Paleo-pCO2 Database Cenozoic Stomatal CO2 Data Royer, D. Royer, D. earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,stratigraphic level) earth science/paleoclimate/climate forcing (number of samples,null,null,count,null,climate forcing,null,null,N,number of leaves per sample) earth science/paleoclimate/climate forcing (carbon dioxide,null,unspecified margin of error,parts per million,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,how was age determined) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,modern calibration species) earth science/paleoclimate/climate forcing (sample identification,null,null,null,null,climate forcing,null,null,C,sample name) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,sample repository) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,location of collection) earth science/paleoclimate/climate forcing (age,null,null,million years ago,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (longitude,null,null,degree east,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,person who entered data) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,year specimen originally collected) earth science/paleoclimate/climate forcing (carbon dioxide,null,unspecified error lower bound,parts per million,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,CO2 type) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,what is the uncertainty range?) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,family) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,source herbarium) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,geologic formation) earth science/paleoclimate/climate forcing (age,null,unspecified error upper bound,million years ago,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,age scale) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,counting method) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,modern calibration regression equation) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,date of data entry) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,genus) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,herbarium sample) earth science/paleoclimate/climate forcing (carbon dioxide,null,unspecified error upper bound,parts per million,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (number of samples,null,null,count,null,climate forcing,null,null,N,number of trees per sample) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,species) earth science/paleoclimate/climate forcing (age,null,unspecified error lower bound,million years ago,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,calibration error) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,doi) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,greenhouse experiment) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,general notes) earth science/paleoclimate/climate forcing (number of samples,null,null,count,null,climate forcing,null,null,N,number of leaves comprising CO2 estimate) earth science/paleoclimate/climate forcing (carbon dioxide,null,null,parts per million,null,climate forcing,null,null,N,reported mean CO2) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,counting box dimensions (micrometer by micrometer)) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,what is the distribution of uncertainties?) earth science/paleoclimate/climate forcing (notes,null,null,null,null,climate forcing,null,null,C,citation) earth science/paleoclimate/climate forcing (latitude,null,null,degree north,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (Global>LATITUDE >LONGITUDE ) Understanding the link between the greenhouse gas carbon dioxide (CO2) and Earth's temperature underpins much of paleoclimatology and our predictions of future global warming. Here, we use the inverse relationship between leaf stomatal indices and the partial pressure of CO2 in modern Ginkgo bilobaand Metasequoia glyptostroboides to develop a CO2 reconstruction based on fossil Ginkgo and Metasequoia cuticles for the middle Paleocene to early Eocene and middle Miocene. Our reconstruction indicates that CO2 remained between 300 and 450 parts per million by volume for these intervals with the exception of a single high estimate near the Paleocene/Eocene boundary. These results suggest that factors in addition to CO2 are required to explain these past intervals of global warmth. STUDY NOTES: Paleo-CO2 data derived from fossil Ginkgo and Metasequoia leaf stomata measurements, from Royer et al. 2001 and Beerling et al. 2002, contributed to the Paleo-pCO2 Database. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Royer, D. 2017-12-17 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23251 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata-calib.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata-calib.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata-calib.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata-calib.xlsx English https://www.ncdc.noaa.gov/paleo/study/23251 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata-calib.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/royer2001stomata-calib.xlsx Dana L. Royer, Scott L. Wing, David J. Beerling, David W. Jolley, Paul L. Koch, Leo J. Hickey, Robert A. Berner2001Paleobotanical Evidence for Near Present-Day Levels of Atmospheric CO2 During Part of the TertiaryScience29255252310-231310.1126/science.292.5525.2310http://science.sciencemag.org/content/292/5525/2310 D.J. Beerling, B.H. Lomax, D.L. Royer, G.R. Upchurch, Jr., and L.R. Kump2002An atmospheric pCO2 reconstruction across the Cretaceous-Tertiary boundary from leaf megafossilsProceedings of the National Academy of Sciences99127836-784010.1073/pnas.122573099http://www.pnas.org/content/99/12/7836 START YEAR: 65400000 cal yr BP * END YEAR: 15200000 cal yr BP -180 -90 180 90