The Bioburden and Ionic Composition of Hypersaline Lake Ices: Novel Habitats on Earth and Their Astrobiological Implications

Buffo, Jacob; Brown, E K; Pontefract, A.; Schmidt, B. E.; Klempay, B; Lawrence, Justin; Bowman, Jeff S.; Grantham, Meg C.; Glass, Jennifer B.; Plattner, Taylor; Chivers, Chase; Doran, Peter T.

doi:10.1002/essoar.10506914.3

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Brine Volume Fraction As a Habitability Metric1

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2022

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“…Ice‐binding proteins, glycoproteins, and/or polysaccharides increase the tortuosity of the ice, which in turn retains salt and thus increases the brine volume fraction (Ewert & Deming, 2011; Krembs et al., 2011). Studies of natural saline ice that include both brine volume fraction and cell density profiles illustrate a correlation between these two quantities (Buffo et al., 2022; Uhlig et al., 2018), although further dedicated studies are needed.…”

Section: Brine Volume Fraction As a Habitability Metricmentioning

confidence: 99%

Brine Volume Fraction as a Habitability Metric for Europa's Ice Shell

Wolfenbarger

Fox-Powell

Buffo

et al. 2022

Geophysical Research Letters

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Jupiter's icy moon Europa is a high-priority target for exploration in the search for habitable worlds beyond Earth. Although the global sub-ice ocean represents Europa's most compelling potential habitat, habitable niches could extend from the ocean into the ice shell interior. Brine systems within Europa's ice shell have been hypothesized to represent potential habitats; however studies focused on their distribution and characteristics have been relatively limited (e.g.,

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