# Great Barrier Reef, Porites spp. bimonthly trace elements 1990-2013 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/34392 # 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-34392.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: Sea Surface Temperature Reconstruction #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/dolivo2018/dolivo2018-1709_6.txt # Data_Download_Description: NOAA Template File; 1709_6 Trace Metals Data # # Original_Source_URL: https://data.mendeley.com/datasets/ww8mvgzymf/2 # Original_Source_Description: Data supplement at Mendeley where a copy of the data was obtained. #--------------------------------------- # Contribution_Date # Date: 2024-02-09 #--------------------------------------- # File_Last_Modified_Date # Date: 2024-02-09 #--------------------------------------- # Title # Study_Name: Great Barrier Reef, Porites spp. bimonthly trace elements 1990-2013 CE #--------------------------------------- # Investigators # Investigators: D'Olivo, Juan Pablo (https://orcid.org/0000-0002-3291-7484); Sinclair, Daniel J.; Rankenburg, Kai (https://orcid.org/0000-0003-3708-9304); McCulloch, Malcolm Thomas (https://orcid.org/0000-0003-1538-1558) #--------------------------------------- # Description_Notes_and_Keywords # Description: Contributed as part of the Great Barrier Reef Coral Skeletal Records Database (GBRCD). # Provided Keywords: Great Barrier Reef, Trace elements, Coral, Multiproxy calibration #--------------------------------------- # Publication # Authors: D'Olivo, J.P., Sinclair, D.J., Rankenburg, K. and McCulloch, M.T. # Published_Date_or_Year: 2018 # Published_Title: A universal multi-trace element calibration for reconstructing sea surface temperatures from long-lived Porites corals: Removing 'vital-effects' # Journal_Name: Geochimica et Cosmochimica Acta # Volume: 239 # Edition: # Issue: # Pages: 109-135 # Report_Number: # DOI: 10.1016/j.gca.2018.07.035 # Online_Resource: # Full_Citation: # Abstract: Trace element abundances in corals can potentially provide high-resolution seasonally resolved constraints on past sea-surface temperatures, much needed to improve our understanding of climate variability on interannual to centennial time scales. A major limitation to the general application of trace element (TE) paleo-thermometers to coral fossil records is the presence of ‘vital effects’, which result in the need for colony-specific temperature calibrations. Here we demonstrate that reliable proxy temperatures from massive Porites corals can be achieved by using a universal multi-trace element calibration scheme (UMTECS). Using modern massive Porites corals living in well characterized sea surface temperature (SST) environments we first confirm that Sr/Ca and Li/Mg ratios are the most robust SST proxies compared to other trace element ratios (Mg/Ca, U/Ca, B/Ca and Li/Ca). Importantly we find that the slopes (and intercepts) of the Sr/Ca vs SST relationship are linearly correlated with the slopes from the Li/Mg vs SST relationship and provide a simple mathematical explanation for this phenomenon based on the tendency for all coral data to cluster around a single common ‘centroid’. Based on this tight empirical correlation between Sr/Ca and Li/Mg thermometers we show that a ‘universal’ calibration strategy can be applied that largely circumvents ‘vital effects’. Using this approach, we show that accurate more reliable reconstructions of paleo-temperatures can be undertaken using fossil Porites corals without the need for a priori colony-specific temperature calibrations. The general viability of this approach is demonstrated using an independent set of coral data where we show that UMTECS outperforms other ‘aggregating’ calibration techniques. For P. lutea and P. lobata the scheme produces temperature estimates with root-mean-square errors (RMSE) that are only 0.3 °C larger than those using colony-specific calibrations. This compares with ‘averaged TE-SST calibrations’ which produce RMSEs between 0.4 and 0.6 °C larger than colony-specific calibrations for P. lutea and P. lobata. However, we note that the success of our approach diminishes where data for individual corals deviate markedly from the common centroid, which appear to be related to species differences. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Australian Research Council # Grant: Laureate Fellowship FL120100049 #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Consejo Nacional de Ciencia y Tecnología (CONACyT) # Grant: 238264 #--------------------------------------- # Site_Information # Site_Name: Reef 17-065 # Location: Australia # Northernmost_Latitude: -17.876 # Southernmost_Latitude: -17.876 # Easternmost_Longitude: 146.729 # Westernmost_Longitude: 146.729 # Elevation_m: -4 #--------------------------------------- # Data_Collection # Collection_Name: 1709_6 Trace Metals DOlivo2018 # First_Year: 1990 # Last_Year: 1994 # Time_Unit: year Common Era # Core_Length_m: # Parameter_Keywords: trace metals # Notes: Porites lutea #--------------------------------------- # 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 lutea,,year Common Era,,corals and sclerosponges,,,N, ## Mg/Ca Magnesium/Calcium,Porites lutea,,millimole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,Bimonthly interpolation. Thermo Fisher Scientific X Series II quadrupole inductively coupled plasma mass spectrometer ## Sr/Ca Strontium/Calcium,Porites lutea,,millimole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,Bimonthly interpolation. Thermo Fisher Scientific X Series II quadrupole inductively coupled plasma mass spectrometer ## U/Ca Uranium/Calcium,Porites lutea,,micromole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,Bimonthly interpolation. Thermo Fisher Scientific X Series II quadrupole inductively coupled plasma mass spectrometer ## Li/Mg Lithium/Magnesium,Porites lutea,,millimole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,Bimonthly interpolation. Thermo Fisher Scientific X Series II quadrupole inductively coupled plasma mass spectrometer ## B/Ca Boron/Calcium,Porites lutea,,micromole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,Bimonthly interpolation. Thermo Fisher Scientific X Series II quadrupole inductively coupled plasma mass spectrometer ## Li/Ca Lithium/Calcium,Porites lutea,,micromole per mole,,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,Bimonthly interpolation. Thermo Fisher Scientific X Series II quadrupole inductively coupled plasma mass spectrometer #------------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: NA age_CE Mg/Ca Sr/Ca U/Ca Li/Mg B/Ca Li/Ca Apr-90 4.317801562 9.025375 1.09677 1.486318 454.87664 6.41135777 Jun-90 4.197838669 9.103883 1.144065 1.585405 475.01543 6.65465764 Aug-90 4.30748817 9.063353 1.118088 1.534314 455.68803 6.60432382 Oct-90 4.478617666 8.971472 1.067681 1.439472 429.97374 6.43455127 Dec-90 4.602899387 8.903976 1.031969 1.348612 407.71079 6.20565632 Feb-91 4.465119929 8.991428 1.072007 1.417113 419.07093 6.32321635 Apr-91 4.359026357 9.069501 1.081832 1.547268 469.98625 6.74028195 Jun-91 4.184041643 9.136904 1.168598 1.600107 485.18208 6.69342992 Aug-91 4.354975832 9.077526 1.141023 1.51643 474.50452 6.5926318 Oct-91 4.600844631 8.960955 1.076975 1.388398 458.01334 6.38430453 Dec-91 4.598756961 8.879014 1.041667 1.329402 436.00009 6.11262043 Feb-92 4.543155287 8.900175 1.052543 1.347304 419.09493 6.11658603 Apr-92 4.351133409 9.006702 1.111526 1.473635 442.48169 6.40301595 Jun-92 4.184976987 9.098756 1.164741 1.594452 466.20594 6.66954233 Aug-92 4.34705481 9.016755 1.121726 1.521605 450.76129 6.60595523 Oct-92 4.521907312 8.930229 1.074439 1.435809 439.40625 6.48768653 Dec-92 4.623438854 8.89096 1.050261 1.345665 437.27818 6.21913306 Feb-93 4.572191596 8.923599 1.014855 1.393906 432.23805 6.36571498 Apr-93 4.277495806 9.072466 1.122948 1.560723 468.78411 6.66906068 Jun-93 4.128679082 9.11683 1.174882 1.627892 491.18697 6.71783947 Aug-93 4.268125416 9.048004 1.130768 1.549473 462.67121 6.60629165 Oct-93 4.467876676 8.936527 1.067745 1.425914 435.77893 6.36572913 Dec-93 4.554662247 8.882075 1.034674 1.337184 419.11806 6.08803067 Feb-94 4.506155674 8.941759 1.062594 1.407499 435.04861 6.3394043 Apr-94 4.293068121 9.054483 1.127939 1.548337 464.2061 6.64029627 Jun-94 4.125073484 9.138264 1.181031 1.642872 494.16312 6.77425075