Abstract:
:Subglacial lakes are widespread beneath the Antarctic Ice Sheet but their control on ice-sheet dynamics and their ability to harbour life remain poorly characterized. Here we present evidence for a palaeo-subglacial lake on the Antarctic continental shelf. A distinct sediment facies recovered from a bedrock basin in Pine Island Bay indicates deposition within a low-energy lake environment. Diffusive-advection modelling demonstrates that low chloride concentrations in the pore water of the corresponding sediments can only be explained by initial deposition of this facies in a freshwater setting. These observations indicate that an active subglacial meltwater network, similar to that observed beneath the extant ice sheet, was also active during the last glacial period. It also provides a new framework for refining the exploration of these unique environments.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Kuhn G,Hillenbrand CD,Kasten S,Smith JA,Nitsche FO,Frederichs T,Wiers S,Ehrmann W,Klages JP,Mogollón JMdoi
10.1038/ncomms15591subject
Has Abstractpub_date
2017-06-01 00:00:00pages
15591issn
2041-1723pii
ncomms15591journal_volume
8pub_type
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