Abaco Island Cave, Bahamas 64,000 Year Stable Isotope and Geochemical Data Arienzo, M.M.; Swart, P.K.; Broad, K.; Clement, A.C.; Pourmand, A.; Kakuk, B. Arienzo, M.M. Swart, P.K. Broad, K. Clement, A.C. Pourmand, A. Kakuk, B. earth science/paleoclimate/speleothems (strontium/calcium,calcium carbonate,null,millimole per mole,null,speleothems,raw,inductively-coupled plasma atomic emission spectroscopy,N,null) earth science/paleoclimate/speleothems (age,null,null,calendar year before present,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (magnesium/calcium,calcium carbonate,null,millimole per mole,null,speleothems,raw,inductively-coupled plasma atomic emission spectroscopy,N,null) earth science/paleoclimate/speleothems (delta 13C,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (depth,null,null,micrometer,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems (Abaco Island Cave>LATITUDE 26.23>LONGITUDE -77.16) Northern Hemisphere tropical paleoclimate records support significant changes associated with Dansgaard Oeschger (D/O) events and Heinrich stadials 1 to 6 during the last 64,000 years. However, few absolutely dated terrestrial records from the western Atlantic span the last six Heinrich stadials. Here we present geochemical results from three new stalagmites collected from a cave in the Bahamas which encompass Heinrich stadials 1 to 6. We build on a previous study of the d13C and d18O values of the calcite and d18O value of fluid inclusions from a single stalagmite from the same cave spanning the last three Heinrich stadials. Absolute geochronometry using U-Th equilibrium series demonstrates that the stalagmites formed between 63.8 to 13.8 kyr BP. The d13C and d18O values of the calcite show higher values associated with Heinrich stadials 1-6, and lower values during the D/O interstadial events. The Sr/Ca ratios of the calcite are shown to be relatively invariant, while in two of the samples the Mg/Ca ratios track the d13C values. Increases in the d18O values across Heinrich stadials 1-6 are interpreted as being driven by lower temperatures. The two deeper occurring stalagmites demonstrate increased Mg/Ca ratios and d13C values during Heinrich stadials 1 and 2 which are interpreted as a signal of reduced flow rates in the epikarst and increased water/rock interactions as a result of increased aridity which potentially occurred across all six Heinrich stadials. The observed reductions in mean annual temperature and amount of precipitation across Heinrich stadials are proposed to be driven by a reduction in sea surface temperatures in the North Atlantic and an expanded Bermuda High. During D/O interstadials, the Bahamas cave records likely indicate warmer and/or wetter climate; however the isotopic shifts are not as significant as the isotopic excursions associated with Heinrich stadials. STUDY NOTES: Speleothem stable isotope (d18O, d13C) and geochemical (Sr/Ca, Mg/Ca) data from stalagmites collected in Abaco Island Cave, Bahamas for the past 64,000 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Arienzo, M.M. Investigator : Swart, P.K. Investigator : Broad, K. Investigator : Clement, A.C. Investigator : Pourmand, A. Investigator : Kakuk, B. 2017-02-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/21490 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-09.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-01.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-12.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-03.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-09.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-01.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-12.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-03.txt English https://www.ncdc.noaa.gov/paleo/study/21490 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-09.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-01.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-12.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2017dc-03.txt Monica M. Arienzo, Peter K. Swart, Kenny Broad, Amy C. Clement, Ali Pourmand, Brian Kakuk 2017Multi-proxy evidence of millennial climate variability from multiple Bahamian speleothemsQuaternary Science Reviews10.​1016/​j.​quascirev.​2017.​02.​004 START YEAR: 63848 cal yr BP * END YEAR: 13766 cal yr BP -77.16 26.23 -77.16 26.23