noaa-ocean-11926 Global Eocene Nannoplankton Assemblage Data Schneider, L.J.; Bralower, T.J.; Kump, L.R. Global Eocene Nannoplankton Assemblage Data 2011-08-22 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/11926 Investigator L.J. Schneider Investigator T.J. Bralower Investigator L.R. Kump earth science paleoclimate paleocean population abundance geoscientificInformation 55000000 cal yr BP 39000000 cal yr BP Complete -65.16 49.0881 -13.0981 158.2592 -2914 -1004 Ocean Atlantic Ocean South Atlantic Ocean ODP 690B>LATITUDE -65.16>LONGITUDE 1.2 Ocean Indian Ocean ODP762>LATITUDE -19.8869>LONGITUDE 112.2539 Ocean Southern Ocean ODP1263B>LATITUDE -28.5327>LONGITUDE 2.7794 Ocean Pacific Ocean North Pacific Ocean ODP1210>LATITUDE 32.2236>LONGITUDE 158.2592 Ocean Southern Ocean ODP1137>LATITUDE -56.8333>LONGITUDE 68.0933 Ocean Southern Ocean ODP1135>LATITUDE -59.7>LONGITUDE 84.2733 Ocean Atlantic Ocean North Atlantic Ocean ODP549>LATITUDE 49.0881>LONGITUDE -13.0981 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 Leah J.Schneider, Timothy J.Bralower, Lee R.Kump 2011 Palaeogeography, Palaeoclimatology, Palaeoecology 310 3-4 152-162 10.1016/j.palaeo.2011.06.018 https://www.sciencedirect.com/science/article/pii/S0031018211003373?via%3Dihub

Nannoplankton play a significant role in the global carbon cycle; changes in the composition of the assemblage can influence primary productivity, carbon burial, and ultimately climate. Here counts of nannofossils in Eocene samples document one of the largest nannoplankton assemblage turnovers of the Cenozoic Era. This event is marked by the global expansion of Reticulofenestra at the termination of the early Eocene climatic optimum (EECO), and continues through the progressive cooling to the earliest Oligocene glaciation. To understand the mechanisms driving this assemblage shift we use multivariate statistical techniques and carbon and oxygen isotope records from localities worldwide. We find that the turnover in the global nannofossil assemblage is tied to thermal destratification of the ocean and a coincident decrease in the efficiency of the oceanic biologic pump at the height of the EECO. We propose that increased vertical mixing and increased nutrient supply to surface waters during the EECO caused a shift in the trophic structure towards enhanced productivity, influencing the global nannoplankton population. STUDY NOTES: Tables of nannofossil counts from Eocene sediments collected from 7 Ocean Drilling Program (ODP) or Deep Sea Drilling Program (DSDP) cores distributed around the global ocean. Smear slides were prepared from sediment and 300 specimens per slide were counted.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schneider2011/schneider2011.xls GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/schneider2011/schneider2011.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11