Dates of Feeze-up and Break-up
ES classes have been using the break-up data collected by Norman Barchello with his observations on Cowley Lake. Norm has been recording the break up dates on Cowley lake since 1995. ES classes have also been recording ice thickness twice yearly at generally the same location on Cowley lake since 2005. The ice thickness appears to have more to do with snow cover, length of time and depth of snow than it does on the mean daily temperatures. There was no consistent trend during this period indicating that much longer periods of time are required and many more sites for observation if trends are to be documented.
ES classes have been using the break-up data collected by Norman Barchello with his observations on Cowley Lake. Norm has been recording the break up dates on Cowley lake since 1995. ES classes have also been recording ice thickness twice yearly at generally the same location on Cowley lake since 2005. The ice thickness appears to have more to do with snow cover, length of time and depth of snow than it does on the mean daily temperatures. There was no consistent trend during this period indicating that much longer periods of time are required and many more sites for observation if trends are to be documented.