Investigation of the Effect of Ice Nuclei from a Cement Plant on Downwind Precipitation in Southern Alberta


  • Daryl V O'Dowd Department of Geography University of Alberta Edmonton, Alberta


In an earlier study, ice nuclei were measured in airborne effluent over a cement producing facility in southern Alberta. To investigate the possibility of inadvertent weather modification due to the effluent, two predictor schemes were developed using five weather stations to determine whether precipitation amounts or precipitation events were anomalous at a sixth station downwind of the facility. Despite departures from predicted values, no linear correlation could be confidently made between mill production and precipitation anomalies at Calgary, the downwind and sixth station, during the ten year analysis period from 1981 to 1990. Inadvertent precipitation modification does not seem to have taken place.




Scientific Papers