Now showing items 21-40 of 56

    • GRACE Gravity Data Constrain Ancient Ice Geometries and Continental Dynamics over Laurentia 

      Tamisiea, M. E.; Mitrovica, Jerry; Davis, J. L. (American Association for the Advancement of Science, 2007)
      The free-air gravity trend over Canada, derived from the Gravity Recovery and Climate Experiment ( GRACE) satellite mission, robustly isolates the gravity signal associated with glacial isostatic adjustment (GIA) from the ...
    • History of the Greenland Ice Sheet: paleoclimatic insights 

      Alley, Richard B.; Andrews, J. T.; Brigham-Grette, J.; Clarke, G. K. C.; Cuffey, K. M.; Fitzpatrick, J. J.; Funder, S.; Marshall, S. J.; Miller, G. H.; Mitrovica, Jerry; Muhs, D. R.; Otto-Bliesner, B. L.; Polyak, L.; White, J. W. C. (Elsevier, 2010)
      Paleoclimatic records show that the Greenland Ice Sheet consistently has lost mass in response to warming, and grown in response to cooling. Such changes have occurred even at times of slow or zero sea-level change, so ...
    • Hydrothermal iron flux variability following rapid sea level changes 

      Middleton, Jennifer L.; Langmuir, Charles H.; Mukhopadhyay, Sujoy; McManus, Jerry F.; Mitrovica, Jerry (American Geophysical Union, 2016)
    • 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 ...
    • Inferences of mantle viscosity based on ice age data sets: Radial structure 

      Lau, Harriet C. P.; Mitrovica, Jerry; Austermann, Jacqueline; Crawford, Ophelia; Al-Attar, David; Latychev, Konstantin (American Geophysical Union, 2016)
      We perform joint nonlinear inversions of glacial isostatic adjustment (GIA) data, including the following: postglacial decay times in Canada and Scandinavia, the Fennoscandian relaxation spectrum (FRS), late-Holocene ...
    • Influence of Bering Strait flow and North Atlantic circulation on glacial sea-level changes 

      Hu, Aixue; Meehl, Gerald A.; Otto-Bliesner, Bette L.; Waelbroeck, Claire; Han, Weiqing; Loutre, Marie-France; Lambeck, Kurt; Mitrovica, Jerry; Rosenbloom, Nan (Nature Research, 2010)
    • The Influence of True Polar Wander on Glacial Inception in North America 

      Daradich, A; Huybers, Peter; Mitrovica, Jerry; Chan, N; Austermann, J (Elsevier BV, 2017-03)
      The impact that long-term changes in Earth's rotation axis relative to the surface geography, or true polar wander (TPW), and continental drift have had in driving cooling of high-latitude North America since the Eocene ...
    • Land water storage within the Congo Basin inferred from GRACE satellite gravity data 

      Crowley, John W.; Mitrovica, Jerry; Bailey, Richard C.; Tamisiea, Mark E.; Davis, James L. (American Geophysical Union, 2006)
    • Large-Scale Mantle Structure Observed Through the Lens of Geodynamical Processes 

      Lau, Harriet Chung Pui (2017-04-24)
      This thesis aims to further our understanding of mantle dynamics by investigating two fundamental parameters that govern such motion: density and viscosity. The variation of mantle density and viscosity dictates the ...
    • Laurentide-Cordilleran Ice Sheet saddle collapse as a contribution to meltwater pulse 1A 

      Gomez, N.; Gregoire, L. J.; Mitrovica, Jerry; Payne, A. J. (American Geophysical Union, 2015)
      The source or sources of meltwater pulse 1A (MWP-1A) at similar to 14.5ka, recorded at widely distributed sites as a sea level rise of similar to 10-20m in less than 500years, is uncertain. A recent ice modeling study of ...
    • Mantle avalanche as a driving force for tectonic reorganization in the southwest Pacific 

      Pysklywec, R. N.; Mitrovica, Jerry; Ishii, M. (Elsevier, 2003)
      The mechanism responsible for the recent, dramatic reorganization of the tectonic plate boundary in the New Hebrides region of the southwest Pacific has remained elusive. We propose that an ongoing avalanche of cold, dense ...
    • Mechanics of Glacier Hydrology 

      Meyer, Colin R. (2017-08-31)
      Liquid water exists throughout the glacier system. At the surface of glaciers and ice sheets, liquid water is produced when the seasonal surface energy forcing warms the ice above its melting temperature. This meltwater ...
    • Mid-Pliocene shorelines of the US Atlantic Coastal Plain — An improved elevation database with comparison to Earth model predictions 

      Rovere, A.; Hearty, P. J.; Austermann, J.; Mitrovica, Jerry; Gale, J.; Moucha, R.; Forte, A. M.; Raymo, M. E. (Elsevier, 2015)
      For nearly a century, the Atlantic Coastal Plain (ACP) of the United States has been the focus of studies investigating Pliocene and Pleistocene shorelines, however, the mapping of paleoshorelines was primarily done by ...
    • 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 ...
    • Near-field hydro-isostasy: the implementation of a revised sea-level equation 

      Milne, G. A.; Mitrovica, Jerry; Davis, J. L. (Oxford University Press, 1999)
      We describe how the existing sea-level equation incorrectly predicts the change in sea level (and thus the ocean load) in ice-covered, subgeoidal geographic regions during periods of deglaciation. We go on to present a new ...
    • On postglacial sea level—III. Incorporating sediment redistribution 

      Dalca, A. V.; Ferrier, K. L.; Mitrovica, Jerry; Perron, J. T.; Milne, G. A.; Creveling, J. R. (Oxford University Press, 2013)
      We derive a generalized theory for gravitationally self-consistent, static sea level variations on earth models of arbitrary complexity that takes into account the redistribution of sediments. The theory is an extension ...
    • 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, ...
    • On the robustness of predictions of sea level fingerprints 

      Mitrovica, Jerry; Gomez, N.; Morrow, E.; Hay, C.; Latychev, K.; Tamisiea, M. E. (Oxford University Press, 2011)
      The rapid melting of the Earth's ice reservoirs will produce geographically distinct patterns of sea level change that have come to be known as sea level fingerprints. A basic, gravitationally self-consistent theory for ...
    • On the Time Scale Structure of Climate Variability and Response 

      Proistosescu, Cristian (2016-12-15)
      This thesis analyzes several aspects pertaining to the time scale structure of climate variability and the temperature response to external radiative forcing. The analysis begins with an examination of the structure of ...