# 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/white2013-16jpc-pachy.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; Hill, Tessa; Kennett, James; Behl, Richard; 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: MV0508-16JPC # Location: Santa Barbara Basin # Country: USA # Northernmost_Latitude: 34.25 # Southernmost_Latitude: 34.25 # Easternmost_Longitude: -119.77 # Westernmost_Longitude: -119.77 # Elevation: -191 #--------------------------------------- # Data_Collection # Collection_Name: 16JPC Npachy-s White13 # First_Year: 452500 # Last_Year: 448500 # Time_Unit: cal yr BP # Core_Length: 460 cm # Notes: Ages are approximate - see White et al 2013 and supplementary online info for details. Precision of N. pachyderma is ±0.04‰ for C isotopes and ±0.06‰ for O isotopes (performed at UC Davis); precision of U. peregrina 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 ## d18On.pachy-l delta 18O,Neogloboquadrina pachyderma left coiling,,per mil PDB,,Paleoceanography,,isotope ratio mass spectrometry,N ## d13Cn.pachy-l delta 13C,Neogloboquadrina pachyderma left coiling,,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 d18On.pachy-l d13Cn.pachy-l 16JPC 4 2.33 -1.30 16JPC 14 2.57 -1.22 16JPC 19 2.48 -1.53 16JPC 24 2.39 -1.63 16JPC 29 2.31 -1.24 16JPC 34 2.14 -1.84 16JPC 39 2.04 -1.70 16JPC 44 2.12 -1.84 16JPC 49.6 2.36 -1.84 16JPC 54 2.13 -1.72 16JPC 64 1.98 -1.70 16JPC 69 1.78 -2.05 16JPC 74 1.78 -1.65 16JPC 85 1.49 -1.00 16JPC 90 1.57 -1.23 16JPC 95 1.74 -2.89 16JPC 100 1.64 -2.30 16JPC 105 1.98 -2.69 16JPC 110 1.63 -1.86 16JPC 120 1.75 -1.23 16JPC 125 1.83 -1.06 16JPC 130 1.46 -1.02 16JPC 135 1.83 -1.52 16JPC 140 1.73 -1.19 16JPC 145 1.94 -0.99 16JPC 150 1.70 -0.74 16JPC 155 1.77 -1.15 16JPC 165 1.50 -1.32 16JPC 170 1.60 -1.07 16JPC 175 1.47 -0.99 16JPC 180 1.51 -0.75 16JPC 185 1.68 -1.73 16JPC 190 1.63 -1.48 16JPC 195 1.91 -1.49 16JPC 200 2.23 -1.29 16JPC 205 2.17 -1.64 16JPC 215 2.19 -1.23 16JPC 220 2.12 -1.28 16JPC 225 2.00 -0.93 16JPC 230 1.91 -1.12 16JPC 240 2.05 -1.15 16JPC 245 1.96 -1.51 16JPC 255 2.13 -0.18 16JPC 265 1.37 -0.56 16JPC 270 1.38 -0.57 16JPC 275 1.82 -0.41 16JPC 280 2.06 -0.46 16JPC 285 1.93 -0.45 16JPC 295 1.84 -1.71 16JPC 300 1.30 -0.35