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LAKE 2.0: A model for temperature, methane, carbon dioxide and oxygen dynamics in lakes
- Source :
- Stepanenko , V , Mammarella , I , Ojala , A K , Miettinen , H M , Lykosov , V N & Vesala , T V 2016 , ' LAKE 2.0: A model for temperature, methane, carbon dioxide and oxygen dynamics in lakes ' Geoscientific Model Development , vol 9 , no. 5 , pp. 1977-2006 . DOI: 10.5194/gmd-9-1977-2016
- Publication Year :
- 2016
-
Abstract
- A one-dimensional (1-D) model for an enclosed basin (lake) is presented, which reproduces temperature, horizontal velocities, oxygen, carbon dioxide and methane in the basin. All prognostic variables are treated in a unified manner via a generic 1-D transport equation for horizontally averaged property. A water body interacts with underlying sediments. These sediments are represented by a set of vertical columns with heat, moisture and CH4 transport inside. The model is validated vs. a comprehensive observational data set gathered at Kuivajarvi Lake (southern Finland), demonstrating a fair agreement. The value of a key calibration constant, regulating the magnitude of methane production in sediments, corresponded well to that obtained from another two lakes. We demonstrated via surface seiche parameterization that the near-bottom turbulence induced by surface seiches is likely to significantly affect CH4 accumulation there. Furthermore, our results suggest that a gas transfer through thermocline under intense internal seiche motions is a bottleneck in quantifying greenhouse gas dynamics in dimictic lakes, which calls for further research.
Details
- Database :
- OAIster
- Journal :
- Stepanenko , V , Mammarella , I , Ojala , A K , Miettinen , H M , Lykosov , V N & Vesala , T V 2016 , ' LAKE 2.0: A model for temperature, methane, carbon dioxide and oxygen dynamics in lakes ' Geoscientific Model Development , vol 9 , no. 5 , pp. 1977-2006 . DOI: 10.5194/gmd-9-1977-2016
- Notes :
- 30, English
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.ocn956348024
- Document Type :
- Electronic Resource