Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica)
Lake Untersee is the largest freshwater lake in the interior of East Antarctica. It is a perennially ice-covered, max. 169 m deep, ultra-oligotrophic lake. In contrast to earlier studies, we found clear evidence for physical and chemical stratification in the summer of 1991–92. However, the stratifi...
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1997
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Online Access: | http://dx.doi.org/10.1017/s0954102097000060 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000060 |
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crcambridgeupr:10.1017/s0954102097000060 2024-09-09T19:08:51+00:00 Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) Wand, U. Schwarz, G. Brüggemann, E. Bräuer, K. 1997 http://dx.doi.org/10.1017/s0954102097000060 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000060 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 9, issue 1, page 43-45 ISSN 0954-1020 1365-2079 journal-article 1997 crcambridgeupr https://doi.org/10.1017/s0954102097000060 2024-06-19T04:04:57Z Lake Untersee is the largest freshwater lake in the interior of East Antarctica. It is a perennially ice-covered, max. 169 m deep, ultra-oligotrophic lake. In contrast to earlier studies, we found clear evidence for physical and chemical stratification in the summer of 1991–92. However, the stratification was restricted to a trough, c. 500 m wide and up to 105 m deep, in the south-western part of the lake. There, the water body was distinctly stratified as indicated by sharp vertical gradients of temperature, pH, dissolved oxygen, and electrical conductivity. The water column was anoxic below 80 m. The chemical stratification is also indicated by changes of ionic ratios. Moreover, there was some evidence for methanogenesis and bacterial sulphate reduction in Lake Untersee. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Dronning Maud Land East Antarctica Cambridge University Press Dronning Maud Land East Antarctica Untersee ENVELOPE(13.467,13.467,-71.350,-71.350) Antarctic Science 9 1 43 45 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Lake Untersee is the largest freshwater lake in the interior of East Antarctica. It is a perennially ice-covered, max. 169 m deep, ultra-oligotrophic lake. In contrast to earlier studies, we found clear evidence for physical and chemical stratification in the summer of 1991–92. However, the stratification was restricted to a trough, c. 500 m wide and up to 105 m deep, in the south-western part of the lake. There, the water body was distinctly stratified as indicated by sharp vertical gradients of temperature, pH, dissolved oxygen, and electrical conductivity. The water column was anoxic below 80 m. The chemical stratification is also indicated by changes of ionic ratios. Moreover, there was some evidence for methanogenesis and bacterial sulphate reduction in Lake Untersee. |
format |
Article in Journal/Newspaper |
author |
Wand, U. Schwarz, G. Brüggemann, E. Bräuer, K. |
spellingShingle |
Wand, U. Schwarz, G. Brüggemann, E. Bräuer, K. Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) |
author_facet |
Wand, U. Schwarz, G. Brüggemann, E. Bräuer, K. |
author_sort |
Wand, U. |
title |
Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) |
title_short |
Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) |
title_full |
Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) |
title_fullStr |
Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) |
title_full_unstemmed |
Evidence for physical and chemical stratification in Lake Untersee (central Dronning Maud Land, East Antarctica) |
title_sort |
evidence for physical and chemical stratification in lake untersee (central dronning maud land, east antarctica) |
publisher |
Cambridge University Press (CUP) |
publishDate |
1997 |
url |
http://dx.doi.org/10.1017/s0954102097000060 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102097000060 |
long_lat |
ENVELOPE(13.467,13.467,-71.350,-71.350) |
geographic |
Dronning Maud Land East Antarctica Untersee |
geographic_facet |
Dronning Maud Land East Antarctica Untersee |
genre |
Antarc* Antarctic Science Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica Dronning Maud Land East Antarctica |
op_source |
Antarctic Science volume 9, issue 1, page 43-45 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102097000060 |
container_title |
Antarctic Science |
container_volume |
9 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
45 |
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1809823113918021632 |