Effects of similar weather patterns on the thermal stratification, mixing regimes and hypolimnetic oxygen depletion in two boreal lakes with different water transparency

Ivan Mammarella, Galina Gavrylenko, Galina Zdorovennova, Anne Ojala, Kukka-Maaria Erkkilä, Roman Zdorovennov, Oleg Stepanyuk, Nikolay Palshin, Arkady Terzhevik, Timo Vesala, Jouni Heiskanen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Mechanistic understanding of the impacts of changing climate on the thermal stratification and mixing dynamics of oxygen in lake ecosystems is hindered by limited evidence on how functioning of individual lakes is affected by interannual variability in meteorological conditions. We studied two boreal lakes (Kuivajärvi and Vendyurskoe) with different water clarity during three years representing a gradient of meteorological forcing. The lakes are located in the same climatic region and have a similar depth, but, because of the difference in water transparency, they responded differently to the weather fronts. Long spring overturn and relatively cold summer resulted in weak stratification and well-oxygenated water column in both lakes. However, in dark-water Kuivajärvi, the hypolimnion was unusually warm leading to high production rate of CO2. Warm summer had the most dramatic impact on clear-water lake Vendyurskoe changing its mixing regime from typical polymixis to dimixis, leading to strong oxygen depletion and ensuing anoxia. In dimictic dark-water Kuivajärvi, hot spring resulted in early onset of stratification with ensuing low hypolimnetic temperatures and persistent oxygen depletion. These results indicate that climate warming will increase the risk of occurrence of deep water anoxia.
Original languageEnglish
JournalBoreal Environment Research
Volume23
Pages (from-to)237-247
Number of pages11
ISSN1239-6095
Publication statusPublished - Aug 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 1172 Environmental sciences

Cite this

@article{d523cde4dcfb4ee8ae55e6cddeabd0cf,
title = "Effects of similar weather patterns on the thermal stratification, mixing regimes and hypolimnetic oxygen depletion in two boreal lakes with different water transparency",
abstract = "Mechanistic understanding of the impacts of changing climate on the thermal stratification and mixing dynamics of oxygen in lake ecosystems is hindered by limited evidence on how functioning of individual lakes is affected by interannual variability in meteorological conditions. We studied two boreal lakes (Kuivaj{\"a}rvi and Vendyurskoe) with different water clarity during three years representing a gradient of meteorological forcing. The lakes are located in the same climatic region and have a similar depth, but, because of the difference in water transparency, they responded differently to the weather fronts. Long spring overturn and relatively cold summer resulted in weak stratification and well-oxygenated water column in both lakes. However, in dark-water Kuivaj{\"a}rvi, the hypolimnion was unusually warm leading to high production rate of CO2. Warm summer had the most dramatic impact on clear-water lake Vendyurskoe changing its mixing regime from typical polymixis to dimixis, leading to strong oxygen depletion and ensuing anoxia. In dimictic dark-water Kuivaj{\"a}rvi, hot spring resulted in early onset of stratification with ensuing low hypolimnetic temperatures and persistent oxygen depletion. These results indicate that climate warming will increase the risk of occurrence of deep water anoxia.",
keywords = "1172 Environmental sciences",
author = "Ivan Mammarella and Galina Gavrylenko and Galina Zdorovennova and Anne Ojala and Kukka-Maaria Erkkil{\"a} and Roman Zdorovennov and Oleg Stepanyuk and Nikolay Palshin and Arkady Terzhevik and Timo Vesala and Jouni Heiskanen",
year = "2018",
month = "8",
language = "English",
volume = "23",
pages = "237--247",
journal = "Boreal Environment Research",
issn = "1239-6095",
publisher = "Finnish Environment Institute",

}

Effects of similar weather patterns on the thermal stratification, mixing regimes and hypolimnetic oxygen depletion in two boreal lakes with different water transparency. / Mammarella, Ivan; Gavrylenko, Galina; Zdorovennova, Galina; Ojala, Anne; Erkkilä, Kukka-Maaria; Zdorovennov, Roman; Stepanyuk, Oleg; Palshin, Nikolay; Terzhevik, Arkady; Vesala, Timo; Heiskanen, Jouni.

In: Boreal Environment Research, Vol. 23, 08.2018, p. 237-247.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effects of similar weather patterns on the thermal stratification, mixing regimes and hypolimnetic oxygen depletion in two boreal lakes with different water transparency

AU - Mammarella, Ivan

AU - Gavrylenko, Galina

AU - Zdorovennova, Galina

AU - Ojala, Anne

AU - Erkkilä, Kukka-Maaria

AU - Zdorovennov, Roman

AU - Stepanyuk, Oleg

AU - Palshin, Nikolay

AU - Terzhevik, Arkady

AU - Vesala, Timo

AU - Heiskanen, Jouni

PY - 2018/8

Y1 - 2018/8

N2 - Mechanistic understanding of the impacts of changing climate on the thermal stratification and mixing dynamics of oxygen in lake ecosystems is hindered by limited evidence on how functioning of individual lakes is affected by interannual variability in meteorological conditions. We studied two boreal lakes (Kuivajärvi and Vendyurskoe) with different water clarity during three years representing a gradient of meteorological forcing. The lakes are located in the same climatic region and have a similar depth, but, because of the difference in water transparency, they responded differently to the weather fronts. Long spring overturn and relatively cold summer resulted in weak stratification and well-oxygenated water column in both lakes. However, in dark-water Kuivajärvi, the hypolimnion was unusually warm leading to high production rate of CO2. Warm summer had the most dramatic impact on clear-water lake Vendyurskoe changing its mixing regime from typical polymixis to dimixis, leading to strong oxygen depletion and ensuing anoxia. In dimictic dark-water Kuivajärvi, hot spring resulted in early onset of stratification with ensuing low hypolimnetic temperatures and persistent oxygen depletion. These results indicate that climate warming will increase the risk of occurrence of deep water anoxia.

AB - Mechanistic understanding of the impacts of changing climate on the thermal stratification and mixing dynamics of oxygen in lake ecosystems is hindered by limited evidence on how functioning of individual lakes is affected by interannual variability in meteorological conditions. We studied two boreal lakes (Kuivajärvi and Vendyurskoe) with different water clarity during three years representing a gradient of meteorological forcing. The lakes are located in the same climatic region and have a similar depth, but, because of the difference in water transparency, they responded differently to the weather fronts. Long spring overturn and relatively cold summer resulted in weak stratification and well-oxygenated water column in both lakes. However, in dark-water Kuivajärvi, the hypolimnion was unusually warm leading to high production rate of CO2. Warm summer had the most dramatic impact on clear-water lake Vendyurskoe changing its mixing regime from typical polymixis to dimixis, leading to strong oxygen depletion and ensuing anoxia. In dimictic dark-water Kuivajärvi, hot spring resulted in early onset of stratification with ensuing low hypolimnetic temperatures and persistent oxygen depletion. These results indicate that climate warming will increase the risk of occurrence of deep water anoxia.

KW - 1172 Environmental sciences

M3 - Article

VL - 23

SP - 237

EP - 247

JO - Boreal Environment Research

JF - Boreal Environment Research

SN - 1239-6095

ER -