Glaciolacustrine varved sediment as an alpine hydroclimatic proxy |
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Authors: | K R Hodder R Gilbert J R Desloges |
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Institution: | (1) Department of Geography, Queen’s University Kingston, Kingston, ON, Canada, K7L 3N6;(2) Department of Geography, University of Toronto, Toronto, ON, Canada, M5S 3G3 |
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Abstract: | The physical significance of a negative correlation between a varve record from Mud Lake, British Columbia, and temperature
is discussed in the context of a process-network. The process-network is defined as the system of temporally and spatially
connected processes involved in the transfer of a signal from climate to varved glaciolacustrine sediment. The six systems
defining the network include climate, glacier, fluvial, geomorphic, terrestrial biologic and lacustrine systems to which each
process belongs. A literature review outlines significant variation in the strength and character of correlations between
components of the process-network and highlights that more comprehensive interpretations of varves as a hydroclimatic proxy
require an improved understanding of the process-network. Documenting each process in the network is integral to informing
a more complete model of this system, identifying processes that constitute signal transfer and assessing hydroclimatic proxies
based on linear correlation. Such documentation is of growing importance as varved lacustrine sediments are increasingly used
as a hydroclimatic proxy. The complex nature of the process-network requires greater emphasis on interdisciplinary cooperation
and alternative methods to the linear statistical model. |
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Keywords: | Varves Hydroclimatic proxy Correlation Complexity |
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