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SWIP - Deployment 1


Ice thickness measurements

Ice first appeared on October 15, 2008. This was short-lived and broken up by storm activity. Ice cover did not become fully established until November 3rd and grew at a rate of 7.8 x 10-3 mm per hour until January 1, 2009. The ice cover reached a maximum thickness of 1.30 m on May 5th. Ice break-up began on June 21st decayed at a rate of 14.0 x 10-3 mm per hour. The surface of the lake was ice free by the end of June 26th.

Total ice thickness measurements were compared against a modeled ice thickness curve that was based on freezing-degree-days below 0°C (Lebedev 1938). For the modeled ice thickness, initial growth corresponded nicely with the SWIP data but the overall thickness was overestimated. This was likely because the model did not take insulation by snow cover into account.


Lake bottom temperature

Although no temperature measurements were made at the air-water interface, bottom temperatures were measured by the SWIP. From September to November 2008 , the bottom temperatures steadily decreased from 12°C in early September. Bottom temperatures dropped to the lowest value of 1.6°C on November 3rd and reached a stable plateau of approximately 2.0°C on November 9th until late April 2009. Temperature oscillations began on May 26th and rapidly increased after June 12th, corresponding to ice break-up.

PDF Report (PDF, 2MB)