Sediment oxygen profiles in a super‐oxygenated antarctic lake
Perennially ice‐covered lakes are found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to temperate 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 O 2 at s...
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crwiley:10.4319/lo.1994.39.4.0839 2023-12-03T10:12:36+01:00 Sediment oxygen profiles in a super‐oxygenated antarctic lake Wharton, Robert A. Meyer, Michael A. McKay, Christopher P. Mancinelli, Rocco L. Simmons, George M. 1994 http://dx.doi.org/10.4319/lo.1994.39.4.0839 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1994.39.4.0839 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1994.39.4.0839 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 39, issue 4, page 839-853 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1994 crwiley https://doi.org/10.4319/lo.1994.39.4.0839 2023-11-09T14:37:21Z Perennially ice‐covered lakes are found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to temperate 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 O 2 at supersaturated levels in certain portions of the water column. Here we report the first sediment O 2 profiles obtained using a microelcctrode 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 O 2 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 photoperiod and benthic primary production in sediments overlain by a highly oxygenated water column. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys Victoria Land Wiley Online Library (via Crossref) Arctic Antarctic The Antarctic Victoria Land McMurdo Dry Valleys Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Lake Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Limnology and Oceanography 39 4 839 853 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Wharton, Robert A. Meyer, Michael A. McKay, Christopher P. Mancinelli, Rocco L. Simmons, George M. Sediment oxygen profiles in a super‐oxygenated antarctic lake |
topic_facet |
Aquatic Science Oceanography |
description |
Perennially ice‐covered lakes are found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to temperate 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 O 2 at supersaturated levels in certain portions of the water column. Here we report the first sediment O 2 profiles obtained using a microelcctrode 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 O 2 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 photoperiod and benthic primary production in sediments overlain by a highly oxygenated water column. |
format |
Article in Journal/Newspaper |
author |
Wharton, Robert A. Meyer, Michael A. McKay, Christopher P. Mancinelli, Rocco L. Simmons, George M. |
author_facet |
Wharton, Robert A. Meyer, Michael A. McKay, Christopher P. Mancinelli, Rocco L. Simmons, George M. |
author_sort |
Wharton, Robert A. |
title |
Sediment oxygen profiles in a super‐oxygenated antarctic lake |
title_short |
Sediment oxygen profiles in a super‐oxygenated antarctic lake |
title_full |
Sediment oxygen profiles in a super‐oxygenated antarctic lake |
title_fullStr |
Sediment oxygen profiles in a super‐oxygenated antarctic lake |
title_full_unstemmed |
Sediment oxygen profiles in a super‐oxygenated antarctic lake |
title_sort |
sediment oxygen profiles in a super‐oxygenated antarctic lake |
publisher |
Wiley |
publishDate |
1994 |
url |
http://dx.doi.org/10.4319/lo.1994.39.4.0839 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1994.39.4.0839 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1994.39.4.0839 |
long_lat |
ENVELOPE(163.000,163.000,-77.617,-77.617) ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(162.850,162.850,-77.633,-77.633) |
geographic |
Arctic Antarctic The Antarctic Victoria Land McMurdo Dry Valleys Taylor Valley Hoare Lake Hoare |
geographic_facet |
Arctic Antarctic The Antarctic Victoria Land McMurdo Dry Valleys Taylor Valley Hoare Lake Hoare |
genre |
Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Arctic McMurdo Dry Valleys Victoria Land |
op_source |
Limnology and Oceanography volume 39, issue 4, page 839-853 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1994.39.4.0839 |
container_title |
Limnology and Oceanography |
container_volume |
39 |
container_issue |
4 |
container_start_page |
839 |
op_container_end_page |
853 |
_version_ |
1784259184113483776 |