Now showing items 1-12 of 12

    • A detection of Milankovitch frequencies in global volcanic activity 

      Kutterolf, Steffen; Jegen, Marion; Mitrovica, Jerry; Kwasnitschka, Tom; Freundt, Armin; Huybers, Peter John (Geological Society of America, 2013)
      A rigorous detection of Milankovitch periodicities in volcanic output across the Pleistocene-Holocene ice age has remained elusive. We report on a spectral analysis of a large number of well-preserved ash plume deposits ...
    • Earth rotation changes since ?500 CE driven by ice mass variations 

      Hay, Carling; Mitrovica, Jerry; Morrow, Eric; Kopp, Robert E.; Huybers, Peter John; Alley, Richard B. (Elsevier BV, 2016)
      We predict the perturbation to the Earth's length-of-day (LOD) over the Common Era using a recently derived estimate of global sea-level change for this time period. We use this estimate to derive a time series of “clock ...
    • An enigma in estimates of the Earth's dynamic ellipticity 

      Morrow, E; Mitrovica, Jerry; Forte, A.M.; Glišović, P; Huybers, Peter John (Oxford University Press, 2012)
      The precession and obliquity frequencies of the Earth’s rotational motion are functions of the dynamic ellipticity of the Earth’s gravitational figure, and this connection has provided a novel bridge between studies of ...
    • Estimates of Land Ice Changes from Sea Level and Gravity Observations 

      Morrow, Eric (2014-06-06)
      Understanding how global ice volume on the Earth has changed is of significant importance to improving our understanding of the climate system. Fortunately, the geographically unique perturbations in sea level that result ...
    • Evolution of a Coupled Marine Ice Sheet–Sea Level Model 

      Gomez, Natalya Alissa; Pollard, David; Mitrovica, Jerry; Huybers, Peter John; Clark, Peter U. (American Geophysical Union, 2012)
      We investigate the stability of marine ice sheets by coupling a gravitationally self-consistent sea level model valid for a self-gravitating, viscoelastically deforming Earth to a 1-D marine ice sheet-shelf model. The ...
    • Ice Stream Variability and Links to Climate 

      Robel, Alexander Abram (2015-09-22)
      This dissertation explores the variability and climatic importance of ice streams, regions of fast flow in ice sheets. Observations indicate that ice stream variability plays an important role in the current mass balance ...
    • Imprints of Geodynamic Processes on the Paleoclimate Record 

      Austermann, Jacqueline (2016-05-18)
      In this thesis I investigate how solid Earth deformation associated with glacial isostatic adjustment and mantle convection impacted ice age climate. In particular, I discard approximations that treat the Earth's internal ...
    • Multiple Sulfur Isotope Applications in Diagenetic Models and Geochemical Proxy Records 

      Masterson, Andrew Laurence (2016-09-09)
      Many of the long-term geochemical fluxes influencing the surface sulfur cycle are microbially catalyzed and a substantial portion of active S cycling occurs in organic-rich continental margin sediments. Stable S isotopes ...
    • On Sea Level - Ice Sheet Interactions 

      Gomez, Natalya Alissa (2014-02-25)
      This thesis focuses on the physics of static sea-level changes following variations in the distribution of grounded ice and the influence of these changes on the stability and dynamics of marine ice sheets. Gravitational, ...
    • Sea level as a stabilizing factor for marine-ice-sheet grounding lines 

      Gomez, Natalya Alissa; Mitrovica, Jerry; Huybers, Peter John; Clark, Peter U. (Springer Nature, 2010)
      Climate change could potentially destabilize marine ice sheets, which would affect projections of future sea-level rise1, 2, 3, 4. Specifically, an instability mechanism5, 6, 7, 8 has been predicted for marine ice sheets ...
    • Stability of Planetary Rotation 

      Chan, Ngai Ham (2014-06-06)
      This thesis focuses on the long-term rotational stability of the Earth and terrestrial planets. One important class of perturbation is a reorientation of the solid planet with respect to a rotation pole that remains fixed ...
    • A statistical analysis of the correlation between large igneous provinces and lower mantle seismic structure 

      Austermann, Jacqueline; Kaye, Bryan; Mitrovica, Jerry; Huybers, Peter John (Oxford University Press (OUP), 2014)
      Large igneous provinces (LIPs) lie approximately above the margins of the African and Pacific large low shear velocity provinces (LLSVPs) in the deep mantle. This spatial correlation has been used to argue that plumes are ...