Journal
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
Volume 69, Issue 2, Pages 282-296Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/F2011-167
Keywords
-
Categories
Funding
- Mark Ridgeway
- Ontario Ministry of Natural Resources (OMNR) Harkness field station
- University of Toronto's Centre of Global Change Science
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Foundation for Innovation
- Ontario Ministry of Research and Innovation
Ask authors/readers for more resources
A major source of temperature variation in nearshore and benthic regions of stratified lakes is due to wind-driven tilting of the thermocline. The maximum displacement of the thermocline depends upon the wind forcing, stratification, and basin morphometry; combined these three-dimensional physical parameters give the dimensionless lake number (L-N). We find that the deflection of the thermocline across the length of the basin (Delta h*) is correlated to the temporally averaged L-N as Delta h*/2h(1) = 0.37L(N)(-1), where h(1) is the depth of the thermocline. We report field observations from Lake Opeongo (Ontario, Canada) showing that during large vertical movements of the thermocline, there are unstable temperature gradients in the benthic layer, as measured by the occurrence of temperature inversions on our thermistor strings. High-frequency waves interacting with the benthic boundary are most likely causing the temperature inversions. Measurements at two shallow slopes of S = 1% and 4%, show that inversions only occur when L-N < 5, whereas for S = 8%, the inversions occur only when L-N < 2.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available