Wang et al. 2004 NE Brazil Speleothem/Travertine Growth Phases Wang, X.; Auler, A.S.; Edwards, R.L.; Cheng, H.; Cristalli, P.S.; Smart, P.L.; Richards, D.A.; Shen, C.-C. Wang, X. Auler, A.S. Edwards, R.L. Cheng, H. Cristalli, P.S. Smart, P.L. Richards, D.A. Shen, C.-C. PAGES 2k Network PAGES LOTRED SA2k earth science/paleoclimate/speleothems (Lapa dos Brejoes>LATITUDE -10.1666>LONGITUDE -40.833) The tropics are the main source of the atmosphere's sensible and latent heat, and water vapour, and are therefore important for reconstructions of past climate. But long, accurately dated records of southern tropical palaeoclimate, which would allow the establishment of climatic connections to distant regions, have not been available. Here we present a 210,000-year (210-kyr) record of wet periods in tropical northeastern Brazil - a region that is currently semi-arid. The record is obtained from speleothems and travertine deposits that are accurately dated using the U/Th method. We find wet periods that are synchronous with periods of weak East Asian summer monsoons, cold periods in Greenland, Heinrich events in the North Atlantic and periods of decreased river runoff to the Cariaco basin. We infer that the wet periods may be explained with a southward displacement of the Intertropical Convergence Zone. This widespread synchroneity of climate anomalies suggests a relatively rapid global reorganization of the ocean- atmosphere system. We conclude that the wet periods probably affected rainforest distribution, as plant fossils show that forest expansion occurred during these intermittent wet intervals, and opened a forest corridor between the Amazonian and Atlantic rainforests. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Wang, X. Investigator : Auler, A.S. Investigator : Edwards, R.L. Investigator : Cheng, H. Investigator : Cristalli, P.S. Investigator : Smart, P.L. Investigator : Richards, D.A. Investigator : Shen, C.-C. 2004-12-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/8404 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/northeast-brazil2004.txt https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/northeast-brazil2004.txt English https://www.ncdc.noaa.gov/paleo/study/8404 https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/northeast-brazil2004.txt Wang, X., A.S. Auler, R.L. Edwards, H. Cheng, P.S. Cristalli, P.L. Smart, D.A. Richards, and C.-C. Shen. 2004. Wet periods in northeastern Brazil over the past 210 kyr linked to distant climate anomalies. Nature, 432, 740-743. doi:10.1038/nature03067 START YEAR: 132500 cal yr BP * END YEAR: 12800 cal yr BP -40.833 -10.1666 -40.833 -10.1666