# South China Sea Isotope and Trace Metal Data Derived from Corals from 1877 to 1996 CE #----------------------------------------------------------------------- # 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/37666 # 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-37666.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/z1pv-3963 # # Science_Keywords: biogeochemical cycles #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/south_china_sea/liu2023/liu2023-xdh.txt # Data_Download_Description: NOAA Template File; Isotope and Trace Metal Data # #--------------------------------------- # Contribution_Date # Date: 2023-03-02 #--------------------------------------- # File_Last_Modified_Date # Date: 2023-04-12 #--------------------------------------- # Title # Study_Name: South China Sea Isotope and Trace Metal Data Derived from Corals from 1877 to 1996 CE #--------------------------------------- # Investigators # Investigators: Liu, Yi (https://orcid.org/0000-0003-4971-7718); Chen, Maoqing (https://orcid.org/0000-0002-0147-6495) #--------------------------------------- # Description_Notes_and_Keywords # Description: #--------------------------------------- # Publication # Authors: Yi Liu, Maoqing Chen, Ting Zhang, Rui Zhang, Fei Cao, Shaobo Sun, Wang Zheng, Ruoyu Sun, Jiubin Chen # Published_Date_or_Year: 2023-04-16 # Published_Title: Isotope compositions of century-long corals reveal significant dissolved Cu, Zn fluxes from human-accelerated weathering into the ocean # Journal_Name: Geophysical Research Letters # Volume: 50 # Edition: # Issue: 7 # Pages: # Report_Number: e2022GL102482 # DOI: 10.1029/2022GL102482 # Online_Resource: # Full_Citation: # Abstract: Human activities have liberated substantial amounts of biologically active metals into oceans. However, identifying the sources and migration processes of these metals is challenging. Here we present first century-long records of concentrations and isotope compositions of Zn and Cu (d66Zn and d65Cu) in two corals from the northern South China Sea. The results show dramatic enrichment in coral Zn and Cu concentrations since the 1980s, which coincide with d66Zn and d65Cu increases. Coupled with concurrent land use/cover changes, we suggest that the enrichment trends of Cu and Zn in corals are best explained by human-induced rock weathering and soil erosion, which transferred isotopically heavy Zn and Cu fluxes into the coastal ocean. The metal releases due to land use/cover changes relative to direct anthropogenic sources could be even more significant in the future given that anthropogenic releases have been legally controlled and started to decline in recent decades. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: # Grant: #--------------------------------------- # Site_Information # Site_Name: Xiaodonghai (XDH) # Location: South China Sea # Northernmost_Latitude: 18.1 # Southernmost_Latitude: 18.1 # Easternmost_Longitude: 109.3 # Westernmost_Longitude: 109.3 # Elevation_m: -5 #--------------------------------------- # Data_Collection # Collection_Name: XDH Isotopes # First_Year: 1890 # Last_Year: 1999 # Time_Unit: year Common Era # Core_Length_m: # Parameter_Keywords: trace metals, chemistry # 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) # ## year_top age at sample end,,,year Common Era,,corals and sclerosponges,,,N, ## year_bottom age at sample start,,,year Common Era,,corals and sclerosponges,,,N, ## Cu copper,Porites sp.,,microgram per gram,,corals and sclerosponges,,inductively-coupled plasma mass spectrometry,N, ## Zn zinc,Porites sp.,,microgram per gram,,corals and sclerosponges,,inductively-coupled plasma mass spectrometry,N, ## d66Zn_notes notes,,,,,corals and sclerosponges,,,C,replicate = replicate measurement; involving completely separate processing and analysis of different splits from the same sample power. ## d66Zn delta 66Zn,Porites sp.,,per mil JMC 3–0749L,,corals and sclerosponges,,multiple collector inductively-coupled plasma mass spectrometry,N, ## 2SD delta 66Zn,Porites sp.,two standard deviations,per mil JMC 3–0749L,,corals and sclerosponges,,,N,SD is the standard deviation estimated from the multiple measurements (n) of a single sample solution. ## n notes,,,count,,corals and sclerosponges,,,N,number of d66Zn coral measurements of a single sample solution #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: year_top year_bottom Cu Zn d66Zn_notes d66Zn 2SD n 1890 1894 0.27 1.27 NA NA NA NA 1895 1899 0.34 1.1 NA NA NA NA 1900 1904 0.5 0.8 NA NA NA NA 1905 1909 0.33 0.92 NA NA NA NA 1910 1914 1.31 0.89 NA NA NA NA 1915 1919 0.2 0.98 NA NA NA NA 1920 1924 0.73 1.14 NA NA NA NA 1925 1929 0.29 1.2 NA NA NA NA 1930 1934 0.35 1.45 NA NA NA NA 1935 1939 0.31 1.44 NA -0.03 0.05 3 1940 1944 0.32 1.57 NA 0.06 0.03 3 1945 1949 0.35 1.54 NA 0.09 0.02 3 1950 1954 0.24 0.8 NA 0.05 0.05 3 1955 1959 0.31 1.41 NA 0.09 0.03 3 1960 1964 0.35 1.32 NA -0.01 0.03 3 1965 1969 0.34 1.24 NA 0.09 0.02 3 1970 1974 0.23 1.03 NA 0.05 0.03 3 1975 1979 0.27 0.91 NA 0.04 0.02 3 1980 1984 0.37 2.13 NA 0.1 0.03 3 1985 1989 0.52 3.42 NA 0.08 0.05 3 1990 1994 0.71 2.22 NA 0.07 0.01 3 1995 1999 0.61 2.29 replicate 0.08 0.02 3 1995 1999 NA NA replicate 0.03 0.04 3 1995 1999 NA NA replicate 0.08 0.03 3