Seasonal Variations of Soil Thermal Conductivity at the InSight Landing Site

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dc.contributor.authorGrott, M.en
dc.contributor.authorPiqueux, S.en
dc.contributor.authorSpohn, T.en
dc.contributor.authorKnollenberg, J.en
dc.contributor.authorKrause, C.en
dc.contributor.authorMarteau, E.en
dc.contributor.authorHudson, T. L.en
dc.contributor.authorForget, F.en
dc.contributor.authorLange, L.en
dc.contributor.authorMueller, N.en
dc.contributor.authorGolombek, M.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.authorBanfield, D.en
dc.contributor.authorSmrekar, S. E.en
dc.contributor.authorBanerdt, W. B.en
dc.date.accessioned2023-08-24T14:48:32Zen
dc.date.available2023-08-24T14:48:32Zen
dc.date.issued2023-04en
dc.description.abstractThe heat flow and physical properties package measured soil thermal conductivity at the landing site in the 0.03-0.37 m depth range. Six measurements spanning solar longitudes from 8.0 degrees to 210.0 degrees were made and atmospheric pressure at the site was simultaneously measured using InSight's Pressure Sensor. We find that soil thermal conductivity strongly correlates with atmospheric pressure. This trend is compatible with predictions of the pressure dependence of thermal conductivity for unconsolidated soils under martian atmospheric conditions, indicating that heat transport through the pore filling gas is a major contributor to the total heat transport. Therefore, any cementation or induration of the soil sampled by the experiments must be minimal and soil surrounding the mole at depths below the duricrust is likely unconsolidated. Thermal conductivity data presented here are the first direct evidence that the atmosphere interacts with the top most meter of material on Mars.en
dc.description.notesThe design, building of and research into the HP3 has been supported by the German Aerospace Center DLR, by NASA, the OEAW, and the Polish Academy of Science. US government support is gratefully acknowledged. This research was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). This paper is InSight Contribution Number 306. Open Access funding enabled and organized by Projekt DEAL.en
dc.description.sponsorshipGerman Aerospace Center DLR; NASA; OEAW; Polish Academy of Science; US government; National Aeronautics and Space Administration [80NM0018D0004]; Projekt DEALen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1029/2023GL102975en
dc.identifier.eissn1944-8007en
dc.identifier.issn0094-8276en
dc.identifier.issue7en
dc.identifier.othere2023GL102975en
dc.identifier.urihttp://hdl.handle.net/10919/116105en
dc.identifier.volume50en
dc.language.isoenen
dc.publisherAmerican Geophysical Unionen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectInSighten
dc.subjectHP3en
dc.subjectthermal conductivityen
dc.subjectsoilen
dc.subjectheat transporten
dc.titleSeasonal Variations of Soil Thermal Conductivity at the InSight Landing Siteen
dc.title.serialGeophysical Research Lettersen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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