A 258-year record of precipitation as snow from tree-rings, Southern Coast Mountains, British Columbia

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dc.contributor.author MacKinnon, Stuart James
dc.date.accessioned 2017-01-03T22:19:25Z
dc.date.available 2017-01-03T22:19:25Z
dc.date.copyright 2016 en_US
dc.date.issued 2017-01-03
dc.identifier.uri http://hdl.handle.net/1828/7702
dc.description.abstract In Pacific North America, a substantial amount of the streamflow available during the dry summer months originates from melting mountain snowpacks. Since the start of the twenty-first century, these mountain snowpacks have been declining due to the impacts of global climate change and could have severe implications for future water availability in many regions. To develop robust predictive models of future water availability derived from mountainous snowpacks, the longest possible data record is required. However, instrumental data for snow measurements, when available, are limited to a length of only five or six decades in most regions of Pacific North America. In this study, tree-rings from snow-depth sensitive tree species (mountain hemlock (Tsuga mertensiana (Bong.) Carrière) and subalpine fir (Abies lasiocarpa (Hook.) Nutt.)) were used as a proxy to develop a 258-year record of precipitation as snow (PAS) for the southern Coast Mountains of British Columbia. Four snow models were evaluated based on a suite of dendroclimatological model diagnostics. From these, one PAS reconstruction was carried out. The reconstruction was unable to properly validate using the leave-one-out cross validation method. This result is attributed to the combination of a short calibration period, a potentially weak climate signal, and the absence of signal enhancement. Despite this outcome the research resulted in number of inferences and recommendations useful for future research. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.subject dendroclimatology en_US
dc.subject precipitation as snow en_US
dc.subject mountain snowpack en_US
dc.subject southern Coast Mountains en_US
dc.subject British Columbia en_US
dc.subject dendrohydrology en_US
dc.title A 258-year record of precipitation as snow from tree-rings, Southern Coast Mountains, British Columbia en_US
dc.type Thesis en_US
dc.contributor.supervisor Smith, Daniel J.
dc.degree.department Department of Geography en_US
dc.degree.level Master of Science M.Sc. en_US
dc.description.scholarlevel Graduate en_US

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