Paleo-pCO2 Database Wyoming Early Eocene Paleosol CO2 Data Hyland, E.G.; Sheldon, N.D. Hyland, E.G. Sheldon, N.D. 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 (Green River Basin>LATITUDE >LONGITUDE ) 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 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hyland, E.G. Investigator : Sheldon, N.D. 2018-03-09 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23570 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.xlsx https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.xlsx English https://www.ncdc.noaa.gov/paleo/study/23570 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/hyland2013paleosol.xlsx Ethan G. Hyland, Nathan D. Sheldon2013Coupled CO2-climate response during the Early Eocene Climatic OptimumPalaeogeography, Palaeoclimatology, Palaeoecology369125-13510.1016/j.palaeo.2012.10.011https://www.sciencedirect.com/science/article/pii/S0031018212005792 Ethan Hyland, Nathan D. Sheldon, Majie Fan2013Terrestrial paleoenvironmental reconstructions indicate transient peak warming during the early Eocene climatic optimumGeological Society of America Bulletin1257-81338-134810.1130/B30761.1https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/125/7-8/1338/125967/terrestrial-paleoenvironmental-reconstructions START YEAR: 52000000 cal yr BP * END YEAR: 50500000 cal yr BP -109.5372 42.2179 -108.5307 43.5057