{"NOAAStudyId":"26030","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":"2019-02-07","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-26030.xml","doi":null,"earliestYearBP":450,"earliestYearCE":1500,"entryId":"noaa-recon-26030","funding":[],"investigators":"Wahl, E.R.; Zorita, E.; Trouet, V.; Taylor, A.H.","mostRecentYearBP":-30,"mostRecentYearCE":1980,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/26030","originalSource":null,"publication":[{"abstract":"Moisture delivery in California is largely regulated by the strength and position of the North Pacific jet stream (NPJ), winter high-altitude winds that influence regional hydroclimate and forest fire during the following warm season. We use climate model simulations and paleoclimate data to reconstruct winter NPJ characteristics back to 1600 CE to identify the influence of NPJ behavior on moisture and forest fire extremes in California before and during the more recent period of fire suppression. Maximum zonal NPJ velocity is lower and northward shifted and has a larger latitudinal spread during presuppression dry and high-fire extremes. Conversely, maximum zonal NPJ is higher and southward shifted, with narrower latitudinal spread during wet and low-fire extremes. These NPJ, precipitation, and fire associations hold across pre–20th-century socioecological fire regimes, including Native American burning, postcontact disruption and native population decline, and intensification of forest use during the later 19th century. Precipitation extremes and NPJ behavior remain closely linked in the 20th and 21st centuries, but fire extremes become uncoupled due to fire suppression after 1900. Simulated future conditions in California include more wet-season moisture as rain (and less as snow), a longer fire season, and higher temperatures, leading to drier fire-season conditions independent of 21st-century precipitation changes. Assuming continuation of current fire management practices, thermodynamic warming is expected to override the dynamical influence of the NPJ on climate–fire relationships controlling fire extremes in California. Recent widespread fires in California in association with wet NPJ extremes may be early evidence of this change.","author":{"name":"Wahl, Eugene R., Eduardo Zorita, Valerie Trouet, and Alan H. Taylor"},"citation":"Wahl, Eugene R., Eduardo Zorita, Valerie Trouet, and Alan H. Taylor. 2019. Jet stream dynamics, hydroclimate, and fire in California: 1600 CE to present. Proceedings of the National Academy of Sciences. . ","edition":null,"identifier":null,"issue":null,"journal":"Proceedings of the National Academy of Sciences","pages":null,"pubRank":"1","pubYear":2019,"reportNumber":null,"title":"Jet stream dynamics, hydroclimate, and fire in California: 1600 CE to present","type":"publication","volume":null}],"reconstruction":"Y","scienceKeywords":["Atmospheric and Oceanic Circulation Patterns Reconstruction"],"site":[{"NOAASiteId":"57839","geo":{"geoType":"Feature","geometry":{"coordinates":["-60","70","120","-60"],"type":"POLYGON"},"properties":{"easternmostLongitude":"-60","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"70","southernmostLatitude":"-60","westernmostLongitude":"120"}},"locationName":"Ocean>Pacific Ocean","mappable":"N","paleoData":[{"NOAADataTableId":"38513","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>reconstructions>atmospheric circulation"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/wahl2019/","linkText":"netCDF files of SLP and 200mb U, V and geopotential height","urlDescription":"Data Folder","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>reconstructions>atmospheric circulation"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/wahl2019/wahl2019-readme.txt","linkText":"Metadata for Pacific Atmospheric Reconstruction","urlDescription":"NOAA Template File","variables":[]}],"dataTableName":"Pacific Atmospheric Wahl2019","dataTableNotes":null,"earliestYear":1500,"earliestYearBP":450,"earliestYearCE":1500,"mostRecentYear":1980,"mostRecentYearBP":-30,"mostRecentYearCE":1980,"species":[],"timeUnit":"AD"}],"siteName":"Pacific Ocean and American continents"}],"studyCode":null,"studyName":"Reconstructions of North Pacific atmospheric circulation since 1500 AD based on soil moisture, air temperature, and precipitation in Southwest US and output of paleoclimate simulations","studyNotes":null,"version":"1.0","xmlId":"64334"}