{"NOAAStudyId":"12759","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2011-06-09","dataPublisher":"NOAA","dataType":"TREE RING","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/tree-ring","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-tree-12759.xml","doi":"https://doi.org/10.25921/zpvp-kh78","earliestYearBP":374,"earliestYearCE":1576,"entryId":"noaa-tree-12759","funding":[],"investigators":"Gray, S.T.; Pederson, G.T.; Watson, T.; Barnett, A.","mostRecentYearBP":-56,"mostRecentYearCE":2006,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/12759","originalSource":null,"publication":[{"abstract":"In western North America, snowpack has declined in recent decades, and further losses are projected through the 21st century. Here, we evaluate the uniqueness of recent declines using snowpack reconstructions from 66 tree-ring chronologies in key runoff-generating areas of the Colorado, Columbia, and Missouri River drainages. Over the past millennium, late 20th century snowpack reductions are almost unprecedented in magnitude across the northern Rocky Mountains and in their north-south synchrony across the cordillera. Both the snowpack declines and their synchrony result from unparalleled springtime warming that is due to positive reinforcement of the anthropogenic warming by decadal variability. The increasing role of warming on large-scale snowpack variability and trends foreshadows fundamental impacts on streamflow and water supplies across the western United States.","author":{"name":"Gregory T. Pederson, Stephen T. Gray, Connie A. Woodhouse, Julio L. Betancourt, Daniel B. Fagre, Jeremy S. Littell, Emma Watson, Brian H. Luckman, Lisa J. Graumlich"},"citation":"Gregory T. Pederson, Stephen T. Gray, Connie A. Woodhouse, Julio L. Betancourt, Daniel B. Fagre, Jeremy S. Littell, Emma Watson, Brian H. Luckman, Lisa J. Graumlich. 2011. The unusual nature of recent snowpack declines in the North American Cordillera. Science, 333(6040), 332-335. doi: 10.1126/science.1201570","edition":null,"identifier":{"id":"10.1126/science.1201570","type":"doi","url":"http://dx.doi.org/10.1126/science.1201570"},"issue":"6040","journal":"Science","pages":"332-335","pubRank":"1","pubYear":2011,"reportNumber":null,"title":"The unusual nature of recent snowpack declines in the North American Cordillera","type":"publication","volume":"333"}],"reconstruction":"N","scienceKeywords":["hydrology","drought"],"site":[{"NOAASiteId":"52914","geo":{"geoType":"Feature","geometry":{"coordinates":["42.85","-109.6333"],"type":"POINT"},"properties":{"easternmostLongitude":"-109.6333","maxElevationMeters":"2431","minElevationMeters":"2431","northernmostLatitude":"42.85","southernmostLatitude":"42.85","westernmostLongitude":"-109.6333"}},"locationName":"Continent>North America>United States Of America>Wyoming","mappable":"Y","paleoData":[{"NOAADataTableId":"21092","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/wy043.txt","linkText":"wy043.txt","urlDescription":"Correlation Stats","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/wy043.rwl","linkText":"wy043.rwl","urlDescription":"Raw Measurements","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999","cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimeter","cvWhat":"physical property>length>total ring width"}]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/northamerica/usa/wy043-noaa.rwl","linkText":"wy043-noaa.rwl","urlDescription":"Raw Measurements - NOAA Template File","variables":[{"cvAdditionalInfo":"Tree ID: BLE 191; 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