# Vietnam Coral Radiocarbon Data from 1571-1950 CE #---------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #---------------------------------------------------- # 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 # # Data lines have no # # # NOAA_Landing_Page: https://www.ncei.noaa.gov/access/paleo-search/study/27650 # 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-coral-27650.json # Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata. # # Data_Type: Corals and Sclerosponges # # Dataset_DOI: 10.25921/d1ft-sb46 # # Science_Keywords: #-------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/south_china_sea/goodkin2019/goodkin2019-radiocarb-noaa.txt # Data_Download_Description: NOAA Template File; Hon Tre Radiocarbon Data # #-------------------- # Contribution_Date # Date: 2019-09-16 #-------------------- # File_Last_Modified_Date # Date: 2025-08-22 #-------------------- # Title # Study_Name: Vietnam Coral Radiocarbon Data from 1571-1950 CE #-------------------- # Investigators # Investigators: Goodkin, N.F.(https://orcid.org/0000-0001-9697-5520); Bolton, A.(https://orcid.org/0000-0002-7252-2049); Hughen, K.A.(https://orcid.org/0000-0003-3201-934X); Karnauskas, K.B.(https://orcid.org/0000-0001-8121-7321); Griffin, S.M.; Phan, H.K.; Vo, S.T.; Ong, M.R.K.(https://orcid.org/0000-0001-9271-4083); Druffel, E.R.M.(https://orcid.org/0000-0002-7139-1075) #-------------------- # Description_Notes_and_Keywords # Description: Provided Keywords: coral, radiocarbon, ocean circulation #-------------------- # Publication # Authors: Goodkin, N.F., Bolton, A., Hughen, K.A., Karnauskas, K.B., Griffin, S., Phan, K.H., Vo, S.T., Ong, M.R., and Druffel, E.R.M. # Journal_Name: Geophysical Research Letters # Published_Title: East Asian Monsoon Variability Since the Sixteenth Century # Published_Date_or_Year: 2019 # Volume: 46 # Issue: # Pages: 4790-4798 # Report_Number: # DOI: 10.1029/2019GL081939 # Full_Citation: # Abstract: The East Asian Monsoon (EAM) impacts storms, freshwater availability, wind energy production, coal consumption, and subsequent air quality for billions of people across Asia. Despite its importance, the EAM's long-term behavior is poorly understood. Here we present an annually resolved record of EAM variance from 1584 to 1950 based on radiocarbon content in a coral from the coast of Vietnam. The coral record reveals previously undocumented centennial scale changes in EAM variance during both the summer and winter seasons, with an overall decline from 1600 to the present. Such longterm variations in monsoon variance appear to reflect independent seasonal mechanisms that are a combination of changes in continental temperature, the strength of the Siberian High, and El Niño Southern Oscillation behavior. We conclude that the EAM is an important conduit for propagating climate signals from the tropics to higher latitudes. #-------------------- # Funding_Agency # Funding_Agency_Name: National Research Foundation Singapore # Grant: #-------------------- # Site_Information # Site_Name: Hòn Tre Island # Location: Vietnam # Northernmost_Latitude: 12.213861 # Southernmost_Latitude: 12.213861 # Easternmost_Longitude: 109.304864 # Westernmost_Longitude: 109.304864 # Elevation_m: -8 #-------------------- # Data_Collection # Collection_Name: Tho Nhat D14C Goodkin2019 # First_Year: 1571 # Last_Year: 1950 # Time_Unit: CE # Core_Length_m: # Parameter_Keywords: carbon isotopes # 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) # ## age_CE age,,,year Common Era,,corals and sclerosponges,,,N, ## d14-C-annual Delta 14C,Porites sp.,,per mil,annual,corals and sclerosponges,,accelerator mass spectrometry,N, ## d14-C-ocean Delta 14C,Porites sp.,,per mil,annual,corals and sclerosponges,anomalized,accelerator mass spectrometry,N,Anomaly from 100 year smooth ## summer_monsoon_index Delta 14C,Porites sp.,,per mil,,corals and sclerosponges,detrended;filtered,accelerator mass spectrometry,N,annual coral Delta 14C detrended by the coral 100-year smooth and filtered to frequencies of correlation to East Asian Summer monsoon wind stress (4.2-5 years); Cross Spectral Analysis to identify seasonal frequency then band-pass filtered ## winter_monsoon_index Delta 14C,Porites sp.,,per mil,,corals and sclerosponges,detrended;filtered,accelerator mass spectrometry,N,annual coral Delta 14C detrended by the coral 100-year smooth and filtered to frequencies of correlation to East Asian Winter Monsoon frequencies (2.3-2.5 years and 8-80 years); Cross Spectral Analysis to identify seasonal frequency then band-pass filtered #-------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: age_CE d14-C-annual d14-C-ocean summer_monsoon_index winter_monsoon_index 1950 -55.7 2.757 0.630732 -0.03512 1949 -60.49 -2.266 -0.2706 -0.9734 1948 -59.67 -1.675 -0.77776 -1.17963 1947 -60.46 -2.691 -0.0076 -0.78651 1946 -58.34 -0.793 0.811628 -0.91831 1945 -56.43 0.899 0.316897 0.562972 1944 -57.02 0.094 -0.71353 0.620422 1943 -54.1 2.803 -0.60301 1.299887 1942 -53.58 3.117 0.477508 1.31409 1941 -58.68 -2.186 0.790143 0.400796 1940 -55.56 0.736 -0.14848 0.455815 1939 -57.65 -1.548 -0.83005 -0.78112 1938 -57.73 -1.817 -0.20987 -0.72484 1937 -53.81 1.917 0.692738 -0.96417 1936 -57.2 -1.655 0.499708 -1.14957 1935 -56.49 -1.123 -0.41208 -0.38832 1934 -56.58 -1.388 -0.64624 -0.5877 1933 -54.36 0.661 0.055773 0.230277 1932 -53.54 1.314 0.597695 0.390701 1931 -52.32 2.371 0.263323 0.461839 1930 -55.42 -0.889 -0.37693 0.91678 1929 -54.1 0.274 -0.45204 0.482475 1928 -53.38 0.841 0.051836 0.804273 1927 -52.77 1.301 0.443853 0.555548 1926 -52.85 1.075 0.257611 0.277734 1925 -52.54 1.244 -0.25363 0.350454 1924 -54.03 -0.384 -0.4497 -0.33474 1923 -54.15 -0.637 -0.0534 -0.13627 1922 -53.1 0.283 0.451293 -0.34069 1921 -53.28 -0.023 0.357965 -0.16409 1920 -52.07 1.064 -0.27222 0.491742 1919 -53.76 -0.745 -0.55945 0.440785 1918 -51.33 1.569 -0.02827 1.19504 1917 -49.92 2.866 0.585401 0.814669 1916 -52.01 0.666 0.339817 0.753239 1915 -53 -0.431 -0.44253 0.399411 1914 -54.04 -1.573 -0.57246 -0.44465 1913 -52.67 -0.298 0.179739 -0.35575 1912 -52.76 -0.477 0.661377 -1.26544 1911 -53.14 -0.941 0.110342 -0.9035 1910 -53.53 -1.41 -0.61185 -1.16595 1909 -53.22 -1.175 -0.35842 -0.97252 1908 -54.21 -2.236 0.458455 -0.30679 1907 -51.88 0.025 0.515193 -0.49124 1906 -49.55 2.289 -0.268 0.568998 1905 -52.66 -0.887 -0.58826 0.162882 1904 -51.99 -0.281 0.079625 0.694498 1903 -51.12 0.524 0.597387 0.524256 1902 -51.21 0.374 0.081532 0.07588 1901 -51.7 -0.167 -0.58018 0.342248 1900 -51.33 0.158 -0.23234 -0.7221 1899 -50.96 0.49 0.54081 -0.26124 1898 -53.36 -1.944 0.383561 -0.91117 1897 -52.44 -1.054 -0.47427 -0.49768 1896 -50.82 0.538 -0.54887 -0.01126 1895 -52.32 -0.989 0.346445 0.10218 1894 -47.87 3.434 0.701773 1.187347 1893 -49.67 1.605 -0.14445 0.738799 1892 -52.02 -0.776 -0.80839 1.332056 1891 -49.14 2.068 -0.13562 0.574624 1890 -49.83 1.345 0.812669 0.349616 1889 -51.02 0.131 0.451108 0.042333 1888 -53.93 -2.797 -0.68728 -0.54426 1887 -50.19 0.93 -0.74982 0.008436 1886 -50.58 0.532 0.419266 -0.54969 1885 -50.67 0.435 0.956068 0.379988 1884 -51.66 -0.562 -0.04609 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