Oregon State University

College of Earth, Ocean, and Atmospheric Sciences

Directory of People

Sophie-Bernice Wilmes

Research Associate (Postdoc)
Discipline: Physics of Oceans and Atmospheres
Office: Burt 262
Phone: 541-737-2467
Email: swilmes@coas.oregonstate.edu

Specialty

Tide modelling, Climate Modelling, Physical Oceanography

Research Interests

Tidal dynamics

Climate modelling

Global MOC

Past and future sea-level change

Climate variability

LGM climate

Current Research

Modelling the impact of tidal changes on the Last Glacial Maximum Overturning Circulation

PI: Andreas Schmittner, Co-PI: Gokhan Danabasoglu, Project Partners: Mattias Green, Nancy Norton, David Ullman

The ~130m sea level drop during the Last Glacial Maximum (LGM) altering the shape of the ocean basins, may have considerably increased tidal dissipation in the deep ocean during the LGM. The increases in tidal energy available for mixing in the ocean may have strengthened the meridional overturning circulation (MOC), counteracting the buoyancy forcing weakening the MOC during the LGM. Aspects of LGM tidal dynamics are investigated using a tide model which has been set up with different tidal conversion parameterisations, and different LGM bathymetry reconstructions are compared. The results from these simulations are used to force the intermediate complexity climate model UVic in order to simulate the impacts of changes in tidally driven mixing on the large-scale ocean circulation and investigate the importance of changes in the tides for the MOC during the LGM. Currently, a selection of these experiments is being repeated with the global climate model CESM. This research my have far-reaching implications for paleo-climate modelling, suggesting that changes in the tides should be taken into account for the modelling and reconstruction of past climatic periods.

See also http://people.oregonstate.edu/~schmita2/Projects/LGM_tides/

Education

2012 – 2016    PhD Physical Oceanography, School of Ocean Sciences, Bangor University, UK

Thesis Title:The Impacts of Large-Scale Sea Level Changes on the Tides

Supervisors: Dr. J. A. M. Green and Prof. J. D. Scourse

2009 – 2011   MSc. Climate Sciences, University of Bern, CH; Focus: Climate Variability, Climate Physics

Thesis Title: Climate Variability in the Mid and High Latitudes of the Southern Hemisphere in Ensemble Simulations from 1500 to 2000 AD

Supervisors: PD Dr. C. C. Raible, Prof. T. F. Stocker

2006 – 2009   BSc. Ocean Sciences, University of Wales, Bangor, UK; Focus: Physical Oceanography, Paleoclimatology

Dissertation Title: ‘Solar forcing of Holocene climate change at centennial to millennial timescales: A modelling study’

Supervisors: Prof. T. P. Rippeth, Prof. M. Schulz

1997 – 2006    Abitur, Kopernikusschule Freigericht, Germany

Publications

Wilmes, S.-B., Green, J. A. M., Gomez, N., Rippeth, T. P., and Lau, H. (2017), Global marine impacts of large-scale ice sheet collapses, J. Geophy. Res. Oceans., in press.

Wilmes, S.-B., Schmittner, A. and Green, M. (2017), Simulating the impacts of changes in tidal dissipation on LGM ocean circulation, in preparation.

Carless, S. J., Green, J. A. M., Pelling, H. P. and Wilmes, S.-B. (2016), Effects of future sea-level rise on tidal processes on the Patagonian Shelf, Journal of Marine Systems, 163, 113-124, https://doi.org/10.1016/j.jmarsys.2016.07.007.

Schmittner, A., Green, J. A. M. and Wilmes, S.-B. (2015), Glacial ocean over-turning intensified by tidal mixing in a global circulation model, Geophys. Res. Let., 42, 4014-4022, doi: 10.1002/2015GL063561..

Wilmes, S.-B., and Green, J. A. M. (2014), The evolution of tides and tidal dissipation over the past 21,000 years, J. Geophys. Res. Oceans, 119, 4083-4100, doi:10.1002/2013JC009605.

Wilmes, S. B., Raible, C. C., and Stocker, T. F. (2012), Climate variability of the mid- and high-latitudes of the Southern Hemisphere in ensemble simulations from 1500 to 2000 AD, Clim. Past, 8, 373-390, doi: 10.5194/cp-8-373-2012.

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