noaa-cave-20043 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. Midwest Brazil 1,500 Year Speleothem Oxygen Isotope Data 2016-04-21 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20043 Investigator V.F. Novello Investigator M. Vuille Investigator F.W. Cruz Investigator N.M. Stríkis Investigator M.S. de Paula Investigator R.L. Edwards Investigator H. Cheng Investigator I. Karmann Investigator P.F. Jaqueto Investigator R.I.F. Trindade Investigator G.A. Hartmann Investigator J.S. Moquet 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 oxygen isotopes geoscientificInformation Monsoon 492 AD 1971 AD 1458 cal yr BP -21 cal yr BP Complete -15.2055 -15.2003 -56.8113 -56.7839 Continent South America Brazil Pau d'Alho Cave>LATITUDE -15.2055>LONGITUDE -56.8113 Continent South America Brazil Curupira Cave>LATITUDE -15.2003>LONGITUDE -56.7839 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII 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. Moquet 2016 Scientific Reports 24762 6 10.1038/srep24762 http://www.nature.com/articles/srep24762

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/curupira2016.txt Data File; Curupira Cave Speleothem Oxygen Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/alho2016.txt Data File; Pau d'Alho Cave Speleothem Oxygen Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11