Spring Circulation Associated with the Thermal Bar in Large Temperate Lakes
(1995) In Hydrology Research 26(4-5). p.331-358- Abstract
- The overall circulation pattern in spring is rather specific as density-induced currents may be of significance. The density-driven circulation perpendicular to the shore can be described as consisting of two circulation cells, with a zone of convergence, referred to as thermal bar, in between. The thermal bar, which coincides with the 4°C isotherm (the temperature of maximum density), inhibits horizontal water exchange, implying its practical importance. In this paper, a hydrodynamic numerical model is used to study the relative influence of wind- and density-driven currents in a large temperate lake during spring.
The study shows that the general density-driven circulation is strongly dependent on the bottom topography, with a... (More) - The overall circulation pattern in spring is rather specific as density-induced currents may be of significance. The density-driven circulation perpendicular to the shore can be described as consisting of two circulation cells, with a zone of convergence, referred to as thermal bar, in between. The thermal bar, which coincides with the 4°C isotherm (the temperature of maximum density), inhibits horizontal water exchange, implying its practical importance. In this paper, a hydrodynamic numerical model is used to study the relative influence of wind- and density-driven currents in a large temperate lake during spring.
The study shows that the general density-driven circulation is strongly dependent on the bottom topography, with a more pronounced circulation and considerable descending motions in the thermal bar zone in lakes with steep sloping bottoms. In shallow lakes, the wind-driven circulation dominates, and the effect of density-induced currents is marginal, except at locations with a drastic change in bottom depth. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/b7c6f0b0-9954-43ad-a3fd-6bafba45bdf0
- author
- Malm, Joakim LU
- organization
- publishing date
- 1995
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Hydrology Research
- volume
- 26
- issue
- 4-5
- pages
- 331 - 358
- publisher
- IWA Publishing
- external identifiers
-
- scopus:0029412726
- ISSN
- 1998-9563
- DOI
- 10.2166/nh.1995.0019
- language
- English
- LU publication?
- yes
- id
- b7c6f0b0-9954-43ad-a3fd-6bafba45bdf0
- date added to LUP
- 2019-10-26 00:52:46
- date last changed
- 2022-09-12 09:21:10
@article{b7c6f0b0-9954-43ad-a3fd-6bafba45bdf0,
abstract = {{The overall circulation pattern in spring is rather specific as density-induced currents may be of significance. The density-driven circulation perpendicular to the shore can be described as consisting of two circulation cells, with a zone of convergence, referred to as thermal bar, in between. The thermal bar, which coincides with the 4°C isotherm (the temperature of maximum density), inhibits horizontal water exchange, implying its practical importance. In this paper, a hydrodynamic numerical model is used to study the relative influence of wind- and density-driven currents in a large temperate lake during spring.<br/><br/>The study shows that the general density-driven circulation is strongly dependent on the bottom topography, with a more pronounced circulation and considerable descending motions in the thermal bar zone in lakes with steep sloping bottoms. In shallow lakes, the wind-driven circulation dominates, and the effect of density-induced currents is marginal, except at locations with a drastic change in bottom depth.}},
author = {{Malm, Joakim}},
issn = {{1998-9563}},
language = {{eng}},
number = {{4-5}},
pages = {{331--358}},
publisher = {{IWA Publishing}},
series = {{Hydrology Research}},
title = {{Spring Circulation Associated with the Thermal Bar in Large Temperate Lakes}},
url = {{http://dx.doi.org/10.2166/nh.1995.0019}},
doi = {{10.2166/nh.1995.0019}},
volume = {{26}},
year = {{1995}},
}