# Bay of Plenty, New Zealand Deglacial Planktonic Stable Isotope Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 2.0 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/20365 # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schiraldi2014/schiraldi2014jpc64.txt # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleoceanography # # Parameter_Keywords: oxygen isotopes, carbon isotopes #-------------------- # Contribution_Date # Date: 2016-08-01 #-------------------- # File_Last_Modified_Date # Date: 2018-03-21 #-------------------- # Title # Study_Name: Bay of Plenty, New Zealand Deglacial Planktonic Stable Isotope Data #-------------------- # Investigators # Investigators: Schiraldi, B., Jr.; Sikes, E.L.; Elmore, A.C.; Cook, M.S.; Rose, K.A. #-------------------- # Description_and_Notes # Description: Stable isotope (d18O and d13C) from planktonic foraminifera (G. inflata and G. bulloides) in 4 sediment cores collected in the Bay of Plenty, # New Zealand for the deglacial interval (~30 - 5 KYrBP). # Note: This file corrected 21 March 2018. Age/Depth/Isotope data columns were misaligned in the original version due to improper handling of missing values. # Provided Keywords: last deglaciation, Lact Glacial maximum, Southern Ocean #-------------------- # Publication # Authors: Benedetto Schiraldi Jr., Elisabeth L. Sikes, Aurora C. Elmore, Mea S. Cook, Kathryn A. Rose # Published_Date_or_Year: 2014-06-17 # Published_Title: Southwest Pacific subtropics responded to last deglacial warming with changes in shallow water sources # Journal_Name: Paleoceanography # Volume: 29 # Edition: # Issue: 6 # Pages: 595-611 # Report_Number: # DOI: 10.1002/2013PA002584 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1002/2013PA002584/full # Full_Citation: # Abstract: This study examined sources of mixed layer and shallow subsurface waters in the subtropical Bay of Plenty, New Zealand, across the last deglaciation (~30-5 ka). d18O and d13C from planktonic foraminifera Globgerinoides bulloides and Globorotalia inflata in four sediment cores were used to reconstruct surface mixed layer thickness, d18O of seawater (d18OSW) and differentiate between high- and low-latitude water provenance. During the last glaciation, depleted planktonic d18OSW and enriched d13C (-0.4-0.1 per mil) indicate surface waters had Southern Ocean sources. A rapid d13C depletion of ~1 per mil in G. bulloides between 20 and 19 ka indicates an early, permanent shift in source to a more distal tropical component, likely with an equatorial Pacific contribution that persisted into the Holocene. At 18 ka, a smaller but similar shift in G. inflata d13C depletion of ~0.3 per mil suggests that deeper subsurface waters had a delayed reaction to changing conditions during the deglaciation. This contrasts with the isotopic records from nearby Hawke Bay, to the east of the North Island of New Zealand, which exhibited several changes in thermocline depth indicating switches between distal subtropical and proximal subantarctic influences during the early deglaciation ending only after the Antarctic Cold Reversal. Our results identify the midlatitude subtropics, such as the area around the North Island of New Zealand, as a key region to decipher high- versus low-latitude influences in Southern Hemisphere shallow water masses. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: OCE-0823487, 0823549-03 #------------------ # Site_Information # Site_Name: RR0503-64-JPC # Location: Ocean>Pacific Ocean>South Pacific Ocean # Country: # Northernmost_Latitude: -37.4223 # Southernmost_Latitude: -37.4223 # Easternmost_Longitude: 177.0023 # Westernmost_Longitude: 177.0023 # Elevation: -651 m #------------------ # Data_Collection # Collection_Name: Schiraldi2014JPC64 # Earliest_Year: 20430 # Most_Recent_Year: 13720 # Time_Unit: Cal. Year BP # Core_Length: 1.094m # Notes: #------------------ # Chronology_Information # Chronology: # Tephrostratigraphic Tie Points Used in the Development of Age Models # # Tephra Age (ka) 64JPC 79JPC 87JPC 125JPC # Tuhua 6.95 32cm # Rotoma 9.42 87cm 46cm # Waiohau 13.75 89cm 81cm # Rerewhakaaitu 17.85 153cm 187cm 74cm 164cm # Okareka 21.86 307cm 199cm 282cm # # Te Rere 25.17 372cm 289cm # Kawkawa 25.358 330cm 157cm 346cm # # Ages for the tephras are from Lowe et al. [2013]. In core 64 JPC, the Rotoma tephra directly overlies the Waiohau indicating a hiatus of ~4 ka [Rose et al., 2010] # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## depth_cm depth, , , cm, , , , ,N ## age_calBP age, , , calendar kyears before present, , , , ,N ## d13Cg.infla delta C13, Globorotalia inflata, , per mil PDB, , paleoceanography, , ,N ## d18Og.infla delta O18, Globorotalia inflata, , per mil PDB, , paleoceanography, , ,N ## d13Cg.bull delta C13, Globigerina bulloides, , per mil PDB, , paleoceanography, , ,N ## d18Og.bull delta O18, Globigerina bulloides, , per mil PDB, , paleoceanography, , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # depth_cm age_calkaBP d13Cg.infla d18Og.infla d13Cg.bull d18Og.bull 92.5 13.909 0.403025 1.34724 -1.6 0.67 93.5 13.985 0.506974 1.40873 -1.61 0.86 100.5 14.514 0.534524 1.42874 -1.39 0.91 103.5 14.741 0.493001 1.56548 -1.37 1.16 107.5 15.043 0.485624 1.50343 -1.28 1.3 110.5 15.27 0.55413 1.84727 -1.36 1.14 114.5 15.572 0.641766 1.86061 -1.05 1.29 116.5 15.724 0.556865 1.58569 -1.22 1.2 120.5 16.026 0.452279 1.66036 -1.36 1.21 123.5 16.253 0.53 1.87 -1.37 1.23 126.5 16.355 0.709335 1.78371 -1.46 1.12 128.5 16.474 0.533627 1.66978 -1.53 1.21 130.5 16.563 0.723832 1.84545 -1.58 1.19 132.5 16.651 0.661426 1.95406 -1.37 1.31 135.5 16.766 0.643471 1.91972 -1.32 1.44 138.5 16.88 0.613956 1.81352 -1.3 1.42 140.5 17.001 0.829187 2.10043 -1.45 1.39 142.5 17.122 0.687284 1.85129 -1.4 1.42 144.5 17.251 0.6 1.91 -0.97 1.49 145.5 17.316 0.686806 1.96365 -1.24 1.46 146.5 17.381 0.67 1.87 -1.04 1.42 147.5 17.445 0.73 1.96 -1.2 1.42 148.5 17.51 0.75 2.02 -0.86 1.52 149.5 17.542 0.67 1.95 -0.9 1.4 149 17.672 0.845 1.94 -1.51 1.42 151 17.769 0.645 1.84 -1.3 1.42 152.5 17.801 0.78 2.07 -1.2 1.36 153.5 17.824 0.81 2.04 -1.32 1.31 154.5 17.869 0.74 2.08 -1.25 1.45 156 17.937 0.715 1.93 -1.66 1.43 157.5 18.005 0.72 2.17 -1.08 1.42 158 18.028 -1.63 1.38 158.5 18.05 0.73 2.08 -1.02 1.52 159.5 18.095 0.8 1.93 -1.39 1.34 160.5 18.141 0.71 2 -1.03 1.61 161.5 18.186 0.754587 2.12368 -1.5 1.5 163.5 18.277 0.75 2.12 -0.71 1.81 164.5 18.322 0.749646 2.04218 -1.62 1.43 166.5 18.497 0.799725 2.13714 -1.35 1.58 168.5 18.671 0.784439 2.06929 -1.62 1.37 170.5 18.846 0.833303 2.2329 -1.78 1.45 171.5 18.886 0.78 2.1 -1.78 1.8 172.5 18.925 0.67 2.06 -0.95 2.03 174.5 19.004 0.68 2.13 -0.49 1.72 176.5 19.084 0.68 2.01 -1.2 1.63 178.5 19.163 0.77 2.03 -1.24 1.8 180.5 19.242 0.825851 2.17638 -0.94 1.57 181.5 19.282 0.79 2 -0.67 2.13 184.5 19.4 0.76 2.06 -0.98 1.78 188.5 19.559 0.79 1.94 -0.97 1.74 190.5 19.638 0.701518 2.04483 -1.42 1.42 191.5 19.678 0.76 1.97 -0.88 1.86 200.5 20.034 0.701488 2.21615 -1.45 1.45 210.5 20.43 0.750648 2.22279 -1.34 1.63