noaa-ocean-14568 North Atlantic DSDP545 Mid-Cretaceous Biomarker SST and Carbon Model Data McAnena, A.; Flögel, S.; Hofmann, P.; Herrle, J.O.; Griesand, A.; Pross, J.; Talbot, H.M.; Rethemeyer, J.; Wallmann, K.; Wagner, T. North Atlantic DSDP545 Mid-Cretaceous Biomarker SST and Carbon Model Data 2013-06-16 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/14568 Investigator A. McAnena Investigator S. Flögel Investigator P. Hofmann Investigator J.O. Herrle Investigator A. Griesand Investigator J. Pross Investigator H.M. Talbot Investigator J. Rethemeyer Investigator K. Wallmann Investigator T. Wagner earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,Core earth science paleoclimate climate forcing|paleoclimatic modeling carbon dioxide,null,null,parts per million,null,climate forcing|paleoclimatic modeling,null,null,N,model earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on GDGT2 earth science paleoclimate paleoclimatic modeling delta 13C,calcium carbonate,null,per mil PDB,null,paleoclimatic modeling,null,null,N,model earth science paleoclimate paleoceanography depth,null,null,meter,null,paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on TEX86 earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,glycerol dialkyl glycerol tetraether index,one standard deviation,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on GDGT2 earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,glycerol dialkyl glycerol tetraether index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on GDGT1 earth science paleoclimate paleoclimatic modeling age,null,null,million years ago,null,paleoclimatic modeling,null,null,N,null earth science paleoclimate paleoceanography organic carbon,null,null,percent,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 13C,calcium carbonate,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography tetraether index of 86 carbon atoms,null,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography identified coccolithophore,null,null,percent,null,paleoceanography,null,null,N,Nannoconids? Incompta? earth science paleoclimate paleoceanography delta 13C,organic matter,null,per mil PDB,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography glycerol dialkyl glycerol tetraether,null,one standard deviation,dimensionless,null,paleoceanography,null,null,N,1 tetraethers earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,glycerol dialkyl glycerol tetraether index,one standard deviation,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,based on GDGT1 earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,DSDP Leg earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,Section earth science paleoclimate paleoceanography depth at sample start,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography glycerol dialkyl glycerol tetraether,null,null,dimensionless,null,paleoceanography,null,null,N,1 tetraethers earth science paleoclimate paleoceanography branched and isoprenoid tetraether index,null,null,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography notes,null,null,null,null,paleoceanography,null,null,N,DSDP Site earth science paleoclimate paleoceanography identified coccolithophore,null,null,percent,null,paleoceanography,null,null,N,Repagulum parvidentatum earth science paleoclimate paleoceanography glycerol dialkyl glycerol tetraether,null,null,dimensionless,null,paleoceanography,null,null,N,2 tetraethers earth science paleoclimate paleoceanography glycerol dialkyl glycerol tetraether,null,one standard deviation,dimensionless,null,paleoceanography,null,null,N,2 tetraethers earth science paleoclimate paleoclimatic modeling organic carbon,sediment,null,teramole,null,paleoclimatic modeling,null,null,N,model of organic carbon burial earth science paleoclimate paleoceanography depth at sample end,null,null,centimeter,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography identified coccolithophore,null,null,percent,null,paleoceanography,null,null,N,Nannoconus sp. earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean carbon isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation carbon cycle 121000000 cal yr BP 111000000 cal yr BP Complete 33.6643 33.6643 -9.3647 -9.3647 -3142 -3142 Ocean Atlantic Ocean North Atlantic Ocean DSDP 545>LATITUDE 33.6643>LONGITUDE -9.3647 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 A. McAnena, S. Flögel, P. Hofmann, J.O. Herrle, A. Griesand, J. Pross, H.M. Talbot, J. Rethemeyer, K. Wallmann, and T. Wagner. 2013. Atlantic cooling associated with a marine biotic crisis during the mid-Cretaceous period. Nature Geoscience, DOI: 10.1038/ngeo1850

Most of the marine biotic crises that occurred during the hot Mesozoic era have been linked to episodes of extreme warmth. Others, however, may have occurred during cooler intervals that interrupted Cretaceous greenhouse warmth. There are some indications of cooling in the late Aptian (116-114 Myr ago), but it has not been definitively linked to biotic crisis. Here we assess the timing and magnitude of late Aptian cooling and its association with biotic crises using a suite of geochemical and micropalaeontological assessments from a marine sediment core from the North Atlantic Ocean as well as global biogeochemical modelling. Sea surface temperatures derived from the TEX86 proxy suggest that surface waters cooled by about 5°C during the two million years, coincident with a positive d13C excursion of approximately 2 per mil in carbonates and organic carbon. Surface productivity was enhanced during this period, but the abundance of planktonic foraminifera and nannoconid phytoplankton declined. Our simulations with a biogeochemical model indicate that the d13C excursion associated with the cooling could be explained by the burial of about 812,000 gigatons of carbon over 2.5 million years. About 50% of the this carbon burial occurred in the Atlantic, Southern and Tethys ocean basins. We conclude that global cooling during greenhouse conditions can cause perturbations to marine ecosystems and biogeochemical cycles at scales comparable to those associated with global warming. STUDY NOTES: Mid-Cretaceous (121 - 111 ma) Total Organic Carbon and Carbon burial flux data, plus pCO2 and carbon burial model

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcanena2013/mcanena2013model.txt GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/mcanena2013/mcanena2013geochem.txt USA/NOAA DIF Version 9.8.4 2019-01-29 2019-01-29