CGRG Bibliography of Canadian Geomorphology
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Author : D Andrea,W.J.; and Bradley, R.S.
Date : 2009.
Title : A 5,000 year alkenone-based temperature reconstruction from the High Arctic (Lower Murray Lake, Nunavut Canada).
Publication : 2009 American Geophysical Union Fall Meeting. December 14-18, 2009. San Francisco, California, USA.
Issue :
Page(s) :
Abstract
To understand the spatial and temporal patterns of Holocene Arctic climate variability and the associated forcing mechanisms requires dense networks of quantitative temperature and precipitation records. This is a particular challenge in the Arctic where there is a scarcity of natural archives for paleoclimate reconstruction to extend the important yet spatially-limited information provided by ice cores. Therefore, new quantitative approaches for paleotemperature reconstruction from terrestrial archives are extremely important for advancing our understanding of Arctic climate variability. We present a 5,000yr-long, high-resolution, alkenone-based summer temperature reconstruction from Lower Murray Lake on Northern Ellesmere Island, Nunavut Canada (81° 21' N, 69° 32' W). Alkenone paleothermometry (Uk37) has been widely used for generating sea surface temperature records, but has been largely overlooked for reconstructing past lake water temperatures. The varved sediments of Lower Murray Lake allow Uk37-based temperature reconstruction at sub-decadal timescales and we directly compare the results with the varve thickness record from the same lake, which has been interpreted as a proxy for summer air temperature (Cook et al., 2008). Our results indicate that lacustrine alkenone paleothemometry is extremely promising for Arctic Paleoclimatology.
Bibliography of Canadian Geomorphology