noaa-forcing-24310 Paleo-pCO2 Database Malta Middle Miocene Boron Isotope and CO2 Data Badger, M.P.S.; Lear, C.H.; Pancost, R.D.; Foster, G.L.; Bailey, T.R.; Leng, M.J.; Abels, H.A. Paleo-pCO2 Database Malta Middle Miocene Boron Isotope and CO2 Data 2018-05-30 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/24310 Investigator M.P.S. Badger Investigator C.H. Lear Investigator R.D. Pancost Investigator G.L. Foster Investigator T.R. Bailey Investigator M.J. Leng Investigator H.A. Abels earth science paleoclimate climate reconstructions|paleoceanography pH,delta 11B,null,dimensionless,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 11B,planktic foraminifer,two standard deviations,per mil,null,paleoceanography,null,ion chromatography|multiple collector inductively-coupled plasma mass spectrometry,N,Globigerinoides/Trilobatus trilobus earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Globigerinoides trilobus earth science paleoclimate climate forcing|climate reconstructions|paleoceanography age,null,null,million years ago,null,climate forcing|climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 11B,planktic foraminifer,null,per mil,null,paleoceanography,null,ion chromatography|multiple collector inductively-coupled plasma mass spectrometry,N,Globigerinoides/Trilobatus trilobus earth science paleoclimate climate forcing|paleoceanography carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing|paleoceanography,null,null,N,based on 11B of Globigerinoides trilobus earth science paleoclimate climate forcing carbon dioxide geoscientificInformation 13798000 cal yr BP 13698000 cal yr BP Complete 35.9155 35.9155 14.3343 14.3343 Ocean Atlantic Ocean North Atlantic Ocean Mediterranean Sea Malta Ras il-Pellegrin Section>LATITUDE 35.9155>LONGITUDE 14.3343 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 Marcus P.S. Badger, Caroline H. Lear, Richard D. Pancost, Gavin L. Foster, Trevor R. Bailey, Melanie J. Leng, Hemmo A. Abels 2013 Paleoceanography and Paleoclimatology 28 1 42-53 10.1002/palo.20015 https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/palo.20015

The development of a permanent, stable ice sheet in East Antarctica happened during the middle Miocene, about 14 million years (Myr) ago. The middle Miocene therefore represents one of the distinct phases of rapid change in the transition from the "greenhouse" of the early Eocene to the "icehouse" of the present day. Carbonate carbon isotope records of the period immediately following the main stage of ice sheet development reveal a major perturbation in the carbon system, represented by the positive d13C excursion known as carbon maximum 6 ("CM6"), which has traditionally been interpreted as reflecting increased burial of organic matter and atmospheric pCO2 drawdown. More recently, it has been suggested that the d13C excursion records a negative feedback resulting from the reduction of silicate weathering and an increase in atmospheric pCO2. Here we present high-resolution multi-proxy (alkenone carbon and foraminiferal boron isotope) records of atmospheric carbon dioxide and sea surface temperature across CM6. Similar to previously published records spanning this interval, our records document a world of generally low (~300 ppm) atmospheric pCO2 at a time generally accepted to be much warmer than today. Crucially, they also reveal a pCO2 decrease with associated cooling, which demonstrates that the carbon burial hypothesis for CM6 is feasible and could have acted as a positive feedback on global cooling. STUDY NOTES: Paleo-CO2 derived from boron isotope measurements on planktonic foraminifera samples from the Middle Miocene Blue Clay Formation of Malta (sampled at Ras il-Pellegrin), contributed to the Paleo-pCO2 Database.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/badger2013boron.xlsx Excel File; Malta Middle Miocene Boron Isotope and CO2 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/badger2013boron.txt NOAA Template File; Malta Middle Miocene Boron Isotope and CO2 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11