ANNUAL HEAT AND MASS TRANSFER AT AN OTTAWA SITE

Abstract

The Fourier component of period 1 year is calculated for the net radiation, net solar radiation, incoming solar radiation, and ground heat flux from observations made at a grass-covered site in Ottawa in the 2-year period 1 January 1961 to 31 December 1962. The Fourier approximation of the evapotranspiration and sublimation loss is determined from estimates of the average mass transfer at the time of maximum in summer and minimum in winter. The approximation of the annual component of the convective transfer is obtained using the heat balance equation.During the 6-month period 1 April to 30 September about 48% of the net solar radiation was dissipated by evapotranspiration, 42% dissipated by longwave radiation, 7% dissipated by convection, and 3% was stored in the ground.