Affiliation:
1. University of Victoria Tree-Ring Laboratory, Department of Geography, University of Victoria, Victoria, BC V8W 3R4, Canada.
Abstract
Frank Mackie Glacier repeatedly advanced across the Bowser River valley in northwestern British Columbia to impound Tide Lake during the Holocene. The most recent infilling of Tide Lake was associated with a late Little Ice Age glacier advance and ended around 1930 when the lake catastrophically drained. Over the last century Frank Mackie Glacier has retreated and down wasted to reveal multiple glaciogenic sedimentary units within the proximal faces of prominent lateral moraines. The units are separated by buried in-situ tree stumps and laterally contiguous wood mats deposited on paleosols. Dendroglaciological and radiocarbon dating of these wood remains show that Frank Mackie Glacier expanded into standing forests at 3710–3300, 2700–2200, 1700–1290, 900–500, and 250–100 cal. years BP. These advances coincide closely in time with the previously established Tide Lake glacier dam chronology and with the Holocene history of other glaciers in the Bowser River watershed. The findings emphasize the likelihood that most glaciers within northwestern British Columbia underwent substantial size and mass balance changes over the last 4000 years, and often spent hundreds of years in advanced positions before retreating.
Publisher
Canadian Science Publishing
Subject
General Earth and Planetary Sciences
Reference36 articles.
1. Recent and Planned Developments of the Program OxCal
2. Chapin et al. 2014. Ch. 22: Alaska. In Climate Change Impacts in the United States: The Third National Climate Assessment. Edited by J.M. Melillo et al. U.S. Global Change Research Program, 514.
3. Neoglaciation, Glacier-Dammed Lakes, and Vegetation Change in Northwestern British Columbia, Canada
4. The sedimentary record and Neoglacial history of Tide Lake, northwestern British Columbia
5. Cook, E.R., and Krusic, P.J. 2005. ARSTAN v. 41d: A tree-ring standardization program based on detrending and autoregressive time series modeling, with interactive graphics. Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献