Havannah Island, Great Barrier Reef, Bimonthly Coral Linear Extension, Trace Elements and Boron Isotopes from 1989-2009 CE D'Olivo, J.P.; McCulloch, M.T. D'Olivo, J.P. McCulloch, M.T. earth science/paleoclimate/corals and sclerosponges (magnesium/calcium,Porites sp.,null,mole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (delta 11B,Porites sp.,null,per mil SRM 951,null,corals and sclerosponges,interpolated,thermal ionization mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (lithium/magnesium,Porites sp.,null,mole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (lithium/calcium,Porites sp.,null,micromole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (age,null,null,year Common Era,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (strontium/calcium,Porites sp.,null,mole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (boron/calcium,Porites sp.,null,mole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (uranium/calcium,Porites sp.,null,micromole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges (extension rate,Porites sp.,null,centimeter per year,null,corals and sclerosponges,interpolated,null,N,interpolated linearly to bimonthly time steps) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Havannah Island HAV09_3>LATITUDE -18.836043>LONGITUDE 146.525887) Severe, global-scale thermal stress events like those of 1998 and 2016, are becoming more frequent and intense, potentially compromising the future of coral reefs. Here we report the effects of the 1998 bleaching event on coral calcification as well as the composition of the calcifying fluid (cf) from which corals precipitate their calcium carbonate skeletons. This was investigated by using the Sr/Ca, Li/Mg (temperature), and boron isotopes (d11B) and B/Ca (carbonate chemistry) proxies in a Porites sp. coral. Following the summer of 1998 the coral exhibited a prolonged period (~18 months) of reduced calcification (~60%) and a breakdown in the seasonality of the geochemical proxies. However, the maintenance of elevated dissolved inorganic carbon (DICcf; >×2 seawater) and pHcf (>8.3 compared to seawater ~8.0) even during severe stress of 1998 indicate that a minimum threshold of high aragonite saturation state (Ocf) of ~14 (~×4 seawater), is an essential pre-requisite for coral calcification. However, despite maintaining elevated levels of Ocf even under severe stress, coral growth is still impaired. We attribute this to reductions in either the effective active volume of calcification and/or DICcf as bleaching compromises the photosynthetically fixed carbon pool available to the coral. STUDY NOTES: Trace element (Mg/Ca, Sr/Ca, U/Ca, Li/Mg, B/Ca and Li/Ca), boron isotopes and linear extension sampled along four sample paths Provided Keywords: Thermal stress, calcifying fluid, biomineralization NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : D'Olivo, J.P. Investigator : McCulloch, M.T. 2017-09-18 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22670 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-d.txt English https://www.ncdc.noaa.gov/paleo/study/22670 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/great_barrier/d-olivo2017/d-olivo-hav09_3-d.txt D’Olivo, J.P. and M.T. McCulloch2017Response of coral calcification and calcifying fluid composition to thermally induced bleaching stressScientific Reports710.1038/s41598-017-02306-x START YEAR: 1989 AD * END YEAR: 2009 AD 146.525887 -18.836043 146.525887 -18.836043