{"NOAAStudyId":"26152","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2019-02-07","dataPublisher":"NOAA","dataType":"CLIMATE FORCING","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/climate-forcing","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-forcing-26152.xml","doi":null,"earliestYearBP":27260000,"earliestYearCE":-27258050,"entryId":"noaa-forcing-26152","funding":[],"investigators":"Tesfamichael, T.; Royer, D.","mostRecentYearBP":21700000,"mostRecentYearCE":-21698050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/26152","originalSource":null,"publication":[{"abstract":"Recent variations in the concentration of atmospheric carbon dioxide ([CO2]atm) have been shown to affect carbon fixation during photosynthesis and are correlated with anatomical and physiological changes observed in leaves of woody dicots. These include changes in stomatal frequency and size and in d13C values. These attributes can be measured on organically preserved leaf fossils, and therefore can be used as proxies for Earth's atmospheric CO2 history. This study tests the link between [CO2]atm and global temperature for the late Oligocene and early Miocene using fossil leaves collected from Ethiopia, by estimating [CO2]atm using a leaf gas exchange model. The results of this study show a statistically significant [CO2]atm rise from ~390 ppm in the late Oligocene to ~870 ppm in the early Miocene. These values demonstrate a positive correlation between [CO2]atm and global average temperature, contrary to some previous studies for this time interval. The results of this study have important implications for understanding future climate change driven by rising [CO2]atm.","author":{"name":"Tekie Tesfamichael, Bonnie Jacobs, Neil Tabor, Lauren Michel, Ellen Currano, Mulugeta Feseha, Richard Barclay, John Kappelman, Mark Schmitz"},"citation":"Tekie Tesfamichael, Bonnie Jacobs, Neil Tabor, Lauren Michel, Ellen Currano, Mulugeta Feseha, Richard Barclay, John Kappelman, Mark Schmitz. 2017. Settling the issue of \"decoupling\" between atmospheric carbon dioxide and global temperature: [CO2]atm reconstructions across the warming Paleogene-Neogene divide. Geology, 45(11), 999-1002. doi: 10.1130/G39048.1","edition":null,"identifier":{"id":"10.1130/G39048.1","type":"doi","url":"http://dx.doi.org/10.1130/G39048.1"},"issue":"11","journal":"Geology","pages":"999-1002","pubRank":"1","pubYear":2017,"reportNumber":null,"title":"Settling the issue of \"decoupling\" between atmospheric carbon dioxide and global temperature: [CO2]atm reconstructions across the warming Paleogene-Neogene divide","type":"publication","volume":"45"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"57830","geo":{"geoType":"Feature","geometry":{"coordinates":["12.51","37.12"],"type":"POINT"},"properties":{"easternmostLongitude":"37.12","maxElevationMeters":null,"minElevationMeters":null,"northernmostLatitude":"12.51","southernmostLatitude":"12.51","westernmostLongitude":"37.12"}},"locationName":"Continent>Africa>Eastern Africa>Ethiopia","mappable":"Y","paleoData":[{"NOAADataTableId":"38095","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>climate forcing>carbon dioxide"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/tesfamichael2017stomata_franks.txt","linkText":"Oligocene/Miocene Stomata CO2 Data","urlDescription":"NOAA Template File","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>climate forcing>carbon dioxide"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/tesfamichael2017stomata_franks.xlsx","linkText":"Oligocene/Miocene Stomata CO2 Data","urlDescription":"Excel File","variables":[]}],"dataTableName":"Tesfamichael2017stomata_Franks","dataTableNotes":null,"earliestYear":27260000,"earliestYearBP":27260000,"earliestYearCE":-27258050,"mostRecentYear":21700000,"mostRecentYearBP":21700000,"mostRecentYearCE":-21698050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"Chilga"}],"studyCode":null,"studyName":"Paleo-pCO2 Database Oligocene/Miocene Stomata CO2 Data","studyNotes":"Stomata Paleo-CO2 data from Tesfamichael et al. 2017, contributed to the Paleo-pCO2 Database","version":"1.0","xmlId":"65095"}