Paleocene-Eocene Thermal Maximum(~55MyrBP) Isotope and Mg/Ca Data Tripati, A.K.; Elderfield, H. Tripati, A.K. Elderfield, H. earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,benthic foraminifer,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP1209B>LATITUDE 32.65>LONGITUDE 158.5) (ODP 865C>LATITUDE 18.440167>LONGITUDE -179.555667) (DSDP 527>LATITUDE -28.03>LONGITUDE 1.77) A rapid increase in greenhouse gas levels is thought to have fueled global warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal magnesium/calcium ratios indicate that bottom waters warmed by 4 to 5C, similar to tropical and subtropical surface ocean waters, implying no amplification of warming in high-latitude regions of deep-water formation under ice-free conditions. Intermediate waters warmed before the carbon isotope excursion, in association with downwelling in the North Pacific and reduced Southern Ocean convection, supporting changing circulation as the trigger for methane hydrate release. A switch to deep convection in the North Pacific at the PETM onset could have amplified and sustained warming. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Tripati, A.K. Investigator : Elderfield, H. 2005-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2637 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tripati2005b https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/dsdp527-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1209b-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp865c-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tripati2005b https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/dsdp527-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1209b-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp865c-tab.txt English https://www.ncdc.noaa.gov/paleo/study/2637 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/tripati2005b https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/dsdp527-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1209b-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp865c-tab.txt Tripati, A. and H. Elderfield. 2005. Deep-Sea Temperature and Circulation Changes at the Paleocene-Eocene Thermal Maximum. Science, Vol. 308, pp. 1894. START YEAR: 55850000 14C yr BP * END YEAR: 55187000 14C yr BP -179.555667 -28.03 158.5 32.65