noaa-forcing-25930 Paleo-pCO2 Database ODP1264 5 Million Year Boron Isotope and CO2 Data Stap, L.B.; de Boer, B.; Ziegler, M.; Bintanja, R.; Lourens, L.J.; van de Wal, R.S.W. Paleo-pCO2 Database ODP1264 5 Million Year Boron Isotope and CO2 Data 2019-01-02 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/25930 Investigator L.B. Stap Investigator B. de Boer Investigator M. Ziegler Investigator R. Bintanja Investigator L.J. Lourens Investigator R.S.W. van de Wal earth science paleoclimate climate forcing carbon dioxide geoscientificInformation 6350000 cal yr BP 538700 cal yr BP Complete -28.53 -28.53 2.85 2.85 -2504 -2504 Ocean Atlantic Ocean South Atlantic Ocean ODP1264>LATITUDE -28.53>LONGITUDE 2.85 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 Lennert B. Stap, Bas de Boer, Martin Ziegler, Richard Bintanja, Lucas J. Lourens, Roderik S.W. van de Wal 2016 Earth and Planetary Science Letters 439 1-10 10.1016/j.epsl.2016.01.022 https://www.sciencedirect.com/science/article/pii/S0012821X16000388

During the past five million yrs, benthic d18O records indicate a large range of climates, from warmer than today during the Pliocene Warm Period to considerably colder during glacials. Antarctic ice cores have revealed Pleistocene glacial-interglacial CO2 variability of 60-100 ppm, while sea level fluctuations of typically 125 m are documented by proxy data. However, in the pre-ice core period, CO2 and sea level proxy data are scarce and there is disagreement between different proxies and different records of the same proxy. This hampers comprehensive understanding of the long-term relations between CO2, sea level and climate. Here, we drive a coupled climate-ice sheet model over the past five million years, inversely forced by a stacked benthic d18O record. We obtain continuous simulations of benthic d18O, sea level and CO2 that are mutually consistent. Our model shows CO2 concentrations of 300 to 470 ppm during the Early Pliocene. Furthermore, we simulate strong CO2 variability during the Pliocene and Early Pleistocene. These features are broadly supported by existing and new d11B-based proxy CO2 data, but less by alkenone-based records. The simulated concentrations and variations therein are larger than expected from global mean temperature changes. Our findings thus suggest a smaller Earth System Sensitivity than previously thought. This is explained by a more restricted role of land ice variability in the Pliocene. The largest uncertainty in our simulation arises from the mass balance formulation of East Antarctica, which governs the variability in sea level, but only modestly affects the modeled CO2 concentrations. STUDY NOTES: Paleo-CO2 derived from boron isotope measurements on marine sediment core ODP1264, contributed to the Paleo-pCO2 Database

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/stap2016odp1264boron.txt NOAA Template File; ODP1264 Boron Isotope and CO2 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/stap2016odp1264boron.xlsx Excel File; ODP1264 Boron Isotope and CO2 Data USA/NOAA DIF Version 9.8.4 2019-01-30 2019-01-30