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Climate change impacts on mountain snowpack presented in a knowledge to action framework

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dc.contributor.advisor Nolin, Anne
dc.creator Sproles, Eric Allan
dc.date.accessioned 2012-04-10T15:36:51Z
dc.date.available 2012-04-10T15:36:51Z
dc.date.copyright 2012-02-16
dc.date.issued 2012-02-16
dc.identifier.uri http://hdl.handle.net/1957/28640
dc.description Graduation date: 2012 en_US
dc.description.abstract Throughout many of the world’s mountain ranges snowpack accumulates during the winter and into the spring, providing a natural reservoir for water. As this reservoir melts, it fills streams and recharges groundwater for over 1 billion people globally. Despite its importance to water resources, our understanding of the storage capacity of mountain snowpack is incomplete. This partial knowledge limits our abilities to assess the impact that projected climate conditions will have on mountain snowpack and water resources. While understanding the effect of projected climate on mountain snowpack is a global question, it can be best understood at the basin scale. It is at this level that decision makers and water resource managers base their decisions and require a clarified understanding of basin's mountain snowpack. The McKenzie River Basin located in the central-western Cascades of Oregon exhibits characteristics typical of many mountain river systems globally and in the Pacific Northwestern United States. Here snowmelt provides critical water supply for hydropower, agriculture, ecosystems, recreation, and municipalities. While there is a surplus of water in winter, the summer months see flows reach a minimum and the same groups have to compete for a limited supply. Throughout the Pacific Northwestern United States, current analyses and those of projected future climate change impacts show rising temperatures, diminished snowpacks, and declining summertime streamflow. The impacts of climate change on water resources presents new challenges and requires fresh approaches to understanding problems that are only beginning to be recognized. Climate change also presents challenges to decision makers who need new kinds of climate and water information, and will need the scientific research community to help provide improved means of knowledge transfer. This dissertation quantified the basin-wide distribution of snowpack across multiple decades in present and in projected climate conditions, describing a 56% decrease in mountain snowpack with regional projected temperature increases. These results were used to develop a probabilistic understanding of snowpack in projected climates. This section described a significant shift in statistical relations of snowpack. One that would be statistically likely to accumulate every 3 out of 4 years would accumulate in 1 out of 20 years. Finally this research identifies methods to improved knowledge transfer from the research community to water resource professionals. Implementation of these recommendations would enable a more effective means of dissemination to stakeholders and policy makers. While this research focused only on the McKenzie River Basin, it has regional applications. Processes affecting snowpack in the McKenzie River Basin are similar to those in many other maritime, forested Pacific Northwest watersheds. The framework of this research could also be applied to regions outside of the Pacific Northwestern United States to gain a similar level of understanding of climate impacts on mountain snowpack. en_US
dc.language.iso en_US en_US
dc.relation Oregon Explorer en_US
dc.subject mountain snowpack en_US
dc.subject hydrologic model en_US
dc.subject climate change en_US
dc.subject decision support tool en_US
dc.subject probabilistic snowpack en_US
dc.subject.lcsh Snow -- Cascade Range en_US
dc.subject.lcsh Water supply -- Effect of global warming on -- Oregon -- McKenzie River Watershed en_US
dc.subject.lcsh Climatic changes -- Cascade Range en_US
dc.subject.lcsh Climatic changes -- Oregon -- McKenzie River Watershed en_US
dc.subject.lcsh Runoff -- Cascade Range en_US
dc.subject.lcsh Runoff -- Oregon -- McKenzie River Watershed en_US
dc.subject.lcsh Mountain watersheds -- Cascade Range en_US
dc.title Climate change impacts on mountain snowpack presented in a knowledge to action framework en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Doctor of Philosophy (Ph. D.) in Water Resources Science en_US
dc.degree.level Doctoral en_US
dc.degree.discipline Science en_US
dc.degree.grantor Oregon State University en_US
dc.contributor.committeemember McDonnell, Jeffery
dc.contributor.committeemember Bolte, John
dc.contributor.committeemember Tague, Christina
dc.contributor.committeemember Colwell, Rick
dc.description.peerreview no en_us


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