# Paleo-pCO2 Database: Ceara Rise, Atlantic Ocean Boron Isotope Data from the Late Miocene #----------------------------------------------------------------------- # 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/37077 # 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-forcing-37077.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Climate Forcing # # Dataset_DOI: # # Science_Keywords: Atmospheric Gas Reconstruction, carbon cycle #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/boron_isotopes_brown_2022.txt # Data_Download_Description: NOAA Template File; Boron Isotope Data # #--------------------------------------- # Contribution_Date # Date: 2022-11-22 #--------------------------------------- # File_Last_Modified_Date # Date: 2023-06-13 #--------------------------------------- # Title # Study_Name: Paleo-pCO2 Database: Ceara Rise, Atlantic Ocean Boron Isotope Data from the Late Miocene #--------------------------------------- # Investigators # Investigators: Brown, Rachel M.; Chalk, Thomas B.; Crocker, Anya J.; Wilson, Paul A.; Foster, Gavin L. #--------------------------------------- # Description_Notes_and_Keywords # Description: Boron isotope compositions for planktic foraminifera to track carbon dioxide change for the late Miocene cooling event between 7 and 5 Ma. #--------------------------------------- # Publication # Authors: Brown, R.M., Chalk, T.B., Crocker, A.J., Wilson, P.A. and Foster, G.L. # Published_Date_or_Year: 2022 # Published_Title: Late Miocene cooling coupled to carbon dioxide with Pleistocene-like climate sensitivity # Journal_Name: Nature Geoscience # Volume: 15 # Edition: # Issue: 8 # Pages: 664-670 # Report_Number: # DOI: 10.1038/s41561-022-00982-7 # Online_Resource: # Full_Citation: # Abstract: Earth’s climate cooled markedly during the late Miocene from 12 to 5 million years ago, with far-reaching consequences for global ecosystems. However, the driving forces of these changes remain controversial. A major obstacle to progress is the uncertainty over the role played by greenhouse gas radiative forcing. Here we present boron isotope compositions for planktic foraminifera, which record carbon dioxide change for the interval of most rapid cooling, the late Miocene cooling event between 7 and 5 Ma. Our record suggests that CO2 declined by some 100 ppm over this two-million-year-long interval to a minimum at approximately 5.9 Ma. Having accounted for non-CO2 greenhouse gasses and slow climate feedbacks, we estimate global mean surface temperature change for a doubling of CO2—equilibrium climate sensitivity—to be 3.9 °C (1.8–6.7 °C at 95% confidence) on the basis of comparison of our record of radiative forcing from CO2 with a record of global mean surface temperature change. We conclude that changes in CO2 and climate were closely coupled during the latest Miocene and that equilibrium climate sen- sitivity was within range of estimates for the late Pleistocene, other intervals of the Cenozoic and the twenty-first century as presented by the Intergovernmental Panel on Climate Change. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Natural Environment Research Council (NERC)  # Grant: NE/P011381/1 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Leverhulme Trust  # Grant: NE/L002531/1  #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Royal Society # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Wolfson Merit Awards # Grant: #--------------------------------------- # Site_Information # Site_Name: Ceara Rise # Location: Atlantic Ocean # Northernmost_Latitude: 3.7212472 # Southernmost_Latitude: 3.7212472 # Easternmost_Longitude: -42.9132861111111 # Westernmost_Longitude: -42.9132861111111 # Elevation_m: -3598 #--------------------------------------- # Data_Collection # Collection_Name: ODP926_Brown2022 # First_Year: 7000000 # Last_Year: 5000000 # Time_Unit: calendar year before present # Core_Length_m: # Parameter_Keywords: carbon dioxide # Notes: Isotopic ratio of boron (d11B) of the surface-dwelling foraminifera Trilobatus trilobus (T. trilobus) to reconstruct surface ocean pH and atmospheric CO2 concentrations for the latest Miocene (7–5 Ma) #--------------------------------------- # 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) # #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: