O'Brien, W. J. University of Kansas, wjob@falcon.cc.ukans.edu
Barfield, M. J. University of Kansas, barfield@ukans.edu

 
MODELING THE EFFECTS OF CULTURAL EUTROPHICATION AND CLIMATE CHANGE ON OXYGEN DEPLETION IN ARCTIC LAKES
 
Arctic lakes are vulnerable to oxygen depletion due to the long winter ice cover and incomplete oxygenation during the brief spring mixing. Cultural eutrophication will exacerbate the oxygen depletion, and global warming may raise summer water temperatures. These factors together may cause some lakes to become unsuitable for cold-water fishes, such as lake trout, which require cool oxygenated water. A computer eddy-diffusion model predicting temperature and oxygen profiles was developed and calibrated with data from the Arctic Long Term Ecological Research project, which included lake fertilization experiments. The model was then used to predict the effect of various degrees of cultural eutrophication and climate change on arctic lakes of different depths on the suitability for lake trout. Both increased temperature and nutrient addition decreased the volume of suitable habitat for lake trout. This was especially important for lakes shallower than 25 m deep which includes most arctic lakes.
 
Day: Wednesday, Feb. 3
Time: 08:30 - 08:45am
Location: Sweeney Center
 
Code: CS59WE0830S