Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes
Abstract Although trends toward earlier ice‐out have been documented globally, the links between ice‐out timing and lake thermal and biogeochemical structure vary spatially. In high‐latitude lakes where ice‐out occurs close to peak intensity of solar radiation, these links remain unclear. Using a lo...
Published in: | Limnology and Oceanography Letters |
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Online Access: | http://dx.doi.org/10.1002/lol2.10386 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10386 |
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crwiley:10.1002/lol2.10386 2024-06-23T07:50:25+00:00 Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes Hazuková, Václava Burpee, Benjamin T. Northington, Robert M. Anderson, N. John Saros, Jasmine E. Directorate for Biological Sciences 2024 http://dx.doi.org/10.1002/lol2.10386 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10386 en eng Wiley http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography Letters volume 9, issue 3, page 258-267 ISSN 2378-2242 2378-2242 journal-article 2024 crwiley https://doi.org/10.1002/lol2.10386 2024-05-31T08:15:05Z Abstract Although trends toward earlier ice‐out have been documented globally, the links between ice‐out timing and lake thermal and biogeochemical structure vary spatially. In high‐latitude lakes where ice‐out occurs close to peak intensity of solar radiation, these links remain unclear. Using a long‐term dataset from 13 lakes in West Greenland, we investigated how changing ice‐out and weather conditions affect lake thermal structure and oxygen concentrations. In early ice‐out years, lakes reach higher temperatures across the water column and have deeper epilimnia. Summer hypolimnia are the warmest (~ 11°C) in years when cooler air temperatures follow early ice‐out, allowing full lake turnover. Due to the higher potential for substantive spring mixing in early ice‐out years, a warmer hypolimnion is associated with higher dissolved oxygen concentrations. By affecting variability in spring mixing, the consequences of shifts in ice phenology for lakes at high latitudes differ from expectations based on temperate regions. Article in Journal/Newspaper Arctic Greenland Wiley Online Library Arctic Greenland Limnology and Oceanography Letters |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Although trends toward earlier ice‐out have been documented globally, the links between ice‐out timing and lake thermal and biogeochemical structure vary spatially. In high‐latitude lakes where ice‐out occurs close to peak intensity of solar radiation, these links remain unclear. Using a long‐term dataset from 13 lakes in West Greenland, we investigated how changing ice‐out and weather conditions affect lake thermal structure and oxygen concentrations. In early ice‐out years, lakes reach higher temperatures across the water column and have deeper epilimnia. Summer hypolimnia are the warmest (~ 11°C) in years when cooler air temperatures follow early ice‐out, allowing full lake turnover. Due to the higher potential for substantive spring mixing in early ice‐out years, a warmer hypolimnion is associated with higher dissolved oxygen concentrations. By affecting variability in spring mixing, the consequences of shifts in ice phenology for lakes at high latitudes differ from expectations based on temperate regions. |
author2 |
Directorate for Biological Sciences |
format |
Article in Journal/Newspaper |
author |
Hazuková, Václava Burpee, Benjamin T. Northington, Robert M. Anderson, N. John Saros, Jasmine E. |
spellingShingle |
Hazuková, Václava Burpee, Benjamin T. Northington, Robert M. Anderson, N. John Saros, Jasmine E. Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes |
author_facet |
Hazuková, Václava Burpee, Benjamin T. Northington, Robert M. Anderson, N. John Saros, Jasmine E. |
author_sort |
Hazuková, Václava |
title |
Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes |
title_short |
Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes |
title_full |
Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes |
title_fullStr |
Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes |
title_full_unstemmed |
Earlier ice melt increases hypolimnetic oxygen despite regional warming in small Arctic lakes |
title_sort |
earlier ice melt increases hypolimnetic oxygen despite regional warming in small arctic lakes |
publisher |
Wiley |
publishDate |
2024 |
url |
http://dx.doi.org/10.1002/lol2.10386 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lol2.10386 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Limnology and Oceanography Letters volume 9, issue 3, page 258-267 ISSN 2378-2242 2378-2242 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lol2.10386 |
container_title |
Limnology and Oceanography Letters |
_version_ |
1802641312677101568 |