Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes
Over 70 lakes have now been identified beneath the Antarctic ice sheet. Although water from none of the lakes has been sampled directly, analysis of lake ice frozen (accreted) to the underside of the ice sheet above Lake Vostok, the largest of these lakes, has allowed inferences to be made on lake w...
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ftkazanuniv:oai:dspace.kpfu.ru:net/94528 2023-05-15T13:46:53+02:00 Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes Siegert M. Ellis-Evans J. Tranter M. Mayer C. Petit J. Salamatin A. Priscu J. 2001 http://dspace.kpfu.ru/xmlui/handle/net/94528 unknown Nature 6864 603 414 http://dspace.kpfu.ru/xmlui/bitstream/net/94528/1/SCOPUS00280836-2001-414-6864-SID0035818966-a1.pdf 0028-0836 http://dspace.kpfu.ru/xmlui/handle/net/94528 SCOPUS00280836-2001-414-6864-SID0035818966 Review 2001 ftkazanuniv 2022-01-01T09:32:59Z Over 70 lakes have now been identified beneath the Antarctic ice sheet. Although water from none of the lakes has been sampled directly, analysis of lake ice frozen (accreted) to the underside of the ice sheet above Lake Vostok, the largest of these lakes, has allowed inferences to be made on lake water chemistry and has revealed small quantities of microbes. These findings suggest that Lake Vostok is an extreme, yet viable, environment for life. All subglacial lakes are subject to high pressure (∼350 atmospheres), low temperatures (about -3 °C) and permanent darkness. Any microbes present must therefore use chemical sources to power biological processes. Importantly, dissolved oxygen is available at least at the lake surface, from equilibration with air hydrates released from melting basal glacier ice. Microbes found in Lake Vostok's accreted ice are relatively modern, but the probability of ancient lake-floor sediments leads to a possibility of a very old biota at the base of subglacial lakes. Review Antarc* Antarctic Ice Sheet Kazan Federal University Digital Repository Antarctic The Antarctic Lake Vostok ENVELOPE(106.000,106.000,-77.500,-77.500) |
institution |
Open Polar |
collection |
Kazan Federal University Digital Repository |
op_collection_id |
ftkazanuniv |
language |
unknown |
description |
Over 70 lakes have now been identified beneath the Antarctic ice sheet. Although water from none of the lakes has been sampled directly, analysis of lake ice frozen (accreted) to the underside of the ice sheet above Lake Vostok, the largest of these lakes, has allowed inferences to be made on lake water chemistry and has revealed small quantities of microbes. These findings suggest that Lake Vostok is an extreme, yet viable, environment for life. All subglacial lakes are subject to high pressure (∼350 atmospheres), low temperatures (about -3 °C) and permanent darkness. Any microbes present must therefore use chemical sources to power biological processes. Importantly, dissolved oxygen is available at least at the lake surface, from equilibration with air hydrates released from melting basal glacier ice. Microbes found in Lake Vostok's accreted ice are relatively modern, but the probability of ancient lake-floor sediments leads to a possibility of a very old biota at the base of subglacial lakes. |
format |
Review |
author |
Siegert M. Ellis-Evans J. Tranter M. Mayer C. Petit J. Salamatin A. Priscu J. |
spellingShingle |
Siegert M. Ellis-Evans J. Tranter M. Mayer C. Petit J. Salamatin A. Priscu J. Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes |
author_facet |
Siegert M. Ellis-Evans J. Tranter M. Mayer C. Petit J. Salamatin A. Priscu J. |
author_sort |
Siegert M. |
title |
Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes |
title_short |
Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes |
title_full |
Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes |
title_fullStr |
Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes |
title_full_unstemmed |
Physical, chemical and biological processes in Lake Vostok and other Antarctic subglacial lakes |
title_sort |
physical, chemical and biological processes in lake vostok and other antarctic subglacial lakes |
publishDate |
2001 |
url |
http://dspace.kpfu.ru/xmlui/handle/net/94528 |
long_lat |
ENVELOPE(106.000,106.000,-77.500,-77.500) |
geographic |
Antarctic The Antarctic Lake Vostok |
geographic_facet |
Antarctic The Antarctic Lake Vostok |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
SCOPUS00280836-2001-414-6864-SID0035818966 |
op_relation |
Nature 6864 603 414 http://dspace.kpfu.ru/xmlui/bitstream/net/94528/1/SCOPUS00280836-2001-414-6864-SID0035818966-a1.pdf 0028-0836 http://dspace.kpfu.ru/xmlui/handle/net/94528 |
_version_ |
1766245504937623552 |