{"NOAAStudyId":"21650","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":"2017-03-15","dataPublisher":"NOAA","dataType":"PALEOCEANOGRAPHY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/paleoceanography","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-ocean-21650.xml","doi":null,"earliestYearBP":7702,"earliestYearCE":-5752,"entryId":"noaa-ocean-21650","funding":[{"fundingAgency":"US Geological Survey Climate Research and Development Program","fundingGrant":null}],"investigators":"Addison, J.A.; Barron, J.A.; Finney, B.P.; Kusler, J.; Bukry, D.; Heusser, L.E.; Alexander, C.R.","mostRecentYearBP":276,"mostRecentYearCE":1674,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/21650","originalSource":null,"publication":[{"abstract":"The Holocene upwelling history of the northern California continental slope is examined using the high-resolution record of TN062-O550 (40.9°N, 124.6°W, 550 m water depth). This 7-m-long marine sediment core spans the last ~7500 years, and we use it to test the hypothesis that marine productivity in the California Current System (CCS) driven by coastal upwelling has co-varied with Holocene millennial-scale warm intervals. A combination of biogenic sediment concentrations (opal, total organic C, and total N), stable isotopes (organic matter d13C and bulk sedimentary d15N), and key microfossil indicators of upwelling were used to test this hypothesis. The record of biogenic accumulation in TN062-O550 shows considerable Holocene variability despite being located within 50 km of the mouth of the Eel River, which is one of the largest sources of terrigenous sediment to the Northeast Pacific Ocean margin. A key time interval beginning at ~2900 calibrated years before present (cal yr BP) indicates the onset of modern upwelling in the CCS, and this period also corresponds to the most intense period of upwelling in the last 7500 years. When these results are placed into a regional CCS context during the Holocene, it was found that the timing of upwelling intensification at TN062-O550 corresponds closely to that seen at nearby ODP Site 1019, as well as in the Santa Barbara Basin of southern California. Other CCS records with less refined age control show similar results, which suggest late Holocene upwelling intensification may be synchronous throughout the CCS. Based on the strong correspondence between the alkenone sea surface temperature record at ODP Site 1019 and the onset of late Holocene upwelling in northern California, we suggest that CCS warming may be conducive to upwelling intensification, though future changes are unclear as the mechanisms forcing SST variability may differ.","author":{"name":"Addison, Jason, John Barron, Bruce Finney, Jennifer Kusler, David Bukry, Linda E. Heusser, and Clark R. Alexander"},"citation":"Addison, Jason, John Barron, Bruce Finney, Jennifer Kusler, David Bukry, Linda E. Heusser, and Clark R. Alexander. 2018. A Holocene record of ocean productivity and upwelling from the northern California continental slope. Quaternary International, 469, 96-108. doi: 10.1016/j.quaint.2017.02.021","edition":null,"identifier":{"id":"10.1016/j.quaint.2017.02.021","type":"doi","url":"http://dx.doi.org/10.1016/j.quaint.2017.02.021"},"issue":null,"journal":"Quaternary International","pages":"96-108","pubRank":"1","pubYear":2018,"reportNumber":null,"title":"A Holocene record of ocean productivity and upwelling from the northern California continental slope","type":"publication","volume":"469"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57072","geo":{"geoType":"Feature","geometry":{"coordinates":["40.8656","-124.573"],"type":"POINT"},"properties":{"easternmostLongitude":"-124.573","maxElevationMeters":"-569","minElevationMeters":"-569","northernmostLatitude":"40.8656","southernmostLatitude":"40.8656","westernmostLongitude":"-124.573"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"32624","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleocean>carbon isotopes","earth science>paleoclimate>paleocean>geochemistry","earth science>paleoclimate>paleocean>nitrogen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/addison2017/addison2017.txt","linkText":"Geochemistry and C and N Isotope Data","urlDescription":"Formatted Text File","variables":[{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"centimeter","cvWhat":"depth variable>depth"},{"cvAdditionalInfo":"CLAM-derived sample age","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"95% confidence interval lower bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"CLAM-derived sample age","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":"95% confidence interval upper bound","cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"CLAM-derived sample age; best age from model probabilities","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"calendar year before present","cvWhat":"age variable>age"},{"cvAdditionalInfo":"wet chemical digestion; Mortlock and Froelich (1989)","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"},{"cvAdditionalInfo":"regime shift analysis; Rodionov (2004; 2006)","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>compound>inorganic compound>silicon dioxide>biogenic silica"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>carbon>organic carbon"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"weight percent","cvWhat":"chemical composition>element or single-element molecule>nitrogen"},{"cvAdditionalInfo":"molar ratio","cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"elemental analysis","cvSeasonality":null,"cvShortName":null,"cvUnit":"dimensionless","cvWhat":"chemical composition>element or compound ratio>carbon/nitrogen"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":"biological material>bulk biological material>organic matter","cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil VPDB","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C"},{"cvAdditionalInfo":null,"cvDataType":"PALEOCEANOGRAPHY","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"isotope ratio mass spectrometry","cvSeasonality":null,"cvShortName":null,"cvUnit":"per mil AIR","cvWhat":"chemical composition>isotope>isotope ratio>delta 15N"}]}],"dataTableName":"TN062-O550 Addison17","dataTableNotes":"For additional chronology and age-depth model details, please see accompanying paper by Barron et al. (2017) in Quaternary International","earliestYear":7702,"earliestYearBP":7702,"earliestYearCE":-5752,"mostRecentYear":276,"mostRecentYearBP":276,"mostRecentYearCE":1674,"species":[],"timeUnit":"cal yr BP"}],"siteName":"TN062-O550"}],"studyCode":null,"studyName":"Northern California Continental Slope Biogenic sediment geochemistry and organic matter isotope data during the last 7700 years","studyNotes":"Biogenic sediment geochemistry and organic matter isotopes (C & N) applied to reconstructing Holocene upwelling intensity of California Current during last ~7500 years. Measurement precisions- opal: +/- 0.4 wt%; total organic carbon: +/- 0.32 wt%; total nitrogen: +/- 0.32 wt%; d13C: +/- 0.04 permille; d15N: +/- 0.20 permille\n       Provided Keywords: California Current system, Holocene, upwelling, paleoproductivity, stable isotopes, opal, microfossils\n","version":"1.0","xmlId":"19628"}