{"NOAAStudyId":"23710","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":"2018-03-21","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-23710.xml","doi":null,"earliestYearBP":6000,"earliestYearCE":-4050,"entryId":"noaa-recon-23710","funding":[{"fundingAgency":"US National Science Foundation","fundingGrant":"AGS-1203701, AGS-1554998"}],"investigators":"Hermann, N.W.; Oster, J.L.; Ibarra, D.E.","mostRecentYearBP":6000,"mostRecentYearCE":-4050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/23710","originalSource":null,"publication":[{"abstract":"Mid-Holocene paleoclimate proxy records from drought-sensitive western North America suggest widespread aridity in areas dominated by winter precipitation. We present spatial comparisons of a diverse network of moisture-sensitive proxies with 12 global circulation model simulations from the Paleoclimate Model Intercomparison Project to determine the most important atmospheric drivers behind observed mid-Holocene aridity in this region. Although model-proxy agreement is low for most models, in part reflecting small mid-Holocene precipitation anomalies, three show relatively strong agreement by successfully simulating arid conditions across the Pacific Northwest. The model that shows the strongest spatial agreement with the proxy network reveals an anticyclonic wind anomaly that is similar to but weaker than anomalies noted during westwide drought episodes of the past 500 years. This model suggests increased transient upper level ridging that reduced winter water vapor transport from the south-west during the mid-Holocene. These mechanisms are similar to those suggested to have supported megadrought conditions in western North America during the Medieval Climate Anomaly and which are also simulated in anthropogenic warming scenarios. Future work on quantitative proxy records to enhance temporal and spatial coverage, and explicitly address issues of seasonality, will improve the quality of future climate model–data comparison studies.","author":{"name":"Hermann, N.W., J.L. Oster, and D.E. Ibarra"},"citation":"Hermann, N.W., J.L. Oster, and D.E. Ibarra. 2018. Spatial patterns and driving mechanisms of mid-Holocene hydroclimate in western North America. Journal of Quaternary Science. . doi: 10.1002/jqs.3023","edition":null,"identifier":{"id":"10.1002/jqs.3023","type":"doi","url":"http://dx.doi.org/10.1002/jqs.3023"},"issue":null,"journal":"Journal of Quaternary Science","pages":null,"pubRank":"1","pubYear":2018,"reportNumber":null,"title":"Spatial patterns and driving mechanisms of mid-Holocene hydroclimate in western North America","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Precipitation Reconstruction"],"site":[{"NOAASiteId":"57618","geo":{"geoType":"Feature","geometry":{"coordinates":["28","50","-125","-105"],"type":"POLYGON"},"properties":{"easternmostLongitude":"-105","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"50","southernmostLatitude":"28","westernmostLongitude":"-125"}},"locationName":"Continent>North America","mappable":"N","paleoData":[{"NOAADataTableId":"35533","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth 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BP"},{"NOAADataTableId":"35535","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>precipitation"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/hydroclimate/hermann2018/hermann2018-RecordsUsed_Metadata.txt","linkText":"Metadata for Records Used in Study","urlDescription":"NOAA Synthesis Template File","variables":[]}],"dataTableName":"RecordMetadata WNAm Sites Hermann2018","dataTableNotes":null,"earliestYear":6000,"earliestYearBP":6000,"earliestYearCE":-4050,"mostRecentYear":6000,"mostRecentYearBP":6000,"mostRecentYearCE":-4050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Central Western North America"}],"studyCode":null,"studyName":"Western North America Network of Moisture Sensitive Proxy Records from 6000 yr BP","studyNotes":"Provided Keywords: mid-Holocene, proxy-model comparison, terrestrial hydroclimate","version":"1.0","xmlId":"21874"}