Complex effects of winter warming on the physicochemical characteristics of a deep lake
Recent winter warming over Central Europe associated with a positive phase of the North Atlantic Oscillation (NAO) strongly influenced the thermal and water column stability properties of deep Lake Constance (z mean = 101 m). Volumetrically weighted average water temperatures have increased since th...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.4319/lo.2003.48.4.1432 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2003.48.4.1432 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2003.48.4.1432 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2003.48.4.1432 |
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crwiley:10.4319/lo.2003.48.4.1432 2024-09-09T19:57:32+00:00 Complex effects of winter warming on the physicochemical characteristics of a deep lake Straile, Dietmar Jöhnk, Klaus Henno, Rossknecht 2003 http://dx.doi.org/10.4319/lo.2003.48.4.1432 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2003.48.4.1432 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2003.48.4.1432 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2003.48.4.1432 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 48, issue 4, page 1432-1438 ISSN 0024-3590 1939-5590 journal-article 2003 crwiley https://doi.org/10.4319/lo.2003.48.4.1432 2024-08-09T04:22:24Z Recent winter warming over Central Europe associated with a positive phase of the North Atlantic Oscillation (NAO) strongly influenced the thermal and water column stability properties of deep Lake Constance (z mean = 101 m). Volumetrically weighted average water temperatures have increased since the 1960s by an average of 0.017°C yr −1 , and its interannual variability was strongly related to the variability in winter air temperature and the NAO winter index (NAO W ). The influence of NAO W on water temperature was more persistent than its influence on air temperature. The seasonal persistence of the NAO W signal increased with water depth. Deep‐water temperatures were related to the NAOW from one spring mixing period to the next. This caused a time lag of 1 yr in the response of deep‐water winter temperatures to the NAO W . Reduced winter cooling during high‐NAO W years resulted in the persistence of small temperature gradients that possibly resisted complete mixing. This, in turn, resulted in less upward mixing of nutrients (total phosphorus and total silica), which accumulated in the hypolimnion during the previous stratification period. A second effect of incomplete mixing was the lack of the replenishment of deepwater oxygen during high‐NAO W years. Hence, besides its strong impact on the thermal regime, climate variability influenced both the causes (nutrient supply for phytoplankton growth) and symptoms (the degree of hypolimnetic oxygen deficiency) of trophic changes in Lake Constance. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Wiley Online Library Limnology and Oceanography 48 4 1432 1438 |
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Wiley Online Library |
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English |
description |
Recent winter warming over Central Europe associated with a positive phase of the North Atlantic Oscillation (NAO) strongly influenced the thermal and water column stability properties of deep Lake Constance (z mean = 101 m). Volumetrically weighted average water temperatures have increased since the 1960s by an average of 0.017°C yr −1 , and its interannual variability was strongly related to the variability in winter air temperature and the NAO winter index (NAO W ). The influence of NAO W on water temperature was more persistent than its influence on air temperature. The seasonal persistence of the NAO W signal increased with water depth. Deep‐water temperatures were related to the NAOW from one spring mixing period to the next. This caused a time lag of 1 yr in the response of deep‐water winter temperatures to the NAO W . Reduced winter cooling during high‐NAO W years resulted in the persistence of small temperature gradients that possibly resisted complete mixing. This, in turn, resulted in less upward mixing of nutrients (total phosphorus and total silica), which accumulated in the hypolimnion during the previous stratification period. A second effect of incomplete mixing was the lack of the replenishment of deepwater oxygen during high‐NAO W years. Hence, besides its strong impact on the thermal regime, climate variability influenced both the causes (nutrient supply for phytoplankton growth) and symptoms (the degree of hypolimnetic oxygen deficiency) of trophic changes in Lake Constance. |
format |
Article in Journal/Newspaper |
author |
Straile, Dietmar Jöhnk, Klaus Henno, Rossknecht |
spellingShingle |
Straile, Dietmar Jöhnk, Klaus Henno, Rossknecht Complex effects of winter warming on the physicochemical characteristics of a deep lake |
author_facet |
Straile, Dietmar Jöhnk, Klaus Henno, Rossknecht |
author_sort |
Straile, Dietmar |
title |
Complex effects of winter warming on the physicochemical characteristics of a deep lake |
title_short |
Complex effects of winter warming on the physicochemical characteristics of a deep lake |
title_full |
Complex effects of winter warming on the physicochemical characteristics of a deep lake |
title_fullStr |
Complex effects of winter warming on the physicochemical characteristics of a deep lake |
title_full_unstemmed |
Complex effects of winter warming on the physicochemical characteristics of a deep lake |
title_sort |
complex effects of winter warming on the physicochemical characteristics of a deep lake |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.4319/lo.2003.48.4.1432 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2003.48.4.1432 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2003.48.4.1432 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2003.48.4.1432 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Limnology and Oceanography volume 48, issue 4, page 1432-1438 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2003.48.4.1432 |
container_title |
Limnology and Oceanography |
container_volume |
48 |
container_issue |
4 |
container_start_page |
1432 |
op_container_end_page |
1438 |
_version_ |
1809928452703256576 |