Abaco Island Cave, Bahamas 13-32 KYrBP Speleothem Stable Isotope Data Arienzo, M.M.; Swart, P.K.; Pourmand, A.; Broad, K.; Clement, A.C.; Murphy, L.N.; Vonhof, H.B.; Kakuk, B. Arienzo, M.M. Swart, P.K. Pourmand, A. Broad, K. Clement, A.C. Murphy, L.N. Vonhof, H.B. Kakuk, B. earth science/paleoclimate/speleothems (age,null,null,calendar year before present,null,speleothems,null,null,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 (Abaco Island Cave>LATITUDE 26.23>LONGITUDE -77.16) Temperature reconstructions across Heinrich stadials 1-3 are presented from an absolute-dated speleothem from Abaco Island in the Bahamas to understand the nature of climate change across these intervals in the subtropical Atlantic. The stalagmite carbonate record, dated by the U-Th geochronometry technique, includes higher d18O and d13C values within Heinrich stadials 1, 2, and 3 followed by rapid declines at the end of the stadials. To aid in the interpretation of these results, the d18O of fluid inclusions associated with the Heinrich stadials were also analyzed. These measurements, which allowed for the relative influence of temperature and d18O of precipitation to be distinguished, demonstrate minimal changes in the d18O of fluid inclusions, suggesting that changes in the d18O values of the speleothem carbonate associated with Heinrich stadials 1-3 are principally driven by an average ~4C temperature decrease, rather than a change in the d18O of the rainfall (hence rainfall amount). These findings support previous work in the North Atlantic and are consistent with the climate response to a weakening of the Atlantic meridional overturning circulation. STUDY NOTES: Stable isotope (d18O, d13C) data from a stalagmite collected in a submerged cave in the Bahamas. Data extend over the last three Heinrich stadials (~13-32 KYrBP). NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Arienzo, M.M. Investigator : Swart, P.K. Investigator : Pourmand, A. Investigator : Broad, K. Investigator : Clement, A.C. Investigator : Murphy, L.N. Investigator : Vonhof, H.B. Investigator : Kakuk, B. 2016-04-26 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20085 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2015iso.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2015iso.txt English https://www.ncdc.noaa.gov/paleo/study/20085 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/atlantic/abaco2015iso.txt Monica M. Arienzo, Peter K. Swart, Ali Pourmand, Kenny Broad, Amy C. Clement, Lisa N. Murphy, Hubert B. Vonhof, Brian Kakuk2015Bahamian speleothem reveals temperature decrease associated with Heinrich stadialsEarth and Planetary Science Letters430377-38610.1016/j.epsl.2015.08.035http://www.sciencedirect.com/science/article/pii/S0012821X15005610 START YEAR: 32076 cal yr BP * END YEAR: 13766 cal yr BP -77.16 26.23 -77.16 26.23