Northern Peru 250KYr Stalagmite Stable Isotope Data Cheng, H.; Sinha, A.; Cruz, F.W.; Wang, X.; Edwards, R.L.; d'Horta, F.M.; Ribas, C.C.; Vuille, M.; Stott, L.D.; Auler, A.S. Cheng, H. Sinha, A. Cruz, F.W. Wang, X. Edwards, R.L. d'Horta, F.M. Ribas, C.C. Vuille, M. Stott, L.D. Auler, A.S. hydrology 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,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems (age,null,null,calendar kiloyear before present,null,speleothems,null,null,N,null) earth science/paleoclimate/speleothems (delta 13C,calcium carbonate,null,per mil VPDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/speleothems earth science/paleoclimate/speleothems (Cueva del Diamante>LATITUDE -5.73>LONGITUDE -77.5) (El Condor Cave>LATITUDE -5.93>LONGITUDE -77.3) Precise characterization of hydroclimate variability in Amazonia on various timescales is critical to understanding the link between climate change and biodiversity. Here we present absolute-dated speleothem oxygen isotope records that characterize hydroclimate variation in western and eastern Amazonia over the past 250 and 20 ka, respectively. Although our records demonstrate the coherent millennial-scale precipitation variability across tropical-subtropical South America, the orbital-scale precipitation variability between western and eastern Amazonia exhibits a quasi-dipole pattern. During the last glacial period, our records imply a modest increase in precipitation amount in western Amazonia but a significant drying in eastern Amazonia, suggesting that higher biodiversity in western Amazonia, contrary to 'Refugia Hypothesis', is maintained under relatively stable climatic conditions. In contrast, the glacial-interglacial climatic perturbations might have been instances of loss rather than gain in biodiversity in eastern Amazonia, where forests may have been more susceptible to fragmentation in response to larger swings in hydroclimate. STUDY NOTES: Stable isotope data (d13C and d18O) data from 7 stalagmites collected in 2 caves in northern Peru NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Cheng, H. Investigator : Sinha, A. Investigator : Cruz, F.W. Investigator : Wang, X. Investigator : Edwards, R.L. Investigator : d'Horta, F.M. Investigator : Ribas, C.C. Investigator : Vuille, M. Investigator : Stott, L.D. Investigator : Auler, A.S. 2013-02-14 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13836 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-f.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/condor2013elc-b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/condor2013elc-a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c-f.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-f.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/condor2013elc-b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/condor2013elc-a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c-f.txt English https://www.ncdc.noaa.gov/paleo/study/13836 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-f.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/condor2013elc-b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/condor2013elc-a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c-d.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/peru/diamante2013nar-c-f.txt Hai Cheng, Ashish Sinha, Francisco W. Cruz, Xianfeng Wang, R. Lawrence Edwards, Fernando M. d'Horta, Camila C. Ribas, Mathias Vuille, Lowell D. Stott, and Augusto S. Auler. 2013. Climate change patterns in Amazonia and biodiversity. Nature Communications, Vol. 4, 1411. DOI: 10.1038/ncomms2415 START YEAR: 246360 cal yr BP * END YEAR: 290 cal yr BP -77.5 -5.93 -77.3 -5.73