# 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-assem.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 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: MV0508-20JPC # 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 assemblage 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) ## depth_top depth,,,cm,,,top of sample,,N ## foram-tot total number of foraminifera in sample,,,#,,,,,N ## %N.pachy-r/N.pachy-tot #N. pachyderma right coiling / (# N. pachyderma right coiling + # N. pachyderma left coiling),,,percent,,Paleoceanography,,,N ## N.pachy-l/cm3 Neogloboquadrina pachyderma left coiling,,,count/cm^3,,Paleoceanography,,,N ## N.pachy-r/cm3 Neogloboquadrina pachyderma right coiling,,,count/cm^3,,Paleoceanography,,,N ## G.bull/cm3 Globigerina bulloides,,,count/cm^3,,Paleoceanography,,,N ## T.quinq/cm3 Turborotalita quinqueloba,,,count/cm^3,,Paleoceanography,,,N ## warmforams/cm3 G. ruber + O. universa + N. dutertrei + G. inflata,,,count/cm^3,,Paleoceanography,,,N #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NaN depth_top foram-tot %N.pachy-r/N.pachy-tot N.pachy-l/cm3 N.pachy-r/cm3 G.bull/cm3 T.quinq/cm3 warmforams/cm3 5 1184 4 812 36 96 40 4 10 4860 10 2858 304 370 328 24 15 3007 2 1889 48 328 325 5 20 1059 5 561 32 131 70 6 25 2289 3 1342 37 275 219 5 35 2616 7 1385 104 293 96 0 40 380 3 257 9 18 8 0 45 2305 7 1448 104 161 88 0 50 868 14 451 72 66 45 3 55 836 17 467 93 31 67 0 60 3164 12 1952 272 156 144 0 65 2428 11 1562 186 143 32 13 70 1044 7 806 59 67 24 11 75 4078 5 2733 139 247 43 21 85 8480 13 5632 832 544 64 0 90 3150 14 1856 304 278 88 8 95 1476 7 875 64 125 72 0 100 2428 28 1196 466 430 108 12 105 1162 16 659 125 80 74 0 110 2272 15 1143 200 129 168 0 115 1963 31 757 341 94 76 0 120 2361 14 1330 224 271 184 0 125 7135 24 3501 1131 924 235 64 135 5863 9 4247 400 288 224 32 140 2302 6 1541 102 160 64 13 145 5683 8 3512 288 587 256 16 150 6943 6 4550 277 494 277 0 155 18804 5 12761 640 1755 896 128 160 5301 8 4098 363 318 117 11 165 6144 6 4589 299 424 192 43 170 4542 6 2748 47 148 58 0 175 2783 7 1934 146 227 91 9 180 2247 3 1556 51 154 96 6 185 2438 6 1523 104 347 56 8 195 7068 7 4780 341 751 192 0 200 3368 6 1945 128 549 64 0 205 3637 16 1883 352 474 75 0 210 3321 15 1599 277 623 139 11 215 2840 14 1303 208 761 112 8 220 2871 42 1008 736 647 40 8 225 2629 19 1006 240 543 40 8 230 2119 17 1227 250 297 38 0 235 1467 13 616 96 279 48 8 245 17303 2 12518 256 741 973 51 250 7022 1 5997 85 278 512 149 265 1557 4 1295 58 84 36 12 270 1910 3 1420 51 132 51 0 275 910 3 614 19 88 48 3 280 2120 5 1532 83 121 58 13 285 1628 2 1194 27 108 37 11 295 774 6 483 29 88 19 0 300 588 5 301 14 97 5 4 305 1175 9 447 44 332 88 8 315 892 4 289 13 304 24 0 320 918 8 280 26 357 86 0 325 2551 10 709 80 1162 120 0 330 1859 7 963 76 532 116 0 335 2095 10 607 64 714 237 0 340 2293 11 733 88 808 144 8 345 1913 12 452 64 718 218 0 350 686 4 443 21 77 75 2 355 170 6 125 8 25 7 0 360 417 7 322 23 25 3 1 375 5004 4 3940 160 312 208 0 380 4632 4 3459 160 485 112 16 385 3695 4 2774 128 270 203 21