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Hypersaline “wet patches” in Taylor Valley, Antarctica Public Deposited

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  • Spatially isolated patches of soil located in Taylor Valley, McMurdo Dry Valleys, Antarctica, are sites of elevated salt content and soil moisture. During Antarctic spring, in the absence of snow melt, visibly wet (reduced albedo) patches of soil are present at the surface. The soil pore fluids are hypersaline and have average water activity of 0.74 (the water activity of a solution determines the equilibrium vapor pressure of that solution), and are an order of magnitude more saline than average soils in the Dry Valleys. These salty soils are 3–5 times more water rich than average soils. Geochemical and meteorological analyses show that these wet patches are sites of direct vapor emplacement into soil pore fluids that may ultimately be sourced by the deliquescence of soil salts. These wet patches represent a non-precipitation, non-groundwater source for water into Antarctic permafrost.
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  • Levy, J. S., A. G. Fountain, K. A. Welch, and W. B. Lyons (2012), Hypersaline “wet patches” in Taylor Valley, Antarctica, Geophysical Research Letters, 39, L05402, doi:10.1029/2012GL050898.
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  • 39
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  • L05402
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  • This work is supported by the Antarctic Organisms and Ecosystems Program in the Antarctic Sciences Division of the National Science Foundation (award ANT-0851965 to JSL) and by the MCM-LTER (award ANT-1115245) for analytical support.
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  • description.provenance : Made available in DSpace on 2012-07-03T18:58:33Z (GMT). No. of bitstreams: 1 LevyJosephCEOASHypersalineWetPatches.pdf: 196601 bytes, checksum: 7827c06c747d1aabfb8ef8a8350b2a8a (MD5) Previous issue date: 2012-03-06
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-07-03T18:58:33Z No. of bitstreams: 1 LevyJosephCEOASHypersalineWetPatches.pdf: 196601 bytes, checksum: 7827c06c747d1aabfb8ef8a8350b2a8a (MD5)

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