CGRG Bibliography of Canadian Geomorphology
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Author : Bourgeois, J. C.; Koerner, R. M.; and Fisher, D. A.
Date : 2003.
Title : A 500-year record of pollen deposition on the Penny Ice Cap, Baffin Island Canada.
Publication : European Geophysical Society (EGS) - American Geophysical Union (AGU) European Union of Geosciences (EUG) Joint Assembly. Nice, France, 06 - 11 April 2003. Geophysical Research Abstracts
Issue : 5:
Page(s) : 14278.
Abstract
The upper 140-m of a 334-m surface to bedrock ice core, retrieved from the summit region of the Penny Ice Cap in 1995, was the subject of a palynological investigation. The record discussed here covers the past 500 years. Pollen concentrations range between 6 and 708 grains/L. The higher concentrations are usually attributed to a sporadic increase of alder, birch, or pine pollen. Otherwise, pollen of regional origin and those from distant sources are more or less equally represented in the profile. The lowest pollen concentrations are found between 1520 1600 AD and 1800 1860 AD, where "18O values are the more negative (isotopically cold). The melt percentages, which are an indicator of summer conditions, do not show such a direct relationship. Pollen concentrations start to increase in the mid-19th century and continue to do so in the 20th century. However, this increase is unexceptional when compared to other sections of the core.
Bibliography of Canadian Geomorphology