noaa-forcing-23572 Paleo-pCO2 Database Southeast Germany Oligocene Stomata CO2 Data Roth-Nebelsick, A.; Oehm, C.; Grein, M.; Utescher, T.; Kunzmann, L.; Friedrich, J.-P.; Konrad, W. Paleo-pCO2 Database Southeast Germany Oligocene Stomata CO2 Data 2018-03-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23572 Investigator A. Roth-Nebelsick Investigator C. Oehm Investigator M. Grein Investigator T. Utescher Investigator L. Kunzmann Investigator J.-P. Friedrich Investigator W. Konrad earth science paleoclimate climate forcing age,null,null,million years ago,null,climate forcing,null,null,N,null earth science paleoclimate climate forcing carbon dioxide,bulk atmosphere,null,parts per million,null,climate forcing,null,null,N,based on stomatal measurements earth science paleoclimate climate forcing carbon dioxide geoscientificInformation 33450000 cal yr BP 23800000 cal yr BP Complete 51.12 51.48 12.31 14.59 Continent Europe Western Europe Germany Southeast Germany>LATITUDE >LONGITUDE 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 Anita Roth-Nebelsick, Christoph Oehm, Michaela Grein, Torsten Utescher, Lutz Kunzmann, Jan-Peter Friedrich, Wilfried Konrad 2014 Review of Palaeobotany and Palynology 206 1-9 10.1016/j.revpalbo.2014.03.001 https://www.sciencedirect.com/science/article/pii/S0034666714000359

Platanus neptuni (Ettingshausen) Buzek, Holy and Kvacek is a deciduous and preferentially azonal taxon of temperate to warm-temperate vegetation in Europe from the Late Eocene to the Late Miocene. The high fossilization potential of its leaves and easily identifiable stomata and epidermal cells make P. neptuni an excellent source of stomatal data that can be utilized as a CO2 proxy. Moreover, it was found in former studies that CO2 data based on stomatal frequency data of P. neptuni overlapped to a high degree with CO2 results which are provided by other, contemporaneous taxa. In this study, the stomatal CO2 signal of P. neptuni is expanded to include the early Oligocene and is analyzed in more detail with three aims: 1) to evaluate the CO2 signal of P. neptuni stomatal data, 2) to check SI and SD data of P. neptuni for consistency, and 3) to contribute additional terrestrial CO2 data to the Oligocene record. During the Oligocene, full scale Antarctic glaciation occurred, punctuated by various distinct glaciation events. There is evidence that Oligocene glaciation was coupled to atmospheric CO2 level. Presently, the main proxy sources for Oligocene CO2 levels are alkenones and boron-isotope data, both obtained from marine sediments. Since P. neptuni is an extinct taxon, CO2 was reconstructed by using an ecophysiological modeling approach to plant gas exchange which utilizes various other data in addition to stomatal density. Material was considered from sites which are dated to the following time intervals: early Oligocene - 33.9 to 32 Ma, late Oligocene - 27 to 26.2 Ma and 25.3 to 23 Ma, and latest Oligocene - around 24 Ma. Comparison of raw SI and SD data of P. neptuni revealed partially conflicting results, with the SD data indicating a decrease in CO2 from the early to the late Oligocene whereas SI data indicate an increase. In contrast, CO2 results calculated with the gas exchange model indicate relatively stable CO2 for the considered time intervals, with levels of about 400 ppm. The reconstructed CO2 data points are similar to other proxy data and are consistent with the general climate development during the Oligocene. STUDY NOTES: Paleo-CO2 derived from fossil plant stomata collected in southeast Germany, contributed to the Paleo-pCO2 Database.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/roth-nebelsick2014stomata.txt NOAA Template File; Southeast Germany Oligocene Stomata CO2 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/roth-nebelsick2014stomata.xlsx Excel File; Southeast Germany Oligocene Stomata CO2 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11