Brazil 85,000 Year Speleothem Oxygen Isotope Data Stríkis, N.M.; Cruz, F.W.; Barreto, E.A.S.; Naughton, F.; Vuille, M.; Cheng, H.; Voelker, A.H.L.; Zhang, H.; Karmann, I.; Edwards, R.L.; Auler, A.S.; Santos, R.V.; Sales, H.R. Stríkis, N.M. Cruz, F.W. Barreto, E.A.S. Naughton, F. Vuille, M. Cheng, H. Voelker, A.H.L. Zhang, H. Karmann, I. Edwards, R.L. Auler, A.S. Santos, R.V. Sales, H.R. earth science/paleoclimate/speleothems (depth,null,null,millimeter,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (sample identification,null,null,null,null,speleothems,null,null,C,null) earth science/paleoclimate/speleothems (age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (Marota Cave>LATITUDE -12.5833>LONGITUDE -41.0333) (Lapa Grande Cave>LATITUDE -14.4227>LONGITUDE -44.3656) (Paixão Cave>LATITUDE -12.65>LONGITUDE -41.05) (Lapa Sem Fim Cave>LATITUDE -16.15>LONGITUDE -44.6) Heinrich Stadials significantly affected tropical precipitation through changes in the interhemispheric temperature gradient as a result of abrupt cooling in the North Atlantic. Here, we focus on changes in South American monsoon precipitation during Heinrich Stadials using a suite of speleothem records covering the last 85 ky B.P. from eastern South America. We document the response of South American monsoon precipitation to episodes of extensive iceberg discharge, which is distinct from the response to the cooling episodes that precede the main phase of ice-rafted detritus deposition. Our results demonstrate that iceberg discharge in the western subtropical North Atlantic led to an abrupt increase in monsoon precipitation over eastern South America. Our findings of an enhanced Southern Hemisphere monsoon, coeval with the iceberg discharge into the North Atlantic, are consistent with the observed abrupt increase in atmospheric methane concentrations during Heinrich Stadials. STUDY NOTES: Speleothem oxygen isotope (d18O) records from 4 caves in Brazil: Lapa Grande (LG), Lapa Sem Fim (LSF), Marota (MAG) and Paixão (PX), for the past 85,000 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Stríkis, N.M. Investigator : Cruz, F.W. Investigator : Barreto, E.A.S. Investigator : Naughton, F. Investigator : Vuille, M. Investigator : Cheng, H. Investigator : Voelker, A.H.L. Investigator : Zhang, H. Investigator : Karmann, I. Investigator : Edwards, R.L. Investigator : Auler, A.S. Investigator : Santos, R.V. Investigator : Sales, H.R. 2018-03-26 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23510 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/paixao2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/lapagrande2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/marota2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/lapasemfim2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/paixao2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/lapagrande2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/marota2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/lapasemfim2018d18o.txt English https://www.ncdc.noaa.gov/paleo/study/23510 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/paixao2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/lapagrande2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/marota2018d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/lapasemfim2018d18o.txt Nicolás M. Stríkis, Francisco W. Cruz, Eline A. S. Barreto, Filipa Naughton, Mathias Vuille, Hai Cheng, Antje H. L. Voelker, Haiwei Zhang, Ivo Karmann, R. Lawrence Edwards, Augusto S. Auler, Roberto Ventura Santos and Hamilton Reis Sales2018South American monsoon response to iceberg discharge in the North AtlanticProceedings of the National Academy of Sciences10.1073/pnas.1717784115http://www.pnas.org/content/early/2018/03/20/1717784115 START YEAR: 84065 cal yr BP * END YEAR: 12084 cal yr BP -44.6 -16.15 -41.0333 -12.5833