Now showing items 1-4 of 4

  • A multiple proxy and model study of Cretaceous upper ocean temperatures and atmospheric CO2 concentrations 

    Bice, Karen L.; Birgel, Daniel; Meyers, Philip A.; Dahl, Kristina A.; Hinrichs, Kai-Uwe; Norris, Richard D. (American Geophysical Union, 2006-04-08)
    We estimate tropical Atlantic upper ocean temperatures using oxygen isotope and Mg/Ca ratios in well-preserved planktonic foraminifera extracted from Albian through Santonian black shales recovered during Ocean Drilling ...
  • Partitioning of strontium between calcite and fluid 

    Gabitov, R. I.; Watson, E. B. (American Geophysical Union, 2006-11-07)
    The Sr/Ca ratio of biogenic carbonate is widely used as a proxy for paleotemperature. This application is supported by empirical calibrations of Sr/Ca as a function of temperature, but it is also known that Sr uptake in ...
  • A secondary ionization mass spectrometry calibration of Cibicidoides pachyderma Mg/Ca with temperature 

    Curry, William B.; Marchitto, Thomas M. (American Geophysical Union, 2008-04-04)
    An evaluation of C. pachyderma Mg/Ca using a new suite of warm water multicores from the Florida Straits shows that the slope of Mg/Ca with temperature is shallower than previously thought. Using secondary ionization mass ...
  • Western Arctic Ocean temperature variability during the last 8000 years 

    Farmer, Jesse R.; Cronin, Thomas M.; de Vernal, Anne; Dwyer, Gary S.; Keigwin, Lloyd D.; Thunell, Robert C. (American Geophysical Union, 2011-12-17)
    We reconstructed subsurface (∼200–400 m) ocean temperature and sea-ice cover in the Canada Basin, western Arctic Ocean from foraminiferal δ18O, ostracode Mg/Ca ratios, and dinocyst assemblages from two sediment core records ...