# 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-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; 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 U.pereg 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 ## 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 16JPC 4 3.254 -1.168 16JPC 14 3.502 -1.594 16JPC 19 3.812 -1.636 16JPC 24 3.803 -2.1 16JPC 29 3.391 -2.159 16JPC 34 3.587 -2.092 16JPC 39 3.533 -1.507 16JPC 44 3.635 -1.894 16JPC 49.5 3.618 -1.955 16JPC 54 3.462 -1.575 16JPC 64 3.472 -1.67 16JPC 69 3.475 -1.656 16JPC 74 3.541 -1.555 16JPC 85 3.49 -1.259 16JPC 90 3.435 -1.738 16JPC 95 3.49 -1.608 16JPC 100 3.483 -1.976 16JPC 105 3.546 -1.441 16JPC 110 3.961 -3.24 16JPC 120 3.591 -1.714 16JPC 125 3.57 -1.349 16JPC 130 3.601 -1.024 16JPC 135 3.548 -1.46 16JPC 140 3.593 -1.629 16JPC 145 3.451 -1.716 16JPC 150 3.491 -1.316 16JPC 155 3.462 -1.26 16JPC 157 3.538 -1.286 16JPC 158 3.523 -1.066 16JPC 159 3.488 -1.338 16JPC 160 3.454 -1.321 16JPC 161 3.529 -1.372 16JPC 162 3.595 -1.214 16JPC 163 3.505 -1.231 16JPC 164 3.453 -1.252 16JPC 165 3.465 -1.304 16JPC 167 3.5 -1.486 16JPC 168 3.473 -1.431 16JPC 169 3.429 -1.5 16JPC 170 3.335 -1.663 16JPC 173 3.361 -1.352 16JPC 174 3.197 -1.605 16JPC 175 2.985 -1.028 16JPC 177 3.075 -1.517 16JPC 178 3.328 -1.503 16JPC 182 3.238 -1.541 16JPC 183 3.305 -1.537 16JPC 184 3.513 -1.191 16JPC 185 3.327 -1.438 16JPC 187 3.372 -1.584 16JPC 188 2.865 -1.761 16JPC 189 2.853 -1.413 16JPC 190 2.647 -1.328 16JPC 192 3.466 -1.474 16JPC 193 3.41 -1.443 16JPC 194 3.463 -1.393 16JPC 195 3.552 -2.366 16JPC 200 3.512 -1.895 16JPC 205 3.68 -1.888 16JPC 215 3.655 -1.522 16JPC 220 3.62 -1.752 16JPC 225 3.557 -1.279 16JPC 230 3.583 -1.372 16JPC 232 3.588 -1.305 16JPC 233 3.571 -1.402 16JPC 234 3.534 -1.342 16JPC 235 2.71 -0.626 16JPC 237 3.557 -1.225 16JPC 238 3.617 -1.186 16JPC 239 3.57 -1.271 16JPC 240 3.594 -1.293 16JPC 245 3.578 -1.282 16JPC 253 3.274 -1.271 16JPC 254 3.488 -1.013 16JPC 255 3.135 -1.22 16JPC 260 3.31 -1.182 16JPC 261 3.514 -1.123 16JPC 262 3.537 -0.99 16JPC 263 3.454 -1.06 16JPC 265 3.385 -1.452 16JPC 270 3.243 -1.334 16JPC 275 3.441 -1.29 16JPC 280 3.524 -1.364 16JPC 285 3.48 -1.288 16JPC 295 3.673 -1.899 16JPC 300 3.265 -1.26