# 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: #--------------------------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/dolivo2018/dolivo2018-myr5_271.txt # Data_Download_Description: NOAA Template File; MYR5_271 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: Myrmidon Reef # Location: Australia # Northernmost_Latitude: -18.27 # Southernmost_Latitude: -18.27 # Easternmost_Longitude: 147.38 # Westernmost_Longitude: 147.38 # Elevation_m: -4 #--------------------------------------- # Data_Collection # Collection_Name: MYR5_271 Trace Metals DOlivo2018 # First_Year: 1996 # Last_Year: 2001 # Time_Unit: year Common Era # Core_Length_m: # Parameter_Keywords: trace metals # Notes: Porites solida #--------------------------------------- # 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 solida,,year Common Era,,corals and sclerosponges,,,N, ## Mg/Ca Magnesium/Calcium,Porites solida,,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 solida,,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 solida,,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 solida,,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 solida,,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 solida,,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 Oct-96 3.675704223 9.165599 1.190263 1.687722 478.240704 6.20356683 Dec-96 3.908110809 9.039087 1.1417 1.632392 444.712916 6.37956847 Feb-97 3.983411592 9.037582 1.147114 1.516585 448.009232 6.04118259 Apr-97 3.703933013 9.195101 1.236175 1.690344 474.250945 6.2609194 Jun-97 3.55116462 9.269842 1.265437 1.80066 498.000009 6.39443909 Aug-97 3.450865253 9.291976 1.290153 1.833801 501.753121 6.3282009 Oct-97 3.501626763 9.23266 1.267193 1.75773 488.478502 6.15491382 Dec-97 3.66264528 9.140576 1.220992 1.637923 464.552892 5.99913131 Feb-98 3.739066684 9.092915 1.211003 1.568829 451.871094 5.8659565 Apr-98 3.636530076 9.153863 1.249241 1.647558 468.22515 5.99139562 Jun-98 3.536441006 9.252679 1.278917 1.756773 489.292138 6.21272336 Aug-98 3.59904981 9.215249 1.261884 1.701051 479.89793 6.12216666 Oct-98 3.802473516 9.115298 1.20753 1.611624 466.838347 6.12815792 Dec-98 3.938074092 9.059108 1.181409 1.542957 457.449045 6.07627955 Feb-99 4.009977964 9.0284 1.162971 1.502585 454.584186 6.02533142 Apr-99 3.907085637 9.0939 1.195918 1.577983 470.776929 6.1653135 Jun-99 3.738736385 9.215551 1.261361 1.744779 496.981763 6.52327006 Aug-99 3.543675037 9.300157 1.319553 1.84921 508.385493 6.55299943 Oct-99 3.687206794 9.177188 1.238037 1.717986 489.360729 6.33457009 Dec-99 3.885798984 9.081343 1.1724 1.58203 467.045552 6.14744931 Feb-00 3.98010639 9.058549 1.159887 1.541388 464.489726 6.13489005 Apr-00 3.866569128 9.107384 1.198097 1.61638 480.677195 6.24984393 Jun-00 3.661968909 9.226429 1.257533 1.745179 500.31298 6.39079184 Aug-00 3.504766911 9.298995 1.298651 1.842837 507.60769 6.45871242 Oct-00 3.606149455 9.182237 1.234054 1.735196 496.594346 6.25737628 Dec-00 3.798522917 9.110782 1.188668 1.61724 474.905962 6.14312409 Feb-01 3.875052845 9.110172 1.206225 1.580646 461.885821 6.12508595 Apr-01 3.958679239 9.089852 1.202263 1.54471 460.38359 6.11501046