{"NOAAStudyId":"6219","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":"2004-03-01","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-6219.xml","doi":null,"earliestYearBP":927,"earliestYearCE":1023,"entryId":"noaa-recon-6219","funding":[],"investigators":"Cleaveland, M.K.","mostRecentYearBP":-35,"mostRecentYearCE":1985,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/6219","originalSource":null,"publication":[{"abstract":"An average of three baldcypress (Taxodium distichum) ring-width chronologies was used to reconstruct total summer (JJA) mean daily flow of the White River at Clarendon, Arkansas, for years 1023-1985. A quadratic transformation of the tree-ring data accounted for 68% (R2 adjusted for degrees of freedom lost) when regressed against total summer flow 1931-1985. The distribution of the quadratic reconstruction matched the gauged distribution much better than a simple linear model which only accounted for 62% of the variance. The model was validated by comparing regression estimates against independent data. Years with summer flow below the 25th percentile occur nonrandomly, i.e., they tend to cluster, in both the reconstructed and gauged data. Hydrologic regimes have apparently varied considerably in the past on annual to century time-scales, with extended dry and wet periods that exceeded anything in the modern record. The frequency of both wet and dry extremes has varied considerably over the last millennium. The eleventh through thirteenth centuries were not analysed due to reduced replication, but the well-replicated fourteenth and twentieth centuries both have large numbers of extremes. The twentieth century appears to have more extreme low flows than the previous centuries and also to have a large number of high flows. The practical consequences for society of variation in extremes and persistence of low flows may be considerable. Climatic change or anthropogenic changes to the watershed (e.g., widespread upland clearing for agriculture and logging of bottomland forests) may be responsible for the change in hydrologic regime during the twentieth century. ","author":{"name":"M. K. Cleaveland"},"citation":"M. K. Cleaveland. 2000. A 963-year reconstruction of summer (JJA) stream flow in the White River, Arkansas, USA, from tree-rings. The Holocene, 10(11), 33-41. doi: 10.1191/095968300666157027","edition":null,"identifier":{"id":"10.1191/095968300666157027","type":"doi","url":"http://dx.doi.org/10.1191/095968300666157027"},"issue":"11","journal":"The Holocene","pages":"33-41","pubRank":"1","pubYear":2000,"reportNumber":null,"title":"A 963-year reconstruction of summer (JJA) stream flow in the White River, Arkansas, USA, from tree-rings","type":"publication","volume":"10"}],"reconstruction":"Y","scienceKeywords":["Streamflow Reconstruction","hydrology"],"site":[{"NOAASiteId":"55901","geo":{"geoType":"Feature","geometry":{"coordinates":["34.686","-91.3154"],"type":"POINT"},"properties":{"easternmostLongitude":"-91.3154","maxElevationMeters":"53","minElevationMeters":"53","northernmostLatitude":"34.686","southernmostLatitude":"34.686","westernmostLongitude":"-91.3154"}},"locationName":"Continent>North America>United States Of America>Arkansas","mappable":"Y","paleoData":[{"NOAADataTableId":"26594","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>streamflow"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/southusa/whiteriver_flow.txt","linkText":"White River Flow Reconstruction","urlDescription":"Data 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":"x1e3 units; variance reduced over part of record; calibration data set: local instrumental data; simple linear regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":"smoothed","cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"regression analysis","cvSeasonality":"3-month period>Jun-Aug","cvShortName":null,"cvUnit":"cubic meter per second","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>streamflow"},{"cvAdditionalInfo":"x1e3 units; simple linear regression","cvDataType":"CLIMATE RECONSTRUCTIONS|TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"reconstruction material>physical measurement>ring width","cvMethod":"regression analysis","cvSeasonality":"3-month period>Jun-Aug","cvShortName":null,"cvUnit":"cubic meter per second","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>streamflow"},{"cvAdditionalInfo":"x1000 m3/s","cvDataType":"INSTRUMENTAL","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":"3-month period>Jun-Aug","cvShortName":null,"cvUnit":"cubic meter per second","cvWhat":"earth system variable>hydroclimatic variable>hydroclimate rate>streamflow"}]}],"dataTableName":"WhiteRiver2000flow","dataTableNotes":null,"earliestYear":1023,"earliestYearBP":927,"earliestYearCE":1023,"mostRecentYear":1985,"mostRecentYearBP":-35,"mostRecentYearCE":1985,"species":[],"timeUnit":"AD"}],"siteName":"Clarendon"}],"studyCode":null,"studyName":"White River, Arkansas 963-Year Streamflow Reconstruction","studyNotes":"Reconstructed June/July/August streamflow, White River, AR \n(cubic meter/second, divided by 1000)","version":"1.0","xmlId":"2558"}