Premelting and phase changes in porous media; mechanics and physics of ice and glaciers; gas hydrates and submarine slope stability; strength evolution along faults; pore-fluid interactions; deformation and failure of granular materials in seismic and surficial processes.
Links to: a biographical sketch, publications, and current courses (Spring 2014: Geology 110: People, Rocks, and Fire).
is directed towards understanding the fundamental interactions that govern a broad spectrum of natural processes. Much of this work centers on the fluid mechanics, solid mechanics and thermodynamics that control interactions between solids and fluids, especially near the melting transition. I am particularly interested in problems that span a range of length and time scales, often motivating the development of homogenized models to translate from the microscopic distances over which the controlling physical interactions operate, to the much larger scales at which their effects are observed. Current work is focused on solid-fluid interactions along faults during earthquakes and slow-slip events; the controls on glacier sliding that result in sediment entrainment and landscape evolution; the development of gas hydrate anomalies and their implications for submarine slope stability and pockmark formation; multiphase shear and transitions between distributed (viscous) and localized (frictional) deformation mechanisms; segregation and transport processes during solidification and melting in porous media on Earth and Mars; and passive strategies for thermal storage and timed heat release in the built environment (in collaboration with Alexandra Rempel
Current Research Group Members:
- Alexander Handwerger, PhD (co-advised with Josh Roering): dynamics of earthflows (see Handwerger et al., 2013), gas hydrates and submarine landslides (see Handwerger and Rempel, 2014).
- Julia Irizarry, MSc: phase equilibria in porous media and the development of gas hydrate anomalies (see Irizarry and Rempel, 2014).
- Rob Skarbek, PhD (co-advised with David Schmidt): evolution of pore pressure along subduction zones (see Skarbek and Saffer, 2009), the dynamics of slow slip (see Skarbek et al., 2012), Coulomb-wedge modeling (see Skarbek et al., 2014).
- Brandon Vanderbeek, PhD (co-advised with Doug Toomey): full-waveform seismic tomography, submarine gas-escape features.
- Rempel, A. W. and B. A. Buffett, Formation and accumulation of gas hydrate in porous media, Journal of Geophysical Research - Solid Earth, 102, 10151-10164, 1997.
- Rempel, A. W. and B. A. Buffett, Mathematical models of gas hydrate accumulation, In: Gas Hydrates, Henriet, J.-P. and J. Mienert (eds.), Geological Society, London, Special Publications, 137, 63-74, 1998.
- Rempel, A. W. and M. G. Worster, The interaction between a particle and an advancing solidification front, Journal of Crystal Growth, 205, 427-440, 1999.
- Rempel, A.W. and M.G. Worster, Particle trapping at an advancing solidification front with interfacial-curvature effects, Journal of Crystal Growth, 223, 420-432, 2001.
- Rempel, A. W., E. D. Waddington, J. S. Wettlaufer and M. G. Worster, Possible displacement of the climate signal in ancient ice by premelting and anomalous diffusion, Nature, 411, 568-571, 2001.
- Rempel, A. W., J. S. Wettlaufer and M. G. Worster, Interfacial premelting and the thermomolecular force: thermodynamic buoyancy, Physical Review Letters, 87, 088501, 2001.
- Rempel, A. W., J. S. Wettlaufer and E. D. Waddington, Anomalous diffusion of multiple impurity species: predicted implications for the ice-core climate records, Journal of Geophysical Research - Solid Earth, 107,2330, doi:10.1029/2002JB001857, 2002.
- Rempel, A. W. and J. S. Wettlaufer,Segregation, transport and interaction of climate proxies in polycrystalline ice, Canadian Journal of Physics, 81, 89-97, 2003.
- Rempel, A. W. and J. S. Wettlaufer, Isotopic diffusion in polycrystalline ice, Journal of Glaciology,49, 397-406, 2003.
- Rempel, A. W., J. S. Wettlaufer and M. G. Worster, Premelting dynamics in a continuum model of frost heave, Journal of Fluid Mechanics, 498, 227-244, 2004.
- Rempel, A. W., Englacial phase changes and intergranular flow above subglacial lakes, Annals of Glaciology, 40, 191-194, 2005.
- Dash, J. G., A. W. Rempel and J. S. Wettlaufer, The physics of premelted ice and its geophysical consequences, Reviews of Modern Physics, 78(3), 695-741, 2006.
- Rempel, A. W. and J. R. Rice, Thermal pressurization and onset of melting in fault zones, Journal of Geophysical Research - Solid Earth, 111, B09314, doi:10.1029/2006JB004314, 2006.
- Rempel, A. W., The effects of flash-weakening and damage on the evolution of fault strength and temperature, AGU Monograph on Radiated Energy and the Physics of Earthquake Faulting, 263-270, 2006.
- Rempel, A. W., The formation of ice lenses and frost heave, Journal of Geophysical Research - Earth Surface, 112, F02S21, doi:10.1029/2006JF000525, 2007.
- Rempel, A. W., J. S. Wettlaufer and M. G. Worster, Comment on "A quantitative framework for interpretation of basal ice facies formed by ice accretion over subglacial sediment" by Poul Christoffersen et al., Journal of Geophysical Research - Earth Surface, 112, F02036, doi:10.1029/2006JF000701, 2007.
- Emerson, L. F. and A. W. Rempel, Thresholds in the sliding resistance of simulated basal ice, The Cryosphere, 1, 11-19, 2007.
- Rempel, A. W., A theory for ice–till interactions and sediment entrainment beneath glaciers, Journal of Geophysical Research - Earth Surface, 113, F01013, doi:10.1029/2007JF000870, 2008.
- Rempel, A. W. and S. L. Weaver, A model for flash weakening by asperity melting during high-speed earthquake slip, Journal of Geophysical Research - Solid Earth, 113, B11308, doi:10.1029/2008JB005649, 2008.
- Rempel, A. W., Effective stress profiles and seepage flows beneath glaciers and ice sheets, Journal of Glaciology, 55, 431-443, 2009.
- Rempel, A. W., Transient effective stress variations forced by changes in conduit pressure beneath glaciers and ice sheets, Annals of Glaciology, 50(52), 61-66, 2009.
- Belien, I. B., K. V. Cashman and A. W. Rempel, Gas accumulation in particle-rich suspensions and implications for bubble populations in crystal-rich magma, Earth and Planetary Science Letters, 297, 133-140, 2010.
- Rempel, A. W., Frost heave, Journal of Glaciology, 56(200), 1122-1128, 2010.
- Rempel, A. W., Microscopic and environmental controls on the spacing and thickness of segregated ice lenses, Quaternary Research, 75, 316-324, 2011.
- Rempel, A. W., A model for the diffusive growth of hydrate saturation anomalies in layered sediments, Journal of Geophysical Research - Solid Earth, 116, B10105, doi:10.1029/2011JB008484, 2011.
- Fauria, K. E. and A. W. Rempel, Gas invasion into water-saturated, unconsolidated porous media: Implications for gas hydrate reservoirs, Earth and Planetary Science Letters, 312, 188-193, 2011.
- Schneider, A., A. W. Rempel and K. V. Cashman, Conduit degassing and thermal controls on eruption styles at Mount St. Helens, Earth and Planetary Science Letters, 357-8, 347-354, 2012.
- Rempel, A.W., Hydro-mechanical processes in freezing soils (invited review), Vadose Zone Journal, 11, doi:10.2136/vzj2012.0045, 2012.
- Skarbek, R.M., A.W. Rempel and D.A. Schmidt, Geologic heterogeneity can produce aseismic slip transients, Geophysical Research Letters, 39, L21306, doi10.1029/2012GL053762, 2012.
- Rempel, A.R., A.W. Rempel, K.V. Cashman, K. Gates, C.J. Page and B. Shaw, Interpretation of passive solar field data with EnergyPlus models: Un-conventional wisdom from four sunspaces in Eugene, Oregon, Building and Environment, 60, 158-172, 2013.
- Rempel, A.R. and A.W. Rempel, Rocks, clays, water, and salts: Highly durable, infinitely rechargeable, eminently controllable thermal batteries for buildings, Geosciences, 3, 63-101, 2013.
- Booth, A.M., J. J. Roering and A.W. Rempel, Topographic signatures of deep-seated landslides and a general landscape evolution model, Journal of Geophysical Research - Earth Surface, 118, doi:10.1002/jgrf.20051, 2013.
- Saruya, T., K. Kurita and A.W. Rempel, Experimental constraints on the kinetics of ice lens initiation and growth, Physical Review E, 87, 032404, 2013.
- Chen, J. and A.W. Rempel, Progressive flash heating and the evolution of high-velocity rock friction,
Journal of Geophysical Research - Solid Earth, 119, doi:10.1002/2013JB010631, 2014.
- Sizemore, H.G., A.P. Zent and A.W. Rempel, Initiation and growth of Martian ice lenses, Icarus doi:10.1016/j.icarus.2014.04.013, in press.
- Saruya, T., K. Kurita, and A.W. Rempel, Indirect measurements of interfacial melting from macroscopic ice observations, Physical Review E, 89, 060501(R), 2014.
- Saruya, T., A.W. Rempel, and K. Kurita, Hydrodynamic transitions with changing particle size that control ice lens growth, Journal of Physical Chemistry B, doi:10.1021/jp505366y, in press.
- Andrew Schneider, MSc. 2009, thesis: Constraints on eruption dynamics, Mount St. Helens, WA, 2004-2008 (see Schneider et al., 2012)
- Kristen Fauria, BSc. 2010, honors thesis: Mechanisms of gas transport through sediment: Implications for the gas hydrate stability zone (see Fauria and Rempel, 2011).
- Laura van Alst, MSc. 2011, thesis: Laboratory experiments in cold temperature rock deformation (see Rempel and van Alst, BIOT-5, 2013).
- Sara Papamarcos, MSc. 2012, thesis: A model of basal hydrologic networks and effective stress beneath an ice sheet.
- Jiangzhi (Arthur) Chen, PhD 2014, thesis: Evolution of fault strength from microscopic asperity scale to macroscopic fault zone scale.
- Associate Professor, Department of Geological Sciences, University of Oregon, September 2009 - present.
- Assistant Professor, Department of Geological Sciences, University of Oregon, January 2005 - September 2009.
- Lecturer in Applied Mathematics, Division of Engineering and Applied Sciences, Harvard University, July 2003 - December 2004 (mentor Jim Rice).
- Postdoctoral Associate, Department of Geology and Geophysics, Yale University, July 2002 - June 2003 (mentor John Wettlaufer).
- Research Associate, Applied Physics Laboratory, University of Washington, June 2000 - June 2002 (mentor John Wettlaufer).
- Ph. D. (Applied Mathematics) University of Cambridge, 2000. Dissertation: The Dynamics of Premelted Films, with Geophysical Applications (advised by Grae Worster).
- M. Sc. (Geophysics) University of British Columbia, 1995. Dissertation: Theoretical and Experimental Investigations into the Formation and Accumulation of Gas Hydrates (advised by Bruce Buffett).
- B. A. Sc. (Engineering Physics) University of British Columbia, 1992.