Thermophysical Characterization of Jezero Crater and NE Syrtis, Mars

Jezero crater, with a diameter of 45 km, hosts two inlet channels of deltaic remnants along with an outlet channel and embraces hydrated minerals [1-5]. NE Syrtis (located just south of Jezero crater) has an area of ~ 2500 km2 and a remarkable mineralogical diversity identified from orbital data as described in Salvatore et al. [6] and references therein. Thermophyscial characteristics are used to quantitatively measure the physical properties of Martian surface [7-11]. These characteristics can be studied through determining thermal inertia (TI), albedo, and diurnal temperature changes on the surface [12-13]. On Mars, thermal inertia is an indicator of surface geological characteristics [14-16]. Surface physical properties, spatial distribution, and transportation of fine materials can be understood from the measurement thermal inertia [17-18]. A lower TI represents unconsolidated loose, fine surface dust, and very few rocks, a medium/intermediate TI means combination of cemented surface, sand sized particles, and a fair number of scattered rocks, whereas a higher TI indicates rocky surface and bedrock outcrops [14-19]. Alternatively, a TI value of 350 Jm-2 K-1 s-1/2 and >1200 Jm-2 K-1 s-1/2 are representative of well-cemented sedimentary rock and crystalline igneous rocks, respectively [20-21]. The albedo is an important component of the total energy balance on Mars by controlling the maximum surface temperature [13,19]. Typically, dust-mantled terrains show high albedo (>0.26) while surfaces with larger grains or rocky materials show relatively low albedo [15-16,18]. This study aimed at determining thermophysical properties of Jezero crater and part of its watershed in NW Isidis and NE Syrtis between ~170 N to 19.50 N and ~760 E to 78.50 E. The objectives of the study are: (a) identifying the distribution of thermal inertia and albedo, and surface geology, and determining the relationship between (b) thermal inertia and albedo, and (c) elevation and thermophysical characteristics.

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Last Updated September 16, 2021, 15:26 (UTC)
Created September 16, 2021, 14:38 (UTC)