CGRG Bibliography of Canadian Geomorphology
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Author : Alt, B.T.; Bourgeois, J.C.
Date : 1995.
Title : Establishing the chronology of snow and pollen deposition events on Agassiz ice cap (Ellesmere Island, Northwest Territories) from autostation records
Publication : Current Research - Geological Survey of Canada
Issue :
Page(s) : 71-79
Abstract
Regional pollen concentrations in seasonal snow layers of Agassiz Ice Cap for the years 1981-89 and preliminary results for 1991 are compared with the first quality controlled records from the experimental autostation established at the 1977 borehole site. Emphasis is placed on the distinctive, coarse grained (a) layer which is deposited by the first snow storm of each new mass balance year. These storms are sufficiently well developed to pick up, transport, and precipitate the tundra pollen, and to wash out pollen stored in the atmosphere. The extremes of (a) layer pollen concentrations reflect the climate conditions of the inland areas of the intermontane region to the southeast of the Agassiz Ice Cap station. Accurate dating using the autostation records allows the atmospheric circulation conditions to be examined resulting in valuable information on the source and pathways of the pollen, moisture, contaminants and paleoenvironmental indicators deposited with the snow of the (a) layer.
Bibliography of Canadian Geomorphology