noaa-cave-8404 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 et al. 2004 NE Brazil Speleothem/Travertine Growth Phases 2004-12-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/8404 Investigator X. Wang Investigator A.S. Auler Investigator R.L. Edwards Investigator H. Cheng Investigator P.S. Cristalli Investigator P.L. Smart Investigator D.A. Richards Investigator C.-C. Shen earth science paleoclimate speleothems age control geoscientificInformation PAGES 2k Network PAGES LOTRED SA2k 132500 cal yr BP 12800 cal yr BP Complete -10.1666 -10.1666 -40.833 -40.833 500 500 Continent South America Brazil Lapa dos Brejoes>LATITUDE -10.1666>LONGITUDE -40.833 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 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

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/southamerica/brazil/northeast-brazil2004.txt USA/NOAA DIF Version 9.8.4 2019-04-01 2019-04-01