noaa-forcing-23570 Paleo-pCO2 Database Wyoming Early Eocene Paleosol CO2 Data Hyland, E.G.; Sheldon, N.D. Paleo-pCO2 Database Wyoming Early Eocene Paleosol CO2 Data 2018-03-09 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/23570 Investigator E.G. Hyland Investigator N.D. Sheldon earth science paleoclimate climate reconstructions precipitation,null,null,millimeter per year,annual,climate reconstructions,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 paleosol measurements earth science paleoclimate climate forcing carbon dioxide,bulk atmosphere,97.5% confidence interval margin of error,parts per million,null,climate forcing,null,null,N,based on paleosol measurements earth science paleoclimate climate forcing carbon dioxide,bulk atmosphere,unspecified margin of error,parts per million,null,climate forcing,null,null,N,based on paleosol measurements earth science paleoclimate climate reconstructions temperature,delta 18O,null,degree Celsius,null,climate reconstructions,null,null,N,temperature of paleosol calcium carbonate formation earth science paleoclimate climate forcing|climate reconstructions age,null,null,million years ago,null,climate forcing|climate reconstructions,null,null,N,null earth science paleoclimate climate forcing carbon dioxide geoscientificInformation 52000000 cal yr BP 50500000 cal yr BP Complete 42.2179 43.5057 -109.5372 -108.5307 Continent North America United States Of America Wyoming Green River Basin>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 Ethan G. Hyland, Nathan D. Sheldon 2013 Palaeogeography, Palaeoclimatology, Palaeoecology 369 125-135 10.1016/j.palaeo.2012.10.011 https://www.sciencedirect.com/science/article/pii/S0031018212005792 Ethan Hyland, Nathan D. Sheldon, Majie Fan 2013 Geological Society of America Bulletin 125 7-8 1338-1348 10.1130/B30761.1 https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/125/7-8/1338/125967/terrestrial-paleoenvironmental-reconstructions

The Early Eocene Climatic Optimum (EECO) has been characterized as a prolonged warm event indicated by increased atmospheric pCO2, temperatures, precipitation, and biological turnover. A new paleoenvironmental reconstruction using integrated pedological, geochemical, and isotopic data from the Green River Basin (Green River/Great Divide region) provides a high-resolution record of environmental and climatic change throughout the EECO. Our reconstruction indicates that this region, and likely much of the margin of paleolake Gosiute, was a stable, fluvially-controlled floodplain environment with evidence of large scale continuous soil development and features comparable with modern Alfisols (temperate forest soils). Regional climate data from multiple proxies indicates that the period was warm-temperate and semi-arid to sub-humid, with a peak interval from about 51.5-50.9 Ma that exhibits significantly warmer (~ 7C) and wetter (~ 750 mm yr-1) conditions, resulting in major changes to the local weathering regime. Isotopic analyses also indicate a rapid increase to high atmospheric pCO2 values (~ 1700 ppmV) and a shift in the d13C composition of pedogenic carbonates during this peak interval that appear to define and provide a cause for this significant regional response to global climatic change. The new data, when combined with foraminiferal d13C records, are consistent with CO2 ventilation from a deep marine reservoir source. This multi-proxy reconstruction suggests that the EECO may have had a superimposed "peak" of climatic and ecological change on land. STUDY NOTES: Paleo-CO2 derived from Eocene paleosols from the Wind River and Wasatch formations in Wyoming, USA, contributed to the Paleo-pCO2 Database

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.txt NOAA Template File; Wyoming Early Eocene Paleosol CO2 Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.xlsx Excel File; Wyoming Early Eocene Paleosol CO2 Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11