A Preliminary Study of the Energy Budget of Lake Ontario

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Abstract
Recent bathythermographic surveys carried out on the research vessel Porte Dauphine have provided estimates of heat content for Lake Ontario and permitted a preliminary study of its energy budget. The imbalance between the absorbed short wavelength sun and sky radiation, and the losses due to evaporation, sensible heat conduction and net long wavelength back radiation, result in heating of lake water from March to August and cooling from September or October to February. The peak heat content lags the peak surface temperature by about one month. The amount of energy advected into the lake is relatively small compared with other terms in the energy budget. Thus, energy budget calculations do not depend upon the accuracy with which the water budget is known. The principal difficulty in applying present techniques for determination of an energy budget is lack of meterological data over the lake surface.

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