.subjectsoilen
dc.subjectthermal conductivityen
dc.titleThermal Conductivity of the Martian Soil at the InSight Landing Site From HP3 Active Heating Experimentsen
dc.title.serialJournal of Geophysical Research-Planetsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/Geosciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen

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