# Subtropical North Atlantic Radiocarbon Data during the Last Glaciation #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # 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, study title, NOAA Landing Page URL, and date accessed. # # Description/Documentation lines begin with '#' followed by a space # Data lines have no '#' # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/33352 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-ocean-33352.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Paleoceanography # # Dataset_DOI: 10.25921/tgh0-wx49 # # Science_Keywords: #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/hill2021/hill2021-02gc-c14.txt # Data_Download_Description: NOAA Template File; 02GC Radiocarbon Data # #--------------------------------------- # Contribution_Date # Date: 2021-05-07 #--------------------------------------- # File_Last_Modified_Date # Date: 2025-06-02 #--------------------------------------- # Title # Study_Name: Subtropical North Atlantic Radiocarbon Data during the Last Glaciation #--------------------------------------- # Investigators # Investigators: Hill, Jenna C. #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Condron, A. and Hill, J.C. # Published_Date_or_Year: 2021 # Published_Title: Timing of iceberg scours and massive ice-rafting events in the subtropical North Atlantic # Journal_Name: Nature Communications # Volume: 12 # Edition: # Issue: # Pages: # Report_Number: 3668 # DOI: 10.1038/s41467-021-23924-0 # Online_Resource: # Full_Citation: # Abstract: High resolution seafloor mapping shows extraordinary evidence that massive (>300 m thick) icebergs once drifted >5,000 km south along the eastern United States, with >700 iceberg scours now identified south of Cape Hatteras. Here we report on sediment cores collected from several buried scours that show multiple plow marks align with Heinrich Event 3 (H3), ~31,000 years ago. Numerical glacial iceberg simulations indicate that the transport of icebergs to these sites occurs during massive, but short-lived, periods of elevated meltwater discharge. Transport of icebergs to the subtropics, away from deep water formation sites, may explain why H3 was associated with only a modest increase in ice-rafting across the subpolar North Atlantic, and implies a complex relationship between freshwater forcing and climate change. Stratigraphy from subbottom data across the scour marks shows there are additional features that are both older and younger, and may align with other periods of elevated meltwater discharge. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: 1558994 #--------------------------------------- # Site_Information # Site_Name: SH1710-02GC # Location: North Atlantic Ocean # Northernmost_Latitude: 32.776568 # Southernmost_Latitude: 32.776568 # Easternmost_Longitude: -78.084367 # Westernmost_Longitude: -78.084367 # Elevation_m: -201.7 #--------------------------------------- # Data_Collection # Collection_Name: 02GC Radiocarbon Hill2021 # First_Year: 42300 # Last_Year: 24600 # Time_Unit: 14C yr BP # Core_Length_m: 2.483 # Parameter_Keywords: carbon isotopes, age control # Notes: #--------------------------------------- # Chronology_Information # Chronology: Radiocarbon # Chronology_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/templates/noaa-wds-paleo-14c-terms.csv # Chronology_Download_Description: Radiocarbon terms and definitions. # Chronology_Notes: # Rejection_Rationale: # Reservoir_Method: # Calibration_Method: OxCal 4.3 # Age_Model_Method: # Missing_Values: # Chronology_Table: # lab_code depth_end_cm depth_start_cm material_dated age_14C_BP1950 age_14C_1s_yr date_type calib_curve age_calib_pos2s_BP1950 age_calib_neg2s_BP1950 age_calib_BP1950 notes # SH1710-02GC-115 114.5 115.5 G. ruber 24600 150 14 AMS Marine13 28231 25922 27872 # SH1710-02GC-116 115.5 116.5 G. ruber 25900 170 14 AMS Marine13 29612 27181 29138 # SH1710-02GC-133 132.5 133.5 G. ruber 24000 140 14 AMS Marine13 27717 25532 27481 # SH1710-02GC-135 134.5 135.5 G. ruber 25100 160 14 AMS Marine13 28734 26408 28363 # SH1710-02GC-142 141.5 142.5 G. ruber 26500 180 14 AMS Marine13 30393 27851 29808 # SH1710-02GC-145 144.5 145.5 G. ruber 29000 250 14 AMS Marine13 32624 29802 31766 # SH1710-02GC-160 159.5 160.5 G. ruber 28500 130 14 AMS Marine13 31846 29498 31449 # SH1710-02GC-162 161.5 162.5 G. ruber 33400 230 14 AMS Marine13 37100 34423 36381 # SH1710-02GC-165 164.5 165.5 G. ruber 42300 2800 14 AMS Marine13 45896 39598 42765 #--------------------------------------- # Variables # PaST_Thesaurus_Download_Resource: https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data) # #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: Data is contained in the Chronology section above