CGRG Bibliography of Canadian Geomorphology
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Author : Fortin, D.; and Lamoureux, S.D.
Date : 2007.
Title : Low-frequency hydroclimatic variability in northeastern and northern North America since 1550 AD.
Publication : CANQUA Ottawa 2007. Canadian Quaternary Association Conference, June 4-8, 2007. Carleton University, Ottawa, Ontario, Canada.
Issue :
Page(s) :
Abstract
The analysis sea surface temperature, surface air temperature, precipitation and streamflow regimes suggest the presence of a multidecadal mode of climate variability affecting landmasses adjacent to the North Atlantic Ocean (Schlesinger and Ramankutty 1994; Kushnir 1994, Enfield et al. 2001). Knowledge relative to the duration and the effects of the Atlantic Multidecadal Oscillation (AMO) on regional long term climate variability is although limited by the short length of hydroclimatic instrumental records. We present here a network of clastic varve and dendrological series that provide high resolution of boreal summer runoff and Arctic snowmelt variability over the past 450 years. The hydroclimatic proxies show a coherent, AMO-like pattern of variability active since the late 16th and the early 18th century in the Canadian Arctic and southeastern boreal regions, respectively. Positive AMO phases are associated with more intense spring runoff in the Arctic and with increased summer moisture availability in the southeastern boreal forest. These results demonstrate a widespread hydroclimatic response in eastern and northern North America to low frequency changes in North Atlantic sea surface temperatures (SST).
Bibliography of Canadian Geomorphology