Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/27008
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dc.contributor.authorPaton, Mark Den_UK
dc.contributor.authorHarri, Ari-Mattien_UK
dc.contributor.authorSavijarvi, Hannuen_UK
dc.contributor.authorMakinen, Teemuen_UK
dc.contributor.authorHagermann, Axelen_UK
dc.contributor.authorKemppinen, Oskuen_UK
dc.contributor.authorJohnston, Andrewen_UK
dc.date.accessioned2018-04-15T00:14:49Z-
dc.date.available2018-04-15T00:14:49Z-
dc.date.issued2016-06en_UK
dc.identifier.urihttp://hdl.handle.net/1893/27008-
dc.description.abstractAs Viking Lander 1 touched down on Mars one of its footpads fully penetrated a patch of loose fine-grained drift material. The surrounding landing site, as observed by VL-1, was found to exhibit a complex terrain consisting of a crusted surface with an assortment of rocks, large dune-like drifts and smaller patches of drift material. We use a temperature sensor attached to the buried footpad and covered in fine-grained material to determine the thermal properties of drift material at the VL-1 site. The thermal properties are used to investigate the microstructure of the drift material and understand its relevance to surface-atmosphere interactions. We obtained a thermal inertia value of 103 ± 22 tiu. This value is in the upper range of previous thermal inertia estimates of martian dust as measured from orbit and is significantly lower than the regional thermal inertia of the VL-1 site, of around 283 tiu, obtained from orbit. We estimate a thermal inertia of around 263 ± 29 tiu for the duricrust at the VL-1 site. It was noted the patch of fine-grained regolith around the footpad was about 20-30 K warmer compared to similar material beyond the thermal influence of the lander. An effective diameter of 8 ± 5 μm was calculated for the particles in the drift material. This is larger than atmospheric dust and large compared to previous estimates of the drift material particle diameter. We interpret our results as the presence of a range of particle sizes, <8 μm, in the drift material with the thermal properties being controlled by a small amount of large particles (~8 μm) and its cohesion being controlled by a large amount of smaller particles. The bulk of the particles in the drift material are therefore likely comparable in size to that of atmospheric dust. The possibility of larger particles being locked into a fine-grained material has implications for understanding the mobilisation of wind blown materials on Mars. © 2016 Elsevier Inc.en_UK
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.relationPaton MD, Harri A, Savijarvi H, Makinen T, Hagermann A, Kemppinen O & Johnston A (2016) Thermal and microstructural properties of fine-grained material at the Viking Lander 1 site. Icarus, 271, pp. 360-374. https://doi.org/10.1016/j.icarus.2016.02.012en_UK
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.rights.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserveden_UK
dc.subjectMarsen_UK
dc.subjectAtmospheresen_UK
dc.subjectDynamicsen_UK
dc.subjectGeophysicsen_UK
dc.subjectRegolithsen_UK
dc.titleThermal and microstructural properties of fine-grained material at the Viking Lander 1 siteen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate2999-12-24en_UK
dc.rights.embargoreason[1-s2.0-S0019103516000786-main.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.identifier.doi10.1016/j.icarus.2016.02.012en_UK
dc.citation.jtitleIcarusen_UK
dc.citation.issn0019-1035en_UK
dc.citation.volume271en_UK
dc.citation.spage360en_UK
dc.citation.epage374en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emailaxel.hagermann@stir.ac.uken_UK
dc.citation.date23/02/2016en_UK
dc.contributor.affiliationFinnish Meteorological Instituteen_UK
dc.contributor.affiliationFinnish Meteorological Instituteen_UK
dc.contributor.affiliationUniversity of Helsinkien_UK
dc.contributor.affiliationFinnish Meteorological Instituteen_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationFinnish Meteorological Instituteen_UK
dc.contributor.affiliationSmithsonian National Air and Space Museumen_UK
dc.identifier.isiWOS:000373651800028en_UK
dc.identifier.scopusid2-s2.0-84959378446en_UK
dc.identifier.wtid878259en_UK
dc.contributor.orcid0000-0002-1818-9396en_UK
dc.date.accepted2016-02-04en_UK
dcterms.dateAccepted2016-02-04en_UK
dc.date.filedepositdate2018-04-12en_UK
rioxxterms.apcnot requireden_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorPaton, Mark D|en_UK
local.rioxx.authorHarri, Ari-Matti|en_UK
local.rioxx.authorSavijarvi, Hannu|en_UK
local.rioxx.authorMakinen, Teemu|en_UK
local.rioxx.authorHagermann, Axel|0000-0002-1818-9396en_UK
local.rioxx.authorKemppinen, Osku|en_UK
local.rioxx.authorJohnston, Andrew|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate2999-12-24en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filename1-s2.0-S0019103516000786-main.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0019-1035en_UK
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