Modifications Necessary to Use Standard Dispersion Models at High Latitudes

Sue Ann Bowling, Geophysical Institute, University of Alaska, Fairbanks, AK 99775, USA

Standard air pollution dispersion models are inappropriate for application at high latitudes. Recent measurements of 10 m mixing heights with 0.5 meter per second winds in Fairbanks emphasize this inapplicability. It is essential that horizontal and vertical dispersion parameters be specified separately under these conditions. It is also important that the solar radiation input to vertical stability categories at high latitudes be determined on the basis of solar elevation angle, rather than by time after sunrise or before sunset.

Published 1985 in Atmospheric Environment 19, 93-97