# Great Barrier Reef, Porites sp. annual Boron isotopes 1940-2009 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/39002 # 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-39002.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: # # Science_Keywords: hydrology, ocean acidification #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/dolivo2015/dolivo2015-pan02a.txt # Data_Download_Description: NOAA Template File; PAN02a d11B Data # #--------------------------------------- # Contribution_Date # Date: 2024-02-08 #--------------------------------------- # File_Last_Modified_Date # Date: 2024-02-08 #--------------------------------------- # Title # Study_Name: Great Barrier Reef, Porites sp. annual Boron isotopes 1940-2009 CE #--------------------------------------- # Investigators # Investigators: D'Olivo, Juan Pablo (https://orcid.org/0000-0002-3291-7484); McCulloch, Malcolm Thomas (https://orcid.org/0000-0003-1538-1558); Eggins, Stephen (https://orcid.org/0000-0002-0007-5753); Trotter, Julie (https://orcid.org/0000-0002-0505-488X) #--------------------------------------- # Description_Notes_and_Keywords # Description: Contributed as part of the Great Barrier Reef Coral Skeletal Records Database (GBRCD). # Provided Keywords: Great Barrier Reef, pH, water quality #--------------------------------------- # Publication # Authors: D'Olivo, J.P., McCulloch, M.T., Eggins, S.M. and Trotter, J. # Published_Date_or_Year: 2015 # Published_Title: Coral records of reef-water pH across the central Great Barrier Reef, Australia: assessing the influence of river runoff on inshore reefs # Journal_Name: Biogeosciences # Volume: 12 # Edition: # Issue: # Pages: 1223-1236 # Report_Number: # DOI: 10.5194/bg-12-1223-2015 # Online_Resource: # Full_Citation: # Abstract: The boron isotopic (d11Bcarb) compositions of long-lived Porites coral are used to reconstruct reef-water pH across the central Great Barrier Reef (GBR) and assess the impact of river runoff on inshore reefs. For the period from 1940 to 2009, corals from both inner- and mid-shelf sites exhibit the same overall decrease in d11Bcarb of 0.086 ± 0.033‰ per decade, equivalent to a decline in seawater pH (pHsw) of ~0.017 ± 0.007 pH units per decade. This decline is consistent with the long-term effects of ocean acidification based on estimates of CO2 uptake by surface waters due to rising atmospheric levels. We also find that, compared to the mid-shelf corals, the d11Bcarb compositions of inner-shelf corals subject to river discharge events have higher and more variable values, and hence higher inferred pHsw values. These higher d11Bcarb values of inner-shelf corals are particularly evident during wet years, despite river waters having lower pH. The main effect of river discharge on reef-water carbonate chemistry thus appears to be from reduced aragonite saturation state and higher nutrients driving increased phytoplankton productivity, resulting in the drawdown of pCO2 and increase in pHsw. Increased primary production therefore has the potential to counter the more transient effects of low-pH river water (pHrw) discharged into near-shore environments. Importantly, however, inshore reefs also show a consistent pattern of sharply declining coral growth that coincides with periods of high river discharge. This occurs despite these reefs having higher pHsw, demonstrating the overriding importance of local reef-water quality and reduced aragonite saturation state on coral reef health. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Australian Research Council Centre of Excellence for Coral Reef Studies # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Western Australian Premier’s Fellowship # Grant: #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Australian Research Council # Grant: ARC Laureate Fellowship #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Research School of Earth Science, Australian National University # Grant: PhD scholarship #--------------------------------------- # Funding_Agency # Funding_Agency_Name: NERP Tropical Ecosystems Hub # Grant: Project 1.3 #--------------------------------------- # Site_Information # Site_Name: Pandora Reef # Location: Australia # Northernmost_Latitude: -18.81 # Southernmost_Latitude: -18.81 # Easternmost_Longitude: 146.43 # Westernmost_Longitude: 146.43 # Elevation_m: -4 #--------------------------------------- # Data_Collection # Collection_Name: PAN02a d11B D'Olivo2015 # First_Year: 1963 # Last_Year: 2002 # Time_Unit: year Common Era # Core_Length_m: # Parameter_Keywords: chemistry # Notes: Porites sp. #--------------------------------------- # 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,Porites sp.,,year Common Era,,corals and sclerosponges,,,N, ## d11B delta 11B,Porites sp.,,per mil,,corals and sclerosponges,corrected,,N,NBS 951 boric acid. Positive thermal ionization mass spectrometry, Thermo Finnigan TRITON #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: NA age_CE d11B 2002 24.214 2001 24.799 2000 24.071 1999 24.327 1998 24.321 1997 24.085 1996 24.047 1995 23.800 1994 23.378 1993 23.438 1992 24.556 1991 25.282 1990 25.625 1989 25.952 1988 25.256 1987 24.052 1986 23.712 1985 24.733 1984 24.422 1983 24.818 1982 25.218 1981 24.265 1980 25.304 1979 25.001 1978 25.099 1977 23.931 1976 25.458 1975 24.515 1974 23.813 1973 24.704 1972 24.559 1971 25.169 1970 23.040 1969 23.633 1968 25.042 1967 24.197 1966 24.305 1965 25.168 1964 23.609 1963 24.931