Critical analysis of atmospheric turbidity and precipitable water at five canadian stations

摘要

Global and diffuse radiation and surface meteorological measurements at Edmonton, Montreal, Port Hardy, Toronto and Winnipeg for the years 1977-1984 are analyzed to yield estimates of atmospheric precipitable water and turbidity. Three methods of estimating the precipitable water and two methods of estimating the turbidity are used and compared. Measurements of pyranometer response as a function of zenith angle are used to correct the global radiation measurements. Turbidity is corrected for the effect of circumsolar radiation includen in the direct radiation obtained from the global and diffuse radiation meausrements. A comparison with earlier precipitable water and turbidity results is include4d.