St. Marie, Madagascar Coral Sr/Ca, Density, Extension and Calcification Data from 1963-2006 CE Grove, C.A.; Zinke, J. Grove, C.A. Zinke, J. 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 (density,Porites sp.,null,gram per cubic centimeter,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (strontium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma atomic emission spectroscopy,N,from core STM4; interpolated linearly to monthly time steps) earth science/paleoclimate/corals and sclerosponges (strontium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma atomic emission spectroscopy,N,from core STM2; interpolated linearly to monthly time steps) earth science/paleoclimate/corals and sclerosponges (extension rate,Porites sp.,null,centimeter per year,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (strontium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma atomic emission spectroscopy,N,composite of STM4 and STM2; interpolated linearly to monthly time steps) earth science/paleoclimate/corals and sclerosponges (calcification rate,Porites sp.,null,gram per square centimeter per year,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (St. Marie>LATITUDE -17.092>LONGITUDE 49.86) Massive corals offer continuous records of climate locked within their skeleton, with the most commonly applied paleo-thermometer being Sr/Ca. Recently, however, problems with Sr/Ca thermometry indicate that the intrinsic variance of single-core Sr/Ca time series differs between cores. Here, we compare the Sr/Ca records and growth parameters of two Porites lutea colonies sampled from the same reef zone, 0.72 km apart, with two gridded SST datasets, ERSST and HadISST, off NE Madagascar. Specifically, we address seasonal and interannual variability as well as trend differences between records over the same 43 year period. The two gridded SST datasets showed strong seasonality and weak positive ENSO anomalies on a slow 43 year warming trend at significantly different rates. Both the coral Sr/Ca records showed the same clear seasonality and similar amplitudes in SST. However, on interannual timescales, they displayed diverging 43 year Sr/Ca trends and opposite responses to weak ENSO anomalies. Moreover, their growth response also differed as one coral showed increasing extension/calcification rates and Sr/Ca ratios (cooling) over the 43 years, while the other coral showed decreasing extension/calcification rates and Sr/Ca ratios (warming). Further, during positive ENSO events, the calcification rates of the two corals were negatively correlated, while skeletal density anomalies were opposite. Possible explanations to why these corals are so different may be related to the corals growth response to SST changes. The growth response of individual corals to increasing SST seems to be opposite, which in turn are likely related to biological factors. Consequently, coral growth responses explain much of the inter-colony Sr/Ca variability. STUDY NOTES: Chronology based on seasonal cycles in trace elements (Sr/Ca) Provided Keywords: corals, Sr/Ca, SST, Madagascar, Indian Ocean NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Grove, C.A. Investigator : Zinke, J. 2018-06-25 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/24477 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-stm4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-stm2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-srca.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-stm4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-stm2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-srca.txt English https://www.ncdc.noaa.gov/paleo/study/24477 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-stm4.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-stm2.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/grove2013/grove2013-srca.txt Grove, C.A., Kasper, S., Zinke, J., Pfeiffer, M., Garbe-Schönberg, D. and Brummer, G.-J.A.2013Confounding effects of coral growth and high SST variability on skeletal Sr/Ca: Implications for coral paleothermometryGeochemistry, Geophysics, Geosystems141277-129310.1002/ggge.20095 START YEAR: 1963 AD * END YEAR: 2006 AD 49.86 -17.092 49.86 -17.092