Now showing items 1-8 of 8

    • Geophysical and petrological constraints on ocean plate dynamics 

      Sarafian, Emily K. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2017-06)
      This thesis investigates the formation and subsequent motion of oceanic lithospheric plates through geophysical and petrological methods. Ocean crust and lithosphere forms at mid-ocean ridges as the underlying asthenosphere ...
    • 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 preliminary 1-D model investigation of tidal variations of temperature and chlorinity at the Grotto mound, Endeavour Segment, Juan de Fuca Ridge 

      Xu, Guangyu; Larson, Benjamin I.; Bemis, Karen G.; Lilley, Marvin D. (John Wiley & Sons, 2017-01-18)
      Tidal oscillations of venting temperature and chlorinity have been observed in the long-term time series data recorded by the Benthic and Resistivity Sensors (BARS) at the Grotto mound on the Juan de Fuca Ridge. In this ...
    • 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 ...
    • Twentieth century warming of the tropical Atlantic captured by Sr-U paleothermometry 

      Alpert, Alice; Cohen, Anne L.; Oppo, Delia W.; DeCarlo, Thomas M.; Gaetani, Glenn A.; Hernandez-Delgado, Edwin A.; Winter, Amos; Gonneea, Meagan E. (John Wiley & Sons, 2017-02-16)
      Coral skeletons are valuable archives of past ocean conditions. However, interpretation of coral paleotemperature records is confounded by uncertainties associated with single-element ratio thermometers, including Sr/Ca. ...
    • 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 ...