# Neodymium Isotope Data from the Western Flank of the Sicily Channel since the Last Deglaciation (13,900 BP) #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded 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/37726 # 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-37726.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/na8p-pt57 # # Science_Keywords: Younger Dryas, hydrology, Interglacial, Last Interglacial #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/contributions_by_author/trias2023/trias2023-ndt-6-2016.txt # Data_Download_Description: NOAA Template File; Neodymium Isotope Data # #--------------------------------------- # Contribution_Date # Date: 2023-03-22 #--------------------------------------- # File_Last_Modified_Date # Date: 2023-05-06 #--------------------------------------- # Title # Study_Name: Neodymium Isotope Data from the Western Flank of the Sicily Channel since the Last Deglaciation (13,900 BP) #--------------------------------------- # Investigators # Investigators: Trias-Navarro, Sergio (https://orcid.org/0000-0002-1191-089X); Pena, Leopoldo David; de la Fuente, Maria; Paredes, Eduardo; Garcia-Solsona, Ester; Frigola, Jaime; Català, Albert; Caruso, Antonio; Lirer, Fabrizio; Haghipour, Negar; Pérez-Asensio, José Noel; Cacho, Isabel. #--------------------------------------- # Description_Notes_and_Keywords # Description: Neodymium records from planktic foraminifera coatings from NDT-6-2016 sediment core; Neodymium record from lithogenic <63 µm fraction from NDT-6-2016 sediment core; Eastern Mediterranean Source Waters (EMSW) estimations (EMSW_mix) with different mixing proportions between the eastern Mediterranean water masses contributing to the EMSW (LIW and EMDW) based on neodymium values from our record (NDT-6-2016) and SU92-33 (Balearic Sea), BC07 (Levantine Sea) and MS27PT (Nile slope). The first scenario is defined by the same relative contribution of LIW and EMDW (i.e. ??LIW =??EMDW), the second scenario the contribution of the LIW doubles that of the EMDW (i.e. ??LIW = 2*??EMDW) and the third scenario considers that the proportion of EMDW doubles that of the LIW (i.e. ??EMDW = 2*??LIW). #--------------------------------------- # Publication # Authors: Sergio Trias-Navarro, Leopoldo David Pena, Maria de la Fuente, Eduardo Paredes, Ester Garcia-Solsona, Jaime Frigola, Albert Català, Antonio Caruso, Fabrizio Lirer, Negar Haghipour, José Noel Pérez-Asensio, and Isabel Cacho # Published_Date_or_Year: 2023-04-29 # Published_Title: Eastern Mediterranean water outflow during the Younger Dryas was twice that of the present day # Journal_Name: Communications Earth & Environment # Volume: 4 # Edition: # Issue: # Pages: # Report_Number: 147 # DOI: 10.1038/s43247-023-00812-7 # Online_Resource: # Full_Citation: # Abstract: Eastern Mediterranean deep-intermediate convection was highly sensitive to varying inputs of fresh water fluxes associated with increased rainfall during the African Humid period (15-6 kyr Before Present). Here we investigate changes in the water-outflow from the Eastern Mediterranean Sea since the last deglaciation using neodymium isotope ratios. Our results indicate enhanced outflow during the Younger Dryas, two times higher than present-day outflow and about three times higher than during the last Sapropel. We propose that the increased outflow into the western Mediterranean over the Younger Dryas was the result of the combined effect of 1) enhanced climate-driven convection in the Aegean Sea and 2) reduced convection of western deep water during this period. Our results provide solid evidence for an enhanced Younger Dryas westward flow of Eastern Mediterranean sourced waters in consonance with an intensification of Mediterranean water-outflow during a weakened state of the Atlantic circulation. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: TIMED (ERC) # Grant: 683237 #--------------------------------------- # Site_Information # Site_Name: NDT-6-2016 # Location: Mediterranean Sea # Northernmost_Latitude: 38.007222 # Southernmost_Latitude: 38.007222 # Easternmost_Longitude: 11.795556 # Westernmost_Longitude: 11.795556 # Elevation_m: -1066 #--------------------------------------- # Data_Collection # Collection_Name: NDT-6-2016_trias2023 # First_Year: 13900 # Last_Year: 0 # Time_Unit: calendar year before present # Core_Length_m: 4.14 # Parameter_Keywords: geochemistry, radiogenic isotope, reconstruction # Notes: #--------------------------------------- # Chronology_Information # Chronology: # #--------------------------------------- # 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) # ## Depth_cm depth,,,centimeter,,Paleoceanography,,,N, ## Age_BP age,,,calendar kiloyear before present,,Paleoceanography,,,N, ## eNd_foram epsilon neodymium,planktic foraminifer,,epsilon unit,,Paleoceanography,,,N,epsilon neodymium (foraminiferal coatings) ## eNd_foram_err epsilon neodymium,planktic foraminifer,two standard deviations,epsilon unit,,Paleoceanography,,,N,epsilon neodymium ## eNd_0 epsilon neodymium,dry sediment,,epsilon unit,,Paleoceanography,,,N,epsilon neodymium ## eNd_0_err epsilon neodymium,dry sediment,two standard deviations,epsilon unit,,Paleoceanography,,,N,epsilon neodymium ## EMSW_Mix1 Eastern Mediterranean Sea Water,,,percent,,Paleoceanography,,,N,mixing ratio Scenario 1 ## EMSW_Mix1_err Eastern Mediterranean Sea Water,,two standard deviations,percent,,Paleoceanography,,,N,mixing ratio Scenario 1 ## EMSW_Mix2 Eastern Mediterranean Sea Water,,,percent,,Paleoceanography,,,N,mixing ratio Scenario 2 ## EMSW_Mix2_err Eastern Mediterranean Sea Water,,two standard deviations,percent,,Paleoceanography,,,N,mixing ratio Scenario 2 ## EMSW_Mix3 Eastern Mediterranean Sea Water,,,percent,,Paleoceanography,,,N,mixing ratio Scenario 3 ## EMSW_Mix3_err Eastern Mediterranean Sea Water,,two standard deviations,percent,,Paleoceanography,,,N,mixing ratio Scenario 3 #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: -999 Depth_cm Age_BP eNd_foram eNd_foram_err eNd_0 eNd_0_err EMSW_Mix1 EMSW_Mix1_err EMSW_Mix2 EMSW_Mix2_err EMSW_Mix3 EMSW_Mix3_err 0 0.0 -999 -999 -999 -999 25.2 10.9 26.2 11.2 24.3 11.5 11 0.4 -7.9 0.3 -999 -999 -999 -999 -999 -999 -999 -999 31 1.4 -8.1 0.3 -999 -999 -999 -999 -999 -999 -999 -999 51 2.4 -8.1 0.3 -12.1 0.2 16.1 13.6 15.9 13.2 16.3 12.8 71 3.3 -7.7 0.3 -999 -999 10.7 5.1 8.8 4.1 13.8 3.4 81 3.7 -7.6 0.3 -999 -999 33.6 11.1 32.8 10.9 34.5 10.8 91 4.2 -7.6 0.3 -999 -999 29.8 10.6 29.7 10.7 29.8 10.5 101 4.7 -8.2 0.3 -999 -999 16.8 7.9 16.5 7.9 17.1 7.7 111 5.2 -7.8 0.3 -999 -999 26.8 7.1 25.8 6.9 27.9 6.8 121 5.7 -7.6 0.3 -999 -999 28.8 7.4 28.1 7.2 29.4 7.3 123 5.9 -8.0 0.3 -999 -999 20.6 7.1 20.2 7.0 21.0 7.1 129 6.2 -7.5 0.3 -999 -999 28.0 7.1 27.1 6.9 29.1 6.8 138 6.6 -7.3 0.3 -999 -999 31.3 8.0 29.5 7.5 33.2 7.3 144 7.1 -7.5 0.3 -999 -999 27.6 8.6 25.2 7.8 30.4 7.2 147 7.5 -7.8 0.3 -999 -999 17.2 9.9 15.7 9.0 19.2 8.3 148 7.6 -8.4 0.3 -999 -999 4.0 9.2 3.7 8.4 4.5 7.7 151 7.9 -7.9 0.3 -999 -999 14.9 9.6 13.7 8.7 16.7 8.0 153 8.2 -8.1 0.3 -999 -999 10.6 9.4 9.8 8.3 11.6 7.6 154 8.4 -8.2 0.3 -999 -999 14.3 8.5 13.1 8.0 15.7 7.3 158 9.1 -8.4 0.3 -11.7 0.2 14.6 7.7 13.4 7.0 16.1 6.5 159 9.2 -7.8 0.3 -999 -999 22.6 8.0 20.3 7.2 25.4 6.6 161 9.6 -7.8 0.3 -999 -999 20.8 7.1 19.4 6.5 22.6 6.1 163 9.7 -8.3 0.4 -999 -999 10.7 7.5 10.2 7.1 11.3 6.8 179 10.3 -7.9 0.5 -999 -999 23.7 9.2 22.2 8.8 25.1 8.3 197 10.6 -8.0 0.4 -999 -999 17.9 8.4 16.8 7.9 19.4 7.3 211 10.8 -7.4 0.6 -999 -999 25.8 12.2 24.3 11.5 27.4 10.8 223 11.0 -7.2 0.4 -999 -999 30.3 9.6 28.3 9.1 32.8 8.5 243 11.3 -7.1 0.4 -12.0 0.2 39.0 8.7 36.5 8.2 41.7 7.8 247 11.4 -7.3 0.4 -999 -999 34.8 7.8 33.0 7.4 37.1 7.2 261 11.6 -7.0 0.4 -999 -999 34.8 8.4 32.7 7.8 37.3 7.5 280 11.9 -6.3 0.3 -999 -999 51.8 8.3 49.6 8.0 53.9 7.8 301 12.2 -5.8 0.5 -999 -999 60.8 11.8 58.0 11.1 63.7 10.9 321 12.6 -5.6 0.4 -11.6 0.2 59.1 10.2 56.1 9.7 62.3 9.4 349 13.1 -7.7 0.4 -999 -999 22.8 8.8 21.8 8.4 23.8 8.2 361 13.3 -8.1 0.4 -11.9 0.2 18.1 7.8 17.6 7.6 18.9 7.5 381 13.9 -7.5 0.4 -999 -999 27.0 8.7 26.5 8.4 28.0 8.3