{"NOAAStudyId":"18295","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":"2015-03-26","dataPublisher":"NOAA","dataType":"CLIMATE RECONSTRUCTIONS","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/climate-reconstruction","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-recon-18295.xml","doi":null,"earliestYearBP":379,"earliestYearCE":1571,"entryId":"noaa-recon-18295","funding":[],"investigators":"Diaz, H.F.; Wahl, E.R.","mostRecentYearBP":-27,"mostRecentYearCE":1977,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/18295","originalSource":null,"publication":[{"abstract":"An analysis of the October 2013–September 2014 precipitation in the western United States and in particular over the California-Nevada region suggests this anomalously dry season, while extreme, is not unprecedented in comparison with the ~120-year long instrumental record of water year (WY, October–September) totals, and in comparison with a 407-year WY precipitation reconstruction back to 1571. Over this longer period nine other years are known or estimated to have been nearly as dry or drier than WY 2014. The three-year deficit for WY's 2012-2014, which in California exceeded the annual mean precipitation, is more extreme but also not unprecedented, occurring three other times over the past ~ 440 years in the reconstruction. WY precipitation has also been deficient on average for the past 14 years, and such a run of predominantly dry WY’s is also a rare occurrence in our merged reconstructed plus instrumental period record.","author":{"name":"Henry F. Diaz and Eugene R. Wahl"},"citation":"Henry F. Diaz and Eugene R. Wahl. 2015. Recent California Water Year Precipitation Deficits: A 440-year Perspective. Journal of Climate, 28(12), 4637-4652. doi: 10.1175/JCLI-D-14-00774.1","edition":null,"identifier":{"id":"10.1175/JCLI-D-14-00774.1","type":"doi","url":"http://dx.doi.org/10.1175/JCLI-D-14-00774.1"},"issue":"12","journal":"Journal of Climate","pages":"4637-4652","pubRank":"1","pubYear":2015,"reportNumber":null,"title":"Recent California Water Year Precipitation Deficits: A 440-year Perspective","type":"publication","volume":"28"}],"reconstruction":"Y","scienceKeywords":["drought","Precipitation Reconstruction"],"site":[{"NOAASiteId":"56501","geo":{"geoType":"Feature","geometry":{"coordinates":["32.5","42","-124.4","-116.5"],"type":"POLYGON"},"properties":{"easternmostLongitude":"-116.5","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"42","southernmostLatitude":"32.5","westernmostLongitude":"-124.4"}},"locationName":"Continent>North America>United States Of America","mappable":"N","paleoData":[{"NOAADataTableId":"28654","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>precipitation"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/diaz2015/diaz-wahl2015.txt","linkText":"California and western Nevada reconstruction","urlDescription":"Formatted Text File","variables":[{"cvAdditionalInfo":"PC spatial regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":"one root mean square error lower bound","cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"regression analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"},{"cvAdditionalInfo":"PC spatial regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":"one root mean square error lower bound","cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"principal component analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|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":"PC spatial regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"regression analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"},{"cvAdditionalInfo":"PC spatial regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"principal component analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"},{"cvAdditionalInfo":"PC spatial regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":"one root mean square error upper bound","cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"regression analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"},{"cvAdditionalInfo":"PC spatial regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":"one root mean square error upper bound","cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"principal component analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"}]},{"NOAAKeywords":["earth science>paleoclimate>reconstructions>precipitation"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/diaz2015/Main_Gridded_WY_Precip_Reconstruction.txt","linkText":"Full grid of reconstruction data","urlDescription":"ASCII File","variables":[{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|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":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree north","cvWhat":"sampling metadata>latitude"},{"cvAdditionalInfo":null,"cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"degree east","cvWhat":"sampling metadata>longitude"},{"cvAdditionalInfo":"principal components regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"regression analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"},{"cvAdditionalInfo":"principal components regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"principal component analysis","cvSeasonality":"annual>Oct-Sep","cvShortName":null,"cvUnit":"inch","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>precipitation"}]}],"dataTableName":"CA-wNV precip Diaz-Wahl15","dataTableNotes":null,"earliestYear":1571,"earliestYearBP":379,"earliestYearCE":1571,"mostRecentYear":1977,"mostRecentYearBP":-27,"mostRecentYearCE":1977,"species":[],"timeUnit":"AD"}],"siteName":"California and western Nevada"}],"studyCode":null,"studyName":"California and Western Nevada Precipitation Reconstruction for 1571-1977 AD","studyNotes":"Water year (October through following September) precipitation for California and western Nevada is reconstructed using existing western United States river flow reconstructions as predictor data.  The full 0.5x0.5 degree gridded EV reconstruction for the entire continental United States (CONUS) west of 95 W from which the California and western Nevada reconstruction is extracted is included as a separate ASCII file (values are expressed as standardized anomalies).  The rows of this file represent years AD (listed in the first column), starting with the third row; the rest of the columns provide the gridded reconstruction data, organized according to all longitudes for each latitude going from W to E.  The first two rows (except for the 0 placeholder values in the first column) give the latitude (first row) and longitude (second row) information for each column.","version":"1.0","xmlId":"15997"}