noaa-ocean-21650 Northern California Continental Slope Biogenic sediment geochemistry and organic matter isotope data during the last 7700 years Addison, J.A.; Barron, J.A.; Finney, B.P.; Kusler, J.; Bukry, D.; Heusser, L.E.; Alexander, C.R. Northern California Continental Slope Biogenic sediment geochemistry and organic matter isotope data during the last 7700 years 2017-03-15 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/21650 Investigator J.A. Addison Investigator J.A. Barron Investigator B.P. Finney Investigator J. Kusler Investigator D. Bukry Investigator L.E. Heusser Investigator C.R. Alexander earth science paleoclimate paleoceanography biogenic silica,null,null,weight percent,null,paleoceanography,null,null,N,wet chemical digestion; Mortlock and Froelich (1989) earth science paleoclimate paleoceanography organic carbon,null,null,weight percent,null,paleoceanography,null,elemental analysis,N,null earth science paleoclimate paleoceanography nitrogen,null,null,weight percent,null,paleoceanography,null,elemental analysis,N,null earth science paleoclimate paleoceanography carbon/nitrogen,null,null,dimensionless,null,paleoceanography,null,elemental analysis,N,molar ratio earth science paleoclimate paleoceanography delta 15N,null,null,per mil AIR,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography age,null,95% confidence interval lower bound,calendar year before present,null,paleoceanography,null,null,N,CLAM-derived sample age earth science paleoclimate paleoceanography biogenic silica,null,null,weight percent,null,paleoceanography,null,null,N,regime shift analysis; Rodionov (2004; 2006) earth science paleoclimate paleoceanography delta 13C,organic matter,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate paleoceanography age,null,95% confidence interval upper bound,calendar year before present,null,paleoceanography,null,null,N,CLAM-derived sample age earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,calendar year before present,null,paleoceanography,null,null,N,CLAM-derived sample age; best age from model probabilities earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean nitrogen isotopes geoscientificInformation 7702 cal yr BP 276 cal yr BP Complete 40.8656 40.8656 -124.573 -124.573 -569 -569 Ocean Pacific Ocean North Pacific Ocean TN062-O550>LATITUDE 40.8656>LONGITUDE -124.573 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Addison, Jason, John Barron, Bruce Finney, Jennifer Kusler, David Bukry, Linda E. Heusser, and Clark R. Alexander 2018 Quaternary International 469 96-108 10.1016/j.quaint.2017.02.021 https://www.sciencedirect.com/science/article/pii/S1040618216306358

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. STUDY NOTES: 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 Provided Keywords: California Current system, Holocene, upwelling, paleoproductivity, stable isotopes, opal, microfossils

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/addison2017/addison2017.txt Formatted Text File; Geochemistry and C and N Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11