Midwest Brazil 1,500 Year Speleothem Oxygen Isotope Data Novello, V.F.; Vuille, M.; Cruz, F.W.; Stríkis, N.M.; de Paula, M.S.; Edwards, R.L.; Cheng, H.; Karmann, I.; Jaqueto, P.F.; Trindade, R.I.F.; Hartmann, G.A.; Moquet, J.S. Novello, V.F. Vuille, M. Cruz, F.W. Stríkis, N.M. de Paula, M.S. Edwards, R.L. Cheng, H. Karmann, I. Jaqueto, P.F. Trindade, R.I.F. Hartmann, G.A. Moquet, J.S. Monsoon earth science/paleoclimate/speleothems (delta 18O,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (age,null,null,year Common Era,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (Pau d'Alho Cave>LATITUDE -15.2055>LONGITUDE -56.8113) (Curupira Cave>LATITUDE -15.2003>LONGITUDE -56.7839) The South American Monsoon System (SAMS) is generally considered to be highly sensitive to Northern Hemisphere (NH) temperature variations on multi-centennial timescales. The direct influence of solar forcing on moisture convergence in global monsoon systems on the other hand, while well explored in modeling studies, has hitherto not been documented in proxy data from the SAMS region. Hence little is known about the sensitivity of the SAMS to solar forcing over the past millennium and how it might compete or constructively interfere with NH temperature variations that occurred primarily in response to volcanic forcing. Here we present a new annually-resolved oxygen isotope record from a 1500-year long stalagmite recording past changes in precipitation in the hitherto unsampled core region of the SAMS. This record details how solar variability consistently modulated the strength of the SAMS on centennial time scales during the past 1500 years. Solar forcing, besides the previously recognized influence from NH temperature changes and associated Intertropical Convergence Zone (ITCZ) shifts, appears as a major driver affecting SAMS intensity at centennial time scales. STUDY NOTES: High-resolution (near annual) 1,500-year speleothem oxygen isotope (d18O) data from stalagmites collected in two caves (Curupira and Pau d'Alho) located near Rosário Oeste City, Mato Grosso State, Brazil, as a paleorainfall proxy. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Novello, V.F. Investigator : Vuille, M. Investigator : Cruz, F.W. Investigator : Stríkis, N.M. Investigator : de Paula, M.S. Investigator : Edwards, R.L. Investigator : Cheng, H. Investigator : Karmann, I. Investigator : Jaqueto, P.F. Investigator : Trindade, R.I.F. Investigator : Hartmann, G.A. Investigator : Moquet, J.S. 2016-04-21 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/20043 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/curupira2016.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/alho2016.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/curupira2016.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/alho2016.txt English https://www.ncdc.noaa.gov/paleo/study/20043 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/curupira2016.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/alho2016.txt Valdir F. Novello, Mathias Vuille, Francisco W. Cruz, Nicolás M. Stríkis, Marcos Saito de Paula, R. Lawrence Edwards, Hai Cheng, Ivo Karmann, Plínio F. Jaqueto, Ricardo I.F. Trindade, Gelvam A. Hartmann and Jean S. Moquet2016Centennial-scale solar forcing of the South American Monsoon System recorded in stalagmitesScientific Reports24762610.1038/srep24762http://www.nature.com/articles/srep24762 START YEAR: 492 AD * END YEAR: 1971 AD -56.8113 -15.2055 -56.7839 -15.2003