# Florida Straits and Blake Ridge Stable Isotope Data over the last 35,000 years #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # 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/28372 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2019/lynch-stieglitz2019-73ggc-iso.txt # Description: NOAA location of the template # # Data_Type: Paleoceanography # # Dataset_DOI: # # Parameter_Keywords: oxygen isotopes, carbon isotopes #--------------------------------------- # Contribution_Date # Date: 2019-11-21 #--------------------------------------- # File_Last_Modified_Date # Date: 2019-11-21 #--------------------------------------- # Title # Study_Name: Florida Straits and Blake Ridge Stable Isotope Data over the last 35,000 years #--------------------------------------- # Investigators # Investigators: Lynch-Stieglitz, Jean; Schmidt, Matthew W.; Cleroux, Caroline; Valley, Shannon G. #--------------------------------------- # Description_Notes_and_Keywords # Description: # Provided Keywords: planktonic foraminifera, benthic foraminifera, G. truncatulinoides, Blake Ridge, Florida Straits #--------------------------------------- # Publication # Authors: Lynch-Stieglitz, J., S.G. Valley, and M.W. Schmidt # Published_Date_or_Year: 2019 # Published_Title: Temperature-dependent ocean-atmosphere equilibration of carbon isotopes in surface and intermediate waters over the deglaciation # Journal_Name: Earth and Planetary Science Letters # Volume: 506 # Edition: # Issue: # Pages: 466-475 # Report_Number: # DOI: 10.1016/j.epsl.2018.11.024 # Online_Resource: # Full_Citation: # Abstract: High resolution and precise records of the carbon isotopic composition of atmospheric carbon dioxide from ice cores are now providing a valuable constraint on the origin of the rise in CO2 over the last deglaciation. Previous studies using isotopic measurements on the tests of planktonic foraminifera from marine sediments had shown a deglacial minimum in the carbon isotopic composition of seawater carbon in the surface and thermocline waters of the Southern Hemisphere and the tropics, a feature also seen in the atmospheric record. Here we show that this deglacial minimum also can be clearly seen in carbon isotope measurements on planktonic foraminifera from sediment cores in the North Atlantic. There are also new high-resolution and precise records of the carbon isotopic composition of intermediate and mode waters generated using benthic foraminifera which show a history of change that is strikingly similar to that in the atmosphere. Similarities in these new highly-resolved deglacial records suggest that air-sea exchange can effectively globalize the isotopic signature of a release of carbon from the deep ocean. This limits the utility of carbon isotopes for constraining the precise location and mechanism of carbon release, indicating that more direct nutrient tracers are needed. However, given that the equilibrium partitioning of carbon isotopes between the atmosphere and ocean is temperature dependent, the difference between the atmosphere and upper ocean values could potentially provide an independent estimate of sea surface temperature change. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Science Foundation # Grant: OCE-0648258, OCE-0096472 #--------------------------------------- # Site_Information # Site_Name: KNR166-2-73GGC # Location: North Atlantic Ocean # Country: # Northernmost_Latitude: 23.75 # Southernmost_Latitude: 23.75 # Easternmost_Longitude: -79.433333 # Westernmost_Longitude: -79.433333 # Elevation: -542 #--------------------------------------- # Data_Collection # Collection_Name: KNR166-2-73GGC stable iso Lynch-Stieglitz2019 # First_Year: # Last_Year: # Time_Unit: # Core_Length: 2.48 # Notes: #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # 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_cm depth,,,centimeter,,paleoceanography,,,N,Depth in core ## d13C_G.trunc delta 13C,Globorotalia truncatulinoides,,per mil PDB,,paleoceanography,,,N,individual specimen 425-500 micron sieve size ## d18O_G.trunc delta 18O,Globorotalia truncatulinoides,,per mil PDB,,paleoceanography,,,N,individual specimen 425-500 micron sieve size ## coiling_dir notes,,,,,paleoceanography,,,C,coiling direction if known #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: NA depth_cm d13C_G.trunc d18O_G.trunc coiling_dir 0.25 0.89 0.00 R 0.25 1.21 0.18 R 0.25 1.24 -0.23 R 0.25 1.01 -0.05 R 4.25 0.62 -0.87 R 8.25 1.17 0.82 NA 8.25 1.36 0.40 R 8.25 1.05 0.01 R 8.25 1.43 0.63 R 12.25 1.37 0.05 R 16.25 1.46 0.44 R 16.25 0.81 -0.01 R 16.25 1.31 0.22 R 20.25 1.32 0.36 R 24.25 1.29 0.09 NA 24.25 1.23 0.07 R 28.25 1.50 0.64 NA 32.25 1.44 0.27 NA 32.25 1.27 0.08 R 32.25 1.40 0.23 R 32.25 1.29 -0.01 R 36.25 1.41 0.22 NA 40.25 0.83 -0.11 NA 40.25 1.29 0.32 R 40.25 1.25 -0.01 R 40.25 1.07 0.00 L 44.25 1.53 0.64 NA 48.25 1.23 -0.20 NA 48.25 1.38 0.25 R 52.25 1.30 0.27 NA 56.25 1.13 -0.18 NA 60.25 1.65 0.04 NA 64.25 1.04 0.01 NA 68.25 0.91 -0.92 NA 72.25 1.59 -0.05 NA 72.25 1.48 0.16 L 76.25 1.08 -0.34 NA 80.25 1.41 0.51 NA 80.25 1.54 0.19 R 80.25 1.31 0.20 L 80.25 1.50 0.48 L 84.25 1.21 0.30 R 88.25 0.56 -0.70 NA 92.25 1.49 0.45 NA 96.25 1.60 0.24 NA 100.25 1.31 0.16 NA 104.25 1.38 0.58 NA 104.25 1.37 0.09 L 104.25 1.09 -0.15 L 104.25 1.20 -0.09 R 108.25 1.33 0.16 NA 112.25 1.21 0.47 NA 112.25 1.52 0.18 R 112.25 1.42 0.27 L 116.25 1.40 0.30 NA 120.25 1.58 0.76 NA 120.25 0.63 -0.11 R 124.25 1.32 0.45 NA 128.25 1.33 0.67 NA 128.25 1.24 0.51 NA 128.25 1.01 -0.34 NA 128.26 1.13 0.21 NA 132.25 1.23 0.39 NA 132.25 1.21 0.29 NA 132.25 1.32 0.53 NA 132.25 1.19 0.54 NA 136.25 1.47 0.14 NA 136.25 1.19 -0.12 NA 136.25 1.22 0.33 NA 140.25 1.30 0.11 NA 140.25 1.47 0.87 NA 140.25 1.31 0.23 NA 144.25 1.62 0.69 NA 144.25 1.11 -0.31 NA 144.25 1.03 -0.07 NA 148.25 0.93 -0.47 NA 152.25 1.23 0.28 NA 152.25 1.40 0.34 NA 152.25 1.23 0.32 NA 156.25 1.18 -0.21 NA 156.25 1.49 0.13 NA 156.25 1.37 0.21 NA 160.25 1.30 0.08 NA 164.25 1.10 0.41 NA 164.25 1.27 0.43 NA 168.25 0.98 0.44 NA 172.25 0.94 0.28 L 172.25 0.78 -0.44 L 176.25 1.37 0.69 NA 180.25 1.07 -0.19 NA 184.25 1.28 0.57 NA 184.25 1.47 0.50 NA 184.25 0.66 -0.01 NA 188.25 1.10 0.45 NA 188.25 1.11 0.13 NA 188.25 1.26 0.64 NA 192.25 1.10 0.43 NA 192.25 1.58 1.69 NA 192.25 1.01 -0.08 NA 196.25 1.17 0.70 NA 196.25 1.14 0.25 NA 196.25 0.91 0.82 NA 200.25 1.70 1.92 NA 200.25 0.71 1.01 NA 200.25 0.92 0.03 NA 202.25 0.92 0.33 NA 202.25 1.34 1.68 NA 202.25 0.93 0.62 NA 204.25 1.62 1.39 NA 204.25 1.22 0.41 NA 204.25 1.62 1.73 NA 206.25 0.97 0.00 NA 206.25 1.10 1.04 NA 206.25 1.00 0.40 NA 208.25 1.48 1.50 NA 208.25 1.33 1.47 NA 208.25 0.90 0.24 NA 210.25 1.01 0.37 R 210.25 0.57 0.42 NA 210.25 0.83 0.12 NA 212.25 0.91 0.37 NA 212.25 1.09 0.32 NA 212.25 1.09 1.16 NA 214.25 1.02 0.77 NA 214.25 1.49 1.75 NA 214.25 0.75 1.42 NA 216.25 0.95 0.47 NA 216.25 1.20 1.07 NA 216.25 1.36 1.71 NA 218.25 0.75 0.06 L 218.25 1.29 0.86 NA 218.25 1.29 1.32 NA 220.25 0.85 0.37 R 220.25 1.53 1.75 R 220.25 1.43 1.67 NA 224.25 0.95 0.78 R 224.25 1.95 2.28 R 224.25 0.96 0.90 L 228.25 1.45 1.44 R 228.25 1.64 1.64 R 228.25 1.53 1.72 L 232.25 1.69 1.53 R 232.25 1.39 1.51 L 236.25 1.63 1.74 R 236.25 1.57 1.95 R 236.25 1.59 1.26 L 240.25 1.16 1.43 R 240.25 1.81 2.15 R 240.25 1.57 1.69 R 244.25 1.91 2.10 R 244.25 1.38 1.27 R 244.25 1.40 1.46 R 248.25 1.40 1.27 R 248.25 1.76 1.50 R 248.25 1.38 1.47 R