Effect of salt exclusion from lake ice on seasonal circulation
We describe the circulation of Tailings Lake, located 220 km north of Yellowknife, Northwest Territories, Canada. From Jul 2004 to Sep 2007, temperature and conductivity profiles were collected together with data from three moored temperature chains and a meteorological station. The salt content of...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.569.8625 2023-05-15T17:46:42+02:00 Effect of salt exclusion from lake ice on seasonal circulation Roger Pieters Gregory A. Lawrence The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.569.8625 http://www.aslo.org/lo/toc/vol_54/issue_2/0401.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.569.8625 http://www.aslo.org/lo/toc/vol_54/issue_2/0401.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_54/issue_2/0401.pdf text 2009 ftciteseerx 2016-01-08T12:26:16Z We describe the circulation of Tailings Lake, located 220 km north of Yellowknife, Northwest Territories, Canada. From Jul 2004 to Sep 2007, temperature and conductivity profiles were collected together with data from three moored temperature chains and a meteorological station. The salt content of the lake was elevated (salinity 1 g L21) relative to surrounding natural waters (,0.1 g L21). Winter ice cover included 60–80 cm of transparent ‘‘black’ ’ ice, which excluded up to 99 % of the salt from the water as the ice formed. During winter, the salt excluded from the ice was mixed throughout the water column under the ice. In spring, ice melt and snow runoff resulted in a freshwater cap; the density contrast between this fresh epilimnion and the more saline hypolimnion was sufficient to inhibit spring turnover. In summer, the epilimnion was deepened by storms, mixing anoxic water from the hypolimnion into the surface layer. Because spring turnover was suppressed, oxygen replenishment of the hypolimnion occurred only in fall. Although Tailings Lake has been subject to numerous anthropogenic changes, similar effects can be expected in other natural and manmade water bodies with elevated salinity and significant ice cover. Brine rejection from sea ice and its importance to ocean circulation has long been appreciated (Carmack 1990). Salt Text Northwest Territories Sea ice Yellowknife Unknown Canada Northwest Territories Yellowknife |
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English |
description |
We describe the circulation of Tailings Lake, located 220 km north of Yellowknife, Northwest Territories, Canada. From Jul 2004 to Sep 2007, temperature and conductivity profiles were collected together with data from three moored temperature chains and a meteorological station. The salt content of the lake was elevated (salinity 1 g L21) relative to surrounding natural waters (,0.1 g L21). Winter ice cover included 60–80 cm of transparent ‘‘black’ ’ ice, which excluded up to 99 % of the salt from the water as the ice formed. During winter, the salt excluded from the ice was mixed throughout the water column under the ice. In spring, ice melt and snow runoff resulted in a freshwater cap; the density contrast between this fresh epilimnion and the more saline hypolimnion was sufficient to inhibit spring turnover. In summer, the epilimnion was deepened by storms, mixing anoxic water from the hypolimnion into the surface layer. Because spring turnover was suppressed, oxygen replenishment of the hypolimnion occurred only in fall. Although Tailings Lake has been subject to numerous anthropogenic changes, similar effects can be expected in other natural and manmade water bodies with elevated salinity and significant ice cover. Brine rejection from sea ice and its importance to ocean circulation has long been appreciated (Carmack 1990). Salt |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Roger Pieters Gregory A. Lawrence |
spellingShingle |
Roger Pieters Gregory A. Lawrence Effect of salt exclusion from lake ice on seasonal circulation |
author_facet |
Roger Pieters Gregory A. Lawrence |
author_sort |
Roger Pieters |
title |
Effect of salt exclusion from lake ice on seasonal circulation |
title_short |
Effect of salt exclusion from lake ice on seasonal circulation |
title_full |
Effect of salt exclusion from lake ice on seasonal circulation |
title_fullStr |
Effect of salt exclusion from lake ice on seasonal circulation |
title_full_unstemmed |
Effect of salt exclusion from lake ice on seasonal circulation |
title_sort |
effect of salt exclusion from lake ice on seasonal circulation |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.569.8625 http://www.aslo.org/lo/toc/vol_54/issue_2/0401.pdf |
geographic |
Canada Northwest Territories Yellowknife |
geographic_facet |
Canada Northwest Territories Yellowknife |
genre |
Northwest Territories Sea ice Yellowknife |
genre_facet |
Northwest Territories Sea ice Yellowknife |
op_source |
http://www.aslo.org/lo/toc/vol_54/issue_2/0401.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.569.8625 http://www.aslo.org/lo/toc/vol_54/issue_2/0401.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766150501828657152 |