THE ESTABLISHMENT OF CARBON DIOXIDE CONCENTRATION GRADIENTS IN ONTARIO WOODLANDS

Abstract

Carbon dioxide concentrations were measured in a number of Ontario woodlands with an infrared gas analyzer. Little evidence of season variation in the concentration of carbon dioxide was obtained. Measurements over 24-hour periods revealed the existence of high concentrations, frequently exceeding 500 p.p.m. at night during midsummer. The high concentrations dropped rapidly at sunrise.The existence of extreme stratification of carbon dioxide which had been reported by earlier workers was not confirmed.