Littell, J. S.McGuire-Elsner, M.Whitely Binder, L.C.Snover, A. K.2019-08-262019-08-262009-06Littell, J.S., M. McGuire Elsner, L.C. Whitely Binder, and A.K. Snover (eds). 2009. The Washington Climate Change Impacts Assessment: Evaluating Washington's Future in a Changing Climate - Executive Summary. In The Washington Climate Change Impacts Assessment: Evaluating Washington's Future in a Changing Climate, Climate Impacts Group, University of Washington, Seattle, Washington. Available at: www.cses.washington.edu/db/pdf/wacciaexecsummary638.pdfBib# 966968http://hdl.handle.net/20.500.11867/1772424 page digital document provided as a pdf file, 10.6MBTemperature records indicate that Pacific Northwest temperatures increased 1.5°F since 1920. Climate models used in the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report simulate the same historical warming by including both human and natural causes, and point to much greater warming for the next century. These models project increases in annual temperature of, on average, 2.0°F by the 2020s, 3.2°F by the 2040s, and 5.3°F by the 2080s (compared to 1970 to 19992), averaged across all climate models3. Projected changes in annual precipitation, averaged over all models, are small (+1 to +2%), but some models project an enhanced seasonal precipitation cycle with changes toward wetter autumns and winters and drier summers. Increases in extreme high precipitation in western Washington and reductions in the Cascades snowpack are key projections consistent among different projections of a high-resolution regional climate model.en-USNo Known Copyright The organization that has made the Item available reasonably believes that the Item is not restricted by copyright or related rights, but a conclusive determination could not be made. Please refer to the organization that has made the Item available for more information. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use.Climate ChangeYakima BasinHydrologyResource managementHabitattemperatureTechnical Report