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Field Investigation of the Thermal Bar in Lake Ladoga, Spring 1991

Malm, Joakim LU ; Grahn, Lennart LU ; Mironov, Dmitry and Terzhevik, Arkady (1993) In Hydrology Research 24(5). p.339-358
Abstract
The thermal bar in Lake Ladoga was studied during one week in May 1991. Temperature and current velocity distributions were measured. The movement of the thermal bar and the horizontal heat transport were examined.

The temperature off-shore the thermal bar was found to be constant within a vertical. The velocity distributions were complex and dependent on wind conditions. Calculations of changes in heat content showed that there was a horizontal heat transport from the near-shore warm zone towards the thermal bar. The observed off-shore progression of the thermal bar was compared with analytically computed progression rates. The progression rate is underestimated if it is assumed that surface heating and vertical mixing are the... (More)
The thermal bar in Lake Ladoga was studied during one week in May 1991. Temperature and current velocity distributions were measured. The movement of the thermal bar and the horizontal heat transport were examined.

The temperature off-shore the thermal bar was found to be constant within a vertical. The velocity distributions were complex and dependent on wind conditions. Calculations of changes in heat content showed that there was a horizontal heat transport from the near-shore warm zone towards the thermal bar. The observed off-shore progression of the thermal bar was compared with analytically computed progression rates. The progression rate is underestimated if it is assumed that surface heating and vertical mixing are the only mechanisms contributing to the thermal bar progression. Better agreement is obtained if mixing of warm and cold water near the thermal bar zone is considered. (Less)
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Hydrology Research
volume
24
issue
5
pages
339 - 358
publisher
IWA Publishing
external identifiers
  • scopus:0027789512
ISSN
1998-9563
DOI
10.2166/nh.1993.12
language
English
LU publication?
yes
id
5d3cb3bc-92bf-45c0-8ae1-33e837d5f3dc
date added to LUP
2019-10-26 02:36:55
date last changed
2022-09-12 09:21:24
@article{5d3cb3bc-92bf-45c0-8ae1-33e837d5f3dc,
  abstract     = {{The thermal bar in Lake Ladoga was studied during one week in May 1991. Temperature and current velocity distributions were measured. The movement of the thermal bar and the horizontal heat transport were examined.<br/><br/>The temperature off-shore the thermal bar was found to be constant within a vertical. The velocity distributions were complex and dependent on wind conditions. Calculations of changes in heat content showed that there was a horizontal heat transport from the near-shore warm zone towards the thermal bar. The observed off-shore progression of the thermal bar was compared with analytically computed progression rates. The progression rate is underestimated if it is assumed that surface heating and vertical mixing are the only mechanisms contributing to the thermal bar progression. Better agreement is obtained if mixing of warm and cold water near the thermal bar zone is considered.}},
  author       = {{Malm, Joakim and Grahn, Lennart and Mironov, Dmitry and Terzhevik, Arkady}},
  issn         = {{1998-9563}},
  language     = {{eng}},
  number       = {{5}},
  pages        = {{339--358}},
  publisher    = {{IWA Publishing}},
  series       = {{Hydrology Research}},
  title        = {{Field Investigation of the Thermal Bar in Lake Ladoga, Spring 1991}},
  url          = {{http://dx.doi.org/10.2166/nh.1993.12}},
  doi          = {{10.2166/nh.1993.12}},
  volume       = {{24}},
  year         = {{1993}},
}