noaa-ocean-21012 Niger Delta Stable Isotope and Geochemistry Data during the Last Deglaciation Parker, A.O.; Schmidt, M.W.; Jobe, Z.R.; Slowey, N.C. Niger Delta Stable Isotope and Geochemistry Data during the Last Deglaciation 2016-12-14 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/21012 Investigator A.O. Parker Investigator M.W. Schmidt Investigator Z.R. Jobe Investigator N.C. Slowey earth science paleoclimate paleoceanography barium/calcium,Globigerinoides ruber,null,micromole per mole,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,Globigerinoides ruber,null,per mil VPDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography number of samples,null,null,null,null,paleoceanography,null,null,N,Magnesium/Calcium number of analyses earth science paleoclimate paleoceanography magnesium/calcium,Globigerinoides ruber,one standard deviation,millimole per mole,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,Barium/Calcium number of analyses earth science paleoclimate paleoceanography delta 18O,Globigerinoides ruber,null,per mil VPDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography magnesium/calcium,Globigerinoides ruber,null,millimole per mole,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography barium/calcium,Globigerinoides ruber,one standard deviation,micromole per mole,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography depth,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean trace metals in carbonates earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean carbon isotopes geoscientificInformation 20910 cal yr BP 550 cal yr BP Complete 4.81 4.81 4.45 4.45 -1178 -1178 Ocean Atlantic Ocean North Atlantic Ocean Fan 17, Niger Delta>LATITUDE 4.81>LONGITUDE 4.45 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 Parker, A.O., M.W. Schmidt, Z.R. Jobe, and N.C. Slowey 2016 Earth and Planetary Science Letters 449 79-88 10.1016/j.epsl.2016.05.038

Widespread drought characterized the Heinrich 1 and Younger Dryas cold periods of the last deglaciation throughout much of Africa, causing large increases in dust emissions from the Sahara and Sahel. At the same time, increases in wind strength may have also contributed to dust flux, making it difficult to interpret dust records alone as reflecting changes in rainfall over the region. The Niger River has the third largest drainage basin in Africa and drains most of the Sahara and Sahel and thus preserves and propagates climatic signals. Here, we present new reconstructions of Niger Delta sea surface salinity and Niger River discharge for the last 20,000 years in order to more accurately reconstruct the onset of the Western African Monsoon system. Based on calculated d18OSEAWATER(d18OSW) and measured Ba/Ca ratios in planktonic foraminifera, these new records reflect changes in sub-Saharan precipitation across the Niger River Basin in West Africa and reveal that the West African Monsoon system began to intensify several thousand years after the equatorial Monsoon system in Central Africa. We also present new records of primary productivity in the Niger Delta that are related to wind-driven upwelling and show that productivity is decoupled from changes in Niger River discharge. Our results suggest that wind strength, rather than changes in monsoon moisture, was the primary driver of dust emissions from the Sahara and Sahel across the last deglaciation. STUDY NOTES: Provided Keywords: Deglaciation, G. ruber, abrupt climate change, West African Monsoon, Mg/Ca temperature, sea surface temperature, Ba/Ca ratios, Niger delta, Younger Dryas, Heinrich Event 1, LGM

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/parker2016/parker2016-fan17.txt Formatted Text File; Fan 17 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11