0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake
Perennially ice-covered lakes arc found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to tcmperatc lakes that have diurnal photic periods, antarctic (and arctic) lakes have a yearly photic period. An unusual feature of the antarctic lakes is the occurrence of 0, at su...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.508.337 2023-05-15T13:31:18+02:00 0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake Robert A. Wharton Michael A. Meyer Christopher P. Mckay Rocco L. Mancinelli George M. Simmons The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.337 http://www.aslo.org/lo/toc/vol_39/issue_4/0839.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.337 http://www.aslo.org/lo/toc/vol_39/issue_4/0839.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_39/issue_4/0839.pdf text ftciteseerx 2016-01-08T09:29:07Z Perennially ice-covered lakes arc found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to tcmperatc lakes that have diurnal photic periods, antarctic (and arctic) lakes have a yearly photic period. An unusual feature of the antarctic lakes is the occurrence of 0, at super-saturated levels in certain portions of the water column. Here we report the first sediment 0, profiles obtained using a microelectrode from a perennially ice-covered antarctic lake. Sediment cores collected in January and October 1987 from Lake Hoare in Taylor Valley show oxygenation down to 15, and in some cases, 25 cm. The oxygenation of sediments several centimeters below the sediment-water interface is atypical for lake sediments and may be characteristic of perennially ice-covered lakes. There is a significant difference between the observed January and October sediment 0, profiles. Several explanations may account for the difference, including seasonality. A time-dependent model is presented which tests the feasibility of a seasonal cycle resulting from the long photopcriod and benthic primary production in sediments overlain by a highly oxygenated water column. The McMurdo Dry Valleys of southern Vic-toria Land, Antarctica (76”30’-78”3O’S, 160- Text Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys Victoria Land Unknown Antarctic Arctic Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Lake Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) The Antarctic Victoria Land |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Perennially ice-covered lakes arc found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to tcmperatc lakes that have diurnal photic periods, antarctic (and arctic) lakes have a yearly photic period. An unusual feature of the antarctic lakes is the occurrence of 0, at super-saturated levels in certain portions of the water column. Here we report the first sediment 0, profiles obtained using a microelectrode from a perennially ice-covered antarctic lake. Sediment cores collected in January and October 1987 from Lake Hoare in Taylor Valley show oxygenation down to 15, and in some cases, 25 cm. The oxygenation of sediments several centimeters below the sediment-water interface is atypical for lake sediments and may be characteristic of perennially ice-covered lakes. There is a significant difference between the observed January and October sediment 0, profiles. Several explanations may account for the difference, including seasonality. A time-dependent model is presented which tests the feasibility of a seasonal cycle resulting from the long photopcriod and benthic primary production in sediments overlain by a highly oxygenated water column. The McMurdo Dry Valleys of southern Vic-toria Land, Antarctica (76”30’-78”3O’S, 160- |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Robert A. Wharton Michael A. Meyer Christopher P. Mckay Rocco L. Mancinelli George M. Simmons |
spellingShingle |
Robert A. Wharton Michael A. Meyer Christopher P. Mckay Rocco L. Mancinelli George M. Simmons 0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake |
author_facet |
Robert A. Wharton Michael A. Meyer Christopher P. Mckay Rocco L. Mancinelli George M. Simmons |
author_sort |
Robert A. Wharton |
title |
0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake |
title_short |
0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake |
title_full |
0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake |
title_fullStr |
0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake |
title_full_unstemmed |
0 1994, by the American Society of Limnology and Oceanography, Inc. Sediment oxygen profiles in a super-oxygenated antarctic lake |
title_sort |
0 1994, by the american society of limnology and oceanography, inc. sediment oxygen profiles in a super-oxygenated antarctic lake |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.337 http://www.aslo.org/lo/toc/vol_39/issue_4/0839.pdf |
long_lat |
ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Antarctic Arctic Hoare Lake Hoare McMurdo Dry Valleys Taylor Valley The Antarctic Victoria Land |
geographic_facet |
Antarctic Arctic Hoare Lake Hoare McMurdo Dry Valleys Taylor Valley The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys Victoria Land |
op_source |
http://www.aslo.org/lo/toc/vol_39/issue_4/0839.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.337 http://www.aslo.org/lo/toc/vol_39/issue_4/0839.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766017280232128512 |