Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] We study the condensation of CO 2 in Mars' atmosphere using temperature profiles retrieved from radio occultati...

Introduction: We have been investigating several independent data sets from recent Mars missions that provide evidence for a meters-thick, latitude-dependent surface layer [1, 2, 3]. Based on apparent physical properties observed in Mars Orbiter Camera (MOC) images and Mars Laser Altimeter (MOLA) data, and the distinct latitude dependence of these observations, we interpreted this to be an ice-...

Introduction: This study tests the proposition that data from the Mars Global Surveyor Thermal Emission Spectrometer (MGS TES) and Mars Orbiting Laser Altimeter (MOLA) can be used to identify stratigraphic and mineralogic layering in the wall and floor deposits of the Valles Marineris (VM). By using TES data at full resolution to identify unique local compositional signatures, our study complem...

Introduction: The rocks of Gusev Crater around the Spirit landing site are mainly olivine-bearing basalts [1-3], and are thought to have crystallized from lava with low viscosity [4]. These rocks are dark in color, vesicular, fine-grained, and have coatings of dust in varying degrees [5, 6]. However, the bedrock outcrops of the Columbia Hills are remarkably different from those near the landing...

The structural stability and durability of a sensing device at high-temperatures (HT) have important effects on its functionality reliability. This becomes more critical in the devices that work based surface acoustic waves (SAW). In this study, thermomechanical creep behaviors metallization systems, RuAl, MoLa, Mo suggested for electrodes HT-SAW sensors are investigated. Several experiments de...

Introduction: The observation of debris flows in high resolution MGS–MOC images suggests that liquid water was involved in their formation in the recent past [1]. The fact that many debris flows on Mars start from the top of isolated peaks [2, 3] and from the crest of dunes [4, 5, 6] favors an origin by melting of near–surface ice by solar heating. The minimum requirements for pure liquid water...

today, ecotourism is a major tourist activity around the world. it is based on environment potential through which suitable utilization and conservation of sites under management practices including considering accurate planning, potential, and peoples’ preferences are realized. the present study was conducted to determine people’s recreational preferences using questionnaires to evaluate the e...