Lake Thermal Dynamics in Early Winter
Development of Temperature and Oxygen Gradients during the Formation of Ice Cover in a Deep, Boreal Lake
(Sprache: Englisch)
Due to difficult access to lakes at the time of freezing, their hydrodynamic regime is poorly known. In this study, we investigated the dynamics of temperature during the formation of ice cover in 78 m deep Lake Pääjärvi in southern Finland. First, after...
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Due to difficult access to lakes at the time of freezing, their hydrodynamic regime is poorly known. In this study, we investigated the dynamics of temperature during the formation of ice cover in 78 m deep Lake Pääjärvi in southern Finland. First, after fall overturn, we were interested in how the water is re-establishing its gradients. Secondly, how the forming of ice plays a role in determining this mixing regime. At the deepest point of the lake vertical distribution of temperature remained uniform until 3 oC, after which temperature was inversely distributed and at times also stratified. As the water area mixed by wind reduced, we observed an increase in temperature and a decrease in oxygen below the depth of 50 m before the whole lake was ice covered. Sediment heat increased the overlaying water density initiating a flow along the rather steep sediment slopes. Our results help to understand large scale and dynamic translocations of water masses in early winter.
Autoren-Porträt von Heather Mariash
Mariash, HeatherUpon completing her Bachelor of Science at the University of Alberta, Canada, Heather Mariash received her masters in Finland at the University of Jyväskylä, where she continues with aquatic research.
Bibliographische Angaben
- Autor: Heather Mariash
- 52 Seiten, Maße: 22 cm, Kartoniert (TB), Englisch
- Verlag: VDM Verlag Dr. Müller e.K.
- ISBN-10: 3639059913
- ISBN-13: 9783639059915
Sprache:
Englisch
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