# 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/white2013-20jpc-uvig.txt # # Archive: Paleoceanography # # Parameter_Keywords: oxygen isotopes, carbon isotopes, population abundance, reconstruction #--------------------------------------- # 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: MV0508-20JPC # Location: Santa Barbara Basin # Country: USA # Northernmost_Latitude: 34.22 # Southernmost_Latitude: 34.22 # Easternmost_Longitude: -119.67 # Westernmost_Longitude: -119.67 # Elevation: 128.5 #--------------------------------------- # Data_Collection # Collection_Name: 20JPC U.pereg White13 # First_Year: 737000 # Last_Year: 733000 # Time_Unit: cal yr BP # Core_Length: 3.87 # 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 ## 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: core_name depth_top d18Ou.pereg d13Cu.pereg 20JPC 5 3.62 -1.495 20JPC 10 3.635 -1.035 20JPC 15 3.678 -1.209 20JPC 20 3.579 -1.314 20JPC 45 3.627 -1.052 20JPC 50 3.645 -1.316 20JPC 55 3.615 -1.454 20JPC 60 3.637 -1.392 20JPC 65 3.656 -1.251 20JPC 70 3.6 -1.451 20JPC 75 3.75 -1.15 20JPC 85 3.604 -1.467 20JPC 90 3.494 -1.485 20JPC 95 3.602 -1.524 20JPC 100 3.484 -1.651 20JPC 115 3.492 -2.061 20JPC 120 3.495 -2.332 20JPC 125 3.547 -1.241 20JPC 135 3.596 -1.816 20JPC 140 3.592 -1.619 20JPC 145 3.746 -1.288 20JPC 150 3.544 -1.173 20JPC 155 3.606 -1.624 20JPC 160 3.725 -2.613 20JPC 162 3.637 -1.607 20JPC 163 3.602 -1.396 20JPC 164 3.745 -1.196 20JPC 165 3.609 -1.252 20JPC 167 3.751 -1.206 20JPC 168 3.653 -1.156 20JPC 169 3.552 -2.043 20JPC 170 3.649 -1.394 20JPC 172 3.558 -1.826 20JPC 173 3.578 -1.982 20JPC 174 3.551 -1.857 20JPC 175 3.528 -2.273 20JPC 177 3.583 -2.121 20JPC 178 3.652 -1.537 20JPC 179 3.568 -1.708 20JPC 180 3.637 -1.859 20JPC 182 3.5 -1.871 20JPC 183 3.494 -1.941 20JPC 184 3.568 -2.216 20JPC 185 3.641 -1.725 20JPC 187 3.494 -1.445 20JPC 188 3.53 -1.547 20JPC 190 3.555 -1.698 20JPC 191 3.514 -1.319 20JPC 192 3.454 -1.406 20JPC 193 3.526 -1.516 20JPC 194 3.495 -1.387 20JPC 195 3.567 -1.531 20JPC 197 3.482 -1.445 20JPC 198 3.522 -1.327 20JPC 199 3.486 -1.552 20JPC 200 3.553 -1.38 20JPC 202 3.553 -1.342 20JPC 203 3.467 -1.396 20JPC 204 3.578 -1.249 20JPC 205 3.501 -1.596 20JPC 207 3.369 -2.003 20JPC 208 3.587 -1.672 20JPC 209 3.458 -1.608 20JPC 210 3.391 -1.868 20JPC 212 3.653 -1.701 20JPC 213 3.631 -1.886 20JPC 215 3.463 -1.719 20JPC 217 3.605 -1.64 20JPC 218 3.061 -2.062 20JPC 219 3.66 -1.767 20JPC 220 3.537 -2.09 20JPC 222 3.344 -1.991 20JPC 223 3.422 -1.895 20JPC 224 3.515 -1.965 20JPC 225 3.539 -1.597 20JPC 228 3.677 -1.785 20JPC 229 3.496 -2.318 20JPC 230 3.386 -2.844 20JPC 232 3.562 -2.513 20JPC 233 3.481 -1.743 20JPC 234 3.524 -2.333 20JPC 235 3.551 -1.715 20JPC 237 3.621 -1.556 20JPC 238 3.596 -1.468 20JPC 239 3.623 -1.728 20JPC 240 3.467 -1.683 20JPC 241 3.397 -2.177 20JPC 242 3.646 -1.688 20JPC 243 3.643 -1.446 20JPC 244 3.631 -1.588 20JPC 245 3.656 -1.837 20JPC 247 3.702 -1.458 20JPC 248 3.633 -2.274 20JPC 249 3.656 -1.588 20JPC 250 3.76 -1.336 20JPC 265 3.635 -2.117 20JPC 270 3.55 -1.365 20JPC 275 3.625 -1.569 20JPC 280 3.561 -1.091 20JPC 285 3.482 -1.552 20JPC 295 3.519 -1.532 20JPC 300 3.537 -1.429 20JPC 305 3.514 -1.543 20JPC 315 3.579 -1.644 20JPC 320 3.45 -2.129 20JPC 325 3.554 -1.361 20JPC 330 3.478 -1.697 20JPC 335 3.488 -1.842 20JPC 340 3.517 -1.796 20JPC 350 3.512 -0.933 20JPC 355 3.538 -1.697 20JPC 360 3.642 -1.217 20JPC 365 3.517 -1.193 20JPC 375 3.56 -1.12 20JPC 380 3.551 -1.134 20JPC 385 3.54 -0.932