noaa-ocean-10517 South East Atlantic ODP1085 MIS 12-10 d13C Data Dickson, A.J.; Leng, M.J.; Maslin, M.A.; Röhl, U. South East Atlantic ODP1085 MIS 12-10 d13C Data 2011-02-02 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/10517 Investigator A.J. Dickson Investigator M.J. Leng Investigator M.A. Maslin Investigator U. Röhl earth science paleoclimate paleocean carbon isotopes geoscientificInformation Monsoon 473780 cal yr BP 335580 cal yr BP Complete -29.37 -29.37 13.6 13.6 -1713 -1713 Ocean Atlantic Ocean South Atlantic Ocean ODP 1085>LATITUDE -29.37>LONGITUDE 13.6 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 Dickson, A.J., M.J. Leng, M.A. Maslin, and U. Röhl. 2010. Oceanic, atmospheric and ice-sheet forcing of South East Atlantic Ocean productivity and South African monsoon intensity during MIS-12 to 10. Quaternary Science Reviews, Vol. 29, Issues 27-28, pp. 3936-3947, December 2010. doi:10.1016/j.quascirev.2010.09.014

Variations in the strength of coastal upwelling in the South East Atlantic Ocean and summer monsoonal rains over South Africa are controlled by the regional atmospheric circulation regime. Although information about these parameters exists for the last glacial period, little detailed information exists for older time periods. New information from ODP Site 1085 for Marine Isotope Stages (MIS) 12–10 shows that glacial–interglacial productivity trends linked to upwelling variability followed a pattern similar to the last glacial cycle, with maximums shortly before glacial maxima, and minimums shortly before glacial terminations. During the MIS-11/10 transition, several periodic oscillations in productivity and monsoonal proxies are best explained by southwards shifts in the southern sub-tropical high-pressure cells followed by abrupt northwards shifts. Comparison to coeval sea-surface temperature measurements suggests that these monsoonal cycles were tightly coupled to anti-phased hemispheric climate change, with an intensified summer monsoon during periods of Northern (Southern) Hemisphere cooling (warming). The timing of these events suggests a pacing by insolation over precession periods. A lack of similar regional circulation shifts during the MIS-13/12 transition is likely due to the large equatorwards shift in the tropical convection zone that occurred during this extreme glaciation. STUDY NOTES: Carbon and carbon isotope data from South East Atlantic for Marine Isotope Stages (MIS) 12 through 10. The age model for Site-1085 was determined by correlation of the benthic delta18O data to the LR04 curve.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/dickson2010/dickson2010.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/dickson2010/dickson2010.xls USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11