dc.contributor.author | Sharifi, Fatemeh Sadat | |
dc.contributor.author | Hinkelmann, Reinhard | |
dc.contributor.author | Hattermann, Tore | |
dc.contributor.author | Kirillin, Georgiy | |
dc.date.accessioned | 2025-03-12T14:14:34Z | |
dc.date.available | 2025-03-12T14:14:34Z | |
dc.date.issued | 2025-03-03 | |
dc.description.abstract | When a solid inclined surface is submerged in a quiescent stratified fluid, the combined effects of buoyancy forces and diffusion generate an upward gravity flow along the slope. Thermally stratified ice-covered lakes remain in a nearly quiescent state and are potentially prone to this effect. We use three-dimensional hydrodynamic modeling to investigate the diffusion-gravity flow and its impact on lake-wide circulation in idealized ice-covered lakes. The qualitative characteristics of the boundary flow were adequately simulated by the model, supported by a good agreement with theoretical predictions. In enclosed lakes, the modeled diffusion-driven boundary flow generates residual circulation, which overturns the entire lake water column within 1 to 6 months, suggesting a significant contribution of this mechanism to heat and mass transport in lakes with long ice-covered seasons. When the insulation boundary condition is lifted and additional buoyancy is produced by heat flux from lake sediment, a counterflow emerges, resulting in a circulation pattern characterized by the superposition of two opposing boundary flows. At flux magnitudes exceeding one watt per square meter, the counterflow can entirely replace the diffusion-driven circulation. Due to the small magnitudes of these flows, the Coriolis effect substantially influences circulation, partially transforming radial flow into rotational lake-wide "gyres." The number and rotational direction of these gyres depend on the relative contribution of bottom heat flux. The results provide a framework for designing field studies in real lakes and investigating circulation effects on the transport of dissolved matter, such as nutrients, oxygen and greenhouse gases in ice-covered lakes. | en_US |
dc.identifier.citation | Sharifi, Hinkelmann, Hattermann T, Kirillin. Three-dimensional modeling of diffusion-gravity flows in ice-covered lakes. Environmental Fluid Mechanics. 2025;25(16) | en_US |
dc.identifier.cristinID | FRIDAID 2365470 | |
dc.identifier.doi | 10.1007/s10652-025-10026-4 | |
dc.identifier.issn | 1567-7419 | |
dc.identifier.issn | 1573-1510 | |
dc.identifier.uri | https://hdl.handle.net/10037/36675 | |
dc.language.iso | eng | en_US |
dc.publisher | Springer Nature | en_US |
dc.relation.journal | Environmental Fluid Mechanics | |
dc.relation.projectID | Norges forskningsråd: 332635 | en_US |
dc.rights.accessRights | openAccess | en_US |
dc.rights.holder | Copyright 2025 The Author(s) | en_US |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0 | en_US |
dc.rights | Attribution 4.0 International (CC BY 4.0) | en_US |
dc.title | Three-dimensional modeling of diffusion-gravity flows in ice-covered lakes | en_US |
dc.type.version | publishedVersion | en_US |
dc.type | Journal article | en_US |
dc.type | Tidsskriftartikkel | en_US |
dc.type | Peer reviewed | en_US |