Salinity impact on water flow and lake ice in Lake Vostok, Antarctica
[1] Lake Vostok, isolated from direct exchange with the atmosphere for millions of years, provides a unique, so far inaccessible habitat. By using a numerical model, and recent geometry information, the lake circulation was investigated for different salinites. For freshwater, thermally driven circu...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.471.6804 2023-05-15T13:57:36+02:00 Salinity impact on water flow and lake ice in Lake Vostok, Antarctica C. Mayer K. Grosfeld M. J. Siegert The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.471.6804 http://epic.awi.de/13592/1/Gro2003q.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.471.6804 http://epic.awi.de/13592/1/Gro2003q.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://epic.awi.de/13592/1/Gro2003q.pdf text 2003 ftciteseerx 2016-01-08T07:19:34Z [1] Lake Vostok, isolated from direct exchange with the atmosphere for millions of years, provides a unique, so far inaccessible habitat. By using a numerical model, and recent geometry information, the lake circulation was investigated for different salinites. For freshwater, thermally driven circulation occurs, resulting from pressure-dependent melting point differences at the inclined ice ceiling. North to south ice pumping provides a steady supply of glacial water. The weak circulation is driven by very small density contrasts, but requires no unusual geothermal input. For low salinity conditions, however, circulation intensifies, occupying the entire lake. The maximum amplitudes of melting/freezing increase by about 50 % and melting extends further south. For both conditions approximately 200 m of refrozen ice accumulates beneath Vostok Station. The lake habitat will be affected clearly by salinity. It is essential to establish the specific chemistry for comprehending this unique environment and planning in situ experiments. INDEX Text Antarc* Antarctica Unknown Lake Vostok ENVELOPE(106.000,106.000,-77.500,-77.500) South Ice ENVELOPE(-29.867,-29.867,-81.950,-81.950) Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
[1] Lake Vostok, isolated from direct exchange with the atmosphere for millions of years, provides a unique, so far inaccessible habitat. By using a numerical model, and recent geometry information, the lake circulation was investigated for different salinites. For freshwater, thermally driven circulation occurs, resulting from pressure-dependent melting point differences at the inclined ice ceiling. North to south ice pumping provides a steady supply of glacial water. The weak circulation is driven by very small density contrasts, but requires no unusual geothermal input. For low salinity conditions, however, circulation intensifies, occupying the entire lake. The maximum amplitudes of melting/freezing increase by about 50 % and melting extends further south. For both conditions approximately 200 m of refrozen ice accumulates beneath Vostok Station. The lake habitat will be affected clearly by salinity. It is essential to establish the specific chemistry for comprehending this unique environment and planning in situ experiments. INDEX |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C. Mayer K. Grosfeld M. J. Siegert |
spellingShingle |
C. Mayer K. Grosfeld M. J. Siegert Salinity impact on water flow and lake ice in Lake Vostok, Antarctica |
author_facet |
C. Mayer K. Grosfeld M. J. Siegert |
author_sort |
C. Mayer |
title |
Salinity impact on water flow and lake ice in Lake Vostok, Antarctica |
title_short |
Salinity impact on water flow and lake ice in Lake Vostok, Antarctica |
title_full |
Salinity impact on water flow and lake ice in Lake Vostok, Antarctica |
title_fullStr |
Salinity impact on water flow and lake ice in Lake Vostok, Antarctica |
title_full_unstemmed |
Salinity impact on water flow and lake ice in Lake Vostok, Antarctica |
title_sort |
salinity impact on water flow and lake ice in lake vostok, antarctica |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.471.6804 http://epic.awi.de/13592/1/Gro2003q.pdf |
long_lat |
ENVELOPE(106.000,106.000,-77.500,-77.500) ENVELOPE(-29.867,-29.867,-81.950,-81.950) ENVELOPE(106.837,106.837,-78.464,-78.464) |
geographic |
Lake Vostok South Ice Vostok Station |
geographic_facet |
Lake Vostok South Ice Vostok Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://epic.awi.de/13592/1/Gro2003q.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.471.6804 http://epic.awi.de/13592/1/Gro2003q.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766265316188356608 |