Constraining the Potential Liquid Water Environment at Gale Crater, Mars
Constraining the Potential Liquid Water Environment at Gale Crater, Mars
复制标题
限制火星盖尔陨石坑潜在的液态水环境
DOI：
--
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
M. Tolbert
中科院分区：
文献类型：
--
作者：
Edgard G. Rivera;R. Gough;V. Chevrier;K. Primm;G. Martínez;M. Tolbert
火星科学实验室（MSL）的火星车环境监测站（REMS）已经在火星盖尔陨石坑连续进行了几个火星年的原位气象测量。在寻找液体形成的过程中，重要的是REMS对地面温度的测量和对空气中温度和相对湿度的测量，这是关于冰的。这些数据可以约束盐水的表面和地下稳定性。在这里，我们使用REMS数据的最新校准和一致的相对湿度比较（即，相对于液体与相对于冰）来研究MSL穿越过程中地表和地下液体的潜在形成。我们专门研究了高氯酸钙潮解的潜力。我们的数据分析表明，在最初的1648个溶胶中，地表盐水的形成并不有利，因为只有两次（溶胶1232和1311）湿度-温度条件在与液相一致的误差范围内。另一方面，地下环境的建模将支持浅层地下的盐水生产。事实上，我们发现低热惯性（Γ > 300 J m−2 K−1 s−1/2）的地表浅层可能偶尔有利于通过潮解形成盐水。Γ > 175 J m−2 K−1 s−1/2和反照率> 0.25的地形最容易形成地下卤水。如果形成盐水，它们会在l100°左右形成。它们的预测属性不符合特殊或不确定区域的要求，因此它们不可能是我们所知道的生命的潜在宜居环境。
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≲175 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.
MSL 漫游者环境监测站盖尔陨石坑地面温度传感器测量的前 100 个溶液的观测结果和初步科学结果
DOI：
10.1002/2013je004520
发表时间：
--
期刊：
Journal of Geophysical Research: Planets
影响因子：
--
作者：
Hamilton [including W. Goetz]
通讯作者：
Hamilton [including W. Goetz]
影响因子：
18.3
作者：
Martin-Torres, F. Javier;Zorzano, Maria-Paz;Vaniman, David
通讯作者：
Vaniman, David