Now showing items 1-5 of 5

  • A long-term context (931–2005 C.E.) for rapid warming over Central Asia 

    Davi, Nicole K.; D'Arrigo, Rosanne; Jacoby, G. C.; Cook, E. R.; Anchukaitis, Kevin J.; Nachin, B.; Rao, M. P.; Leland, C. (2014-11)
    Warming over Mongolia and adjacent Central Asia has been unusually rapid over the past few decades, particularly in the summer, with surface temperature anomalies higher than for much of the globe. With few temperature ...
  • 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 ...