globalchange  > 气候减缓与适应
DOI: 10.1002/2018JE005558
Scopus记录号: 2-s2.0-85046732724
论文题名:
Constraining the Potential Liquid Water Environment at Gale Crater, Mars
作者: Rivera-Valentín E.G.; Gough R.V.; Chevrier V.F.; Primm K.M.; Martínez G.M.; Tolbert M.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期:5
起始页码: 1156
结束页码: 1167
语种: 英语
Scopus关键词: albedo ; brine ; crater ; in situ measurement ; Mars ; relative humidity ; temperature ; terrain
英文摘要: The Mars Science Laboratory (MSL) Rover Environmental Monitoring Station (REMS) has now made continuous in situ meteorological measurements for several Martian years at Gale crater, Mars. Of importance in the search for liquid formation are REMS' measurements of ground temperature and in-air measurements of temperature and relative humidity, which is with respect to ice. Such data can constrain the surface and subsurface stability of brines. Here we use updated calibrations to REMS data and consistent relative humidity comparisons (i.e., with respect to liquid versus with respect to ice) to investigate the potential formation of surface and subsurface liquids throughout MSL's traverse. We specifically study the potential for the deliquescence of calcium perchlorate. Our data analysis suggests that surface brine formation is not favored within the first 1648 sols as there are only two times (sols 1232 and 1311) when humidity-temperature conditions were within error consistent with a liquid phase. On the other hand, modeling of the subsurface environment would support brine production in the shallow subsurface. Indeed, we find that the shallow subsurface for terrains with low thermal inertia (Γ≲300 J m−2 K−1 s−1/2) may be occasionally favorable to brine formation through deliquescence. Terrains with Γ≲300 J m−2 K−1 s−1/2 and albedos of ≳ 0.25 are the most apt to subsurface brine formation. Should brines form, they would occur around Ls 100°. Their predicted properties would not meet the Special nor Uncertain Region requirements, as such they would not be potential habitable environments to life as we know it. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113995
Appears in Collections:气候减缓与适应

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作者单位: Arecibo Observatory, Universities Space Research Association, Arecibo, Puerto Rico; Lunar and Planetary Institute, Universities Space Research Association, Houston, TX, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, CO, United States; Arkansas Center for Space and Planetary Sciences, University of Arkansas, Fayetteville, AR, United States; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States

Recommended Citation:
Rivera-Valentín E.G.,Gough R.V.,Chevrier V.F.,et al. Constraining the Potential Liquid Water Environment at Gale Crater, Mars[J]. Journal of Geophysical Research: Planets,2018-01-01,123(5)
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