Volatile interactions with the lunar surface

Regional Map of Molecular Water at High Southern Latitudes on the Moon Using 6 μm Data From the Stratospheric Observatory for Infrared Astronomy

“…There are three reservoirs that might host the detected water molecules: adsorbed on silicate surfaces, trapped or dissolved in silicate impact glass, or chemically bound to a mineral (Daly & Schultz, 2018;Dyar et al, 2010;Lucey et al, 2021). Water physically adsorbed on the surface of silicate grains is the surface state of water that 10.1029/2022GL097786 of 8 can potentially migrate the exosphere to the poles via hopping ballistically and randomly across the surface, known as ballistic migration (Watson et al, 1961).…”

Ozone production in electron irradiated CO2:O2 ices

“…Generally speaking, the surface of the Earth's moon is depleted in volatiles [67]. Nevertheless, ices are known to exist there especially within the permanently shadowed regions at the lunar poles.…”

“…Generally speaking, the surface of the Earth's moon is depleted in volatiles. 67 Nevertheless, ices are known to exist there This journal is © the Owner Societies 2022 especially within the permanently shadowed regions at the lunar poles. Data collected by the Chandra Altitudinal Composition Explorer (CHACE) instrument on the ISRO Moon Impact Probe has shown that oxygen-rich species are prevalent in the lunar exosphere, 68 while data from the NASA Lunar Crater Observation and Sensing Satellite (LCROSS) has revealed that the same is true for the surface ices.…”

Simulated Lunar Surface Hydration Measurements Using Multispectral Lidar at 3 µm

“…Hydration on the illuminated lunar surface has now been well established following remote observations of a 3 μm hydration band by five infrared spectrometers (Chauhan et al., 2021; Clark, 2009; Honniball et al., 2020; Pieters et al., 2009; Sunshine et al., 2009). The 2.8–3.5 μm IR hydration feature (hereafter referred to as the 3 μm band) however suffers from uncertainties in removing thermal emission from reflectance measurements made with passive spectrometers (Lucey et al., 2021). The primary complication with interpretation of passive 3 μm band measurements lies in decoupling the radiance contributions of solar reflectance and lunar thermal emission, which are roughly equal near 3 μm at lunar dayside temperatures (Clark, 1979; Vasavada et al., 2012).…”