# Santa Barbara Basin Stable Isotope and Foraminiferal Assemblage Data to 735 ka #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/19762 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/white2013/white2013-11jpc-uvig.txt # # Archive: Paleoceanography # # Parameter_Keywords: oxygen isotopes, carbon isotopes, population abundance #--------------------------------------- # Contribution_Date # Date: 2016-02-04 #--------------------------------------- # Title # Study_Name: Santa Barbara Basin Stable Isotope and Foraminiferal Assemblage Data to 735 ka #--------------------------------------- # Investigators # Investigators: White, Sarah M.; Hill, Tessa M.; Kennett, James P.; Behl, Richard J.; Nicholson, Craig #--------------------------------------- # Description_Notes_and_Keywords # Description: # Provided Keywords: stadial, interstadial, glacial #--------------------------------------- # Publication # Authors: White, S.M., T.M. Hill, J.P. Kennett, R.J. Behl, and C. Nicholson # Published_Date_or_Year: 2013 # Published_Title: Millennial-scale variability to 735 ka: High-resolution climate records from Santa Barbara Basin, CA # Journal_Name: Paleoceanography # Volume: 28 # Issue: # Pages: 1-14 # Report Number: # DOI: 10.1002/palo.20022, 2013 # Full_Citation: # Abstract: Determining the ultimate cause and effect of millennial-scale climate variability remains an outstanding problem in paleoceanography, partly due to the lack of high-resolution records predating the last glaciation. Recent cores from Santa Barbara Basin provide ~2500–5700 year “windows” of climate with ~10–50 year resolution. Ages for three cores, determined by seismic stratigraphic correlation, oxygen isotope stratigraphy, and biostratigraphy, date to ~293 ka (MIS 8), ~450 ka (MIS 12), and ~735 ka (MIS 18). These records sample the Late Pleistocene, during which the 100 kyr cycle strengthened and the magnitude of glacial-interglacial cyclicity increased. Thus, these records provide a test of the dependence of millennial-scale behavior on variations in glacial-interglacial cyclicity. The stable isotopic (d18O) composition of planktonic foraminifera shows millennial-scale variability in all three intervals, with similar characteristics (duration, cyclicity) to those previously documented during MIS 3 at this site. Stadial G. bulloides d18O values are 2.75–1.75‰ (average 2.25‰) and interstadial values are 1.75–0.5‰ (average 1‰), with rapid (decadal-scale) interstadial and stadial initiations of 1-2‰, as in MIS 3. Interstadials lasted ~250–1600 years and occurred every ~650–1900 years. Stadial paleotemperatures were 3.5–9.5°C and interstadial paleotemperatures were 7.5–13°C. Upwelling, evidenced by planktonic foraminiferal assemblages and d13C, increased during interstadials, similar to MIS 3; high productivity during some stadials was reminiscent of the Last Glacial Maximum. This study builds upon previous records in showing that millennial-scale shifts were an inherent feature of Northern Hemisphere glacial climates since 735 ka, and they remained remarkably constant in the details of their amplitude, cyclicity, and temperature variability. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: OCE-0825322, OCE-0350573 #--------------------------------------- # Site Information # Site_Name: MV0508-11JPC # Location: Santa Barbara Basin # Country: USA # Northernmost_Latitude: 34.25 # Southernmost_Latitude: 34.25 # Easternmost_Longitude: -119.76 # Westernmost_Longitude: -119.76 # Elevation: -176.7 #--------------------------------------- # Data_Collection # Collection_Name: 11JPC U.pereg White13 # First_Year: 295000 # Last_Year: 290500 # Time_Unit: cal yr BP # Core_Length: 4.58 # Notes: Ages are approximate - see White et al 2013 and supplementary online info for details. Precision of U. peregrina is ±0.04‰ for C isotopes and ±0.06‰ for O isotopes (performed at UC Davis); precision of N. pachyderma and G. bulloides is ±0.09‰ for both isotopes (performed at UC Santa Barbara). Foraminifera counts based on sample splits of >300 specimens. #--------------------------------------- # Chronology_Information # Chronology: # Cores were recovered from a submarine anticline that exposes pre-modern strata. Individual cores were placed in a chronostratigraphic framework using seismic stratigraphy in conjunction with well logs and seafloor outcrops; ages were refined using oxygen isotope stratigraphy, biostratigraphic datums, and a radiometrically dated ash layer. The sedimentation rate was used to estimate the length of time captured by each core. See White et al 2013 (including supplementary online info) for details. #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## core_name core name,,,,,,,,C ## depth_top depth,,,cm,,,top of sample,,N ## d18Ou.pereg delta 18O,Uvigerina peregrina,,per mil PDB,,Paleoceanography,,isotope ratio mass spectrometry,N ## d13Cu.pereg delta 13C,Uvigerina peregrina,,per mil PDB,,Paleoceanography,,isotope ratio mass spectrometry,N #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NaN core_name depth_top d18Ou.pereg d13Cu.pereg 11JPC 5 3.37 -1.19 11JPC 15 3.12 -0.63 11JPC 20 3.31 -0.97 11JPC 25 3.18 -0.65 11JPC 30 3.23 -0.98 11JPC 35 3.24 -0.89 11JPC 40 3.24 -1.11 11JPC 45 3.19 -1.21 11JPC 55 3.05 -1.26 11JPC 60 3.12 -1.01 11JPC 65 2.92 -1.71 11JPC 70 2.92 -0.90 11JPC 75 3.19 -0.84 11JPC 85 3.11 -0.78 11JPC 90 2.99 -0.92 11JPC 95 2.93 -1.57 11JPC 105 3.03 -1.41 11JPC 140 3.22 -1.08 11JPC 155 3.07 -0.81 11JPC 165 2.88 -2.50 11JPC 170 3.07 -3.37 11JPC 190 2.78 -1.88 11JPC 195 2.77 -1.65 11JPC 200 3.06 -1.07 11JPC 205 3.05 -0.65 11JPC 210 3.11 -0.98 11JPC 215 3.07 -0.92 11JPC 225 2.82 -1.53 11JPC 245 2.83 -1.28 11JPC 250 2.92 -1.55 11JPC 255 2.93 -0.92 11JPC 260 3.14 -0.53 11JPC 265 2.99 -0.69 11JPC 275 3.01 -0.67 11JPC 280 2.66 -1.05 11JPC 315 2.48 -0.64 11JPC 320 2.85 -1.37 11JPC 325 2.94 -1.37 11JPC 330 3.09 -1.21 11JPC 335 2.97 -1.32 11JPC 340 2.76 -1.02 11JPC 345 2.71 -0.99 11JPC 350 2.77 -1.15 11HR 355 2.65 -1.28 11JPC 365 2.64 -1.16 11JPC 370 3.18 -2.20 11JPC 375 2.92 -2.08 11JPC 385 3.14 -2.50 11JPC 390 3.42 -2.16 11JPC 395 3.29 -1.96 11JPC 400 3.35 -1.98 11JPC 405 3.41 -1.89 11JPC 410 3.37 -1.97 11JPC 415 3.62 -2.00 11JPC 420 3.77 -1.98 11JPC 425 3.86 -1.81 11JPC 430 3.81 -1.93 11JPC 435 3.80 -1.79 11JPC 440 3.75 -1.74 11JPC 445 3.67 -1.60 11JPC 455 3.60 -1.75