A HIGH ARCTIC HYDROLOGICAL STUDY USING STABLE ISOTOPES, CORNWALLIS ISLAND, CANADA

摘要

Large areas of Canada's Northwest Territories receive fluxes of organic aerosols from external sources via the Arctic haze phenomenon. On Cornwallis Island, a well defined 25 km~2 drainage basin (latitude 75°03'N, longitude 93°50'W) focused around a 0.38 km~2 lake informally named 'Amituk Lake' was selected for a multi-year, multidisciplinary study which is attempting to trace the post-depositional migration of these compounds in the local environment. The calculation of an accurate water balance for this basin is an important component of the study. During the 1994 summer field season an effort was made to determine the significance of groundwater contributions (a previously uninvestigated parameter) to this flow system. An ~(18)O and ~2H sampling programme combined with a physical measurement regimen was undertaken to achieve this objective.