MG53A:
Internal Waves/Tides and Sediment Processes on Continental Margins II


Session ID#: 37312

Session Description:
Enhanced bottom currents and turbulence generated by the interaction of internal waves/tides with the seafloor have been shown to influence sedimentation and generate nepheloid layers and sediment bedforms over continental slopes and within submarine canyons. Higher frequency internal waves in the form of nonlinear solitons, bores, and boluses can also resuspend and transport bottom sediment, particularly in shallow seas and on inner continental shelves. This session solicits abstracts focusing on how near-inertial, semi-diurnal and/or higher frequency internal waves drive sedimentation and sediment transport in the coastal and open ocean. We welcome presentations describing field measurements, numerical and conceptual models, and laboratory experiments on this interdisciplinary topic. Interesting subjects include, but are not limited to: (1) sedimentation effects of normally and obliquely incident critical and near-critical internal tides propagating over oceanic slopes; (2) sediment resuspension caused by internal-wave driven bed stresses, vertical “updrafts”, and vortices; (3) cross-shelf exchange driven by internal motions; and (4) morphologic and stratigraphic evidences and signatures of internal waves/tides in the seafloor and the geologic record.
Primary Chair:  David A Cacchione, Emeritus, U.S. Geological Survey, Coastal and Marine Geology, Menlo Park, CA, United States; Coastal and Marine Environments, Vancouver, WA, United States
Co-chairs:  Olivia M Cheriton, USGS Pacific Science Ctr, Santa Cruz, CA, United States, Oliver B Fringer, Stanford University, Civil and Environmental Engineering, Stanford, CA, United States and Pere Puig, ICM-CSIC, Barcelona, Spain
Moderators:  David A Cacchione, Emeritus, U.S. Geological Survey, Coastal and Marine Geology, Menlo Park, CA, United States; Coastal and Marine Environments, Vancouver, WA, United States, Olivia M Cheriton, USGS Pacific Science Ctr, Santa Cruz, CA, United States, Oliver B Fringer, Stanford University, Civil and Environmental Engineering, Stanford, CA, United States and Pere Puig, ICM-CSIC, Barcelona, Spain
Student Paper Review Liaisons:  David A Cacchione, Emeritus, U.S. Geological Survey, Coastal and Marine Geology, Menlo Park, CA, United States; Coastal and Marine Environments, Vancouver, WA, United States and Olivia M Cheriton, USGS Pacific Science Ctr, Santa Cruz, CA, United States
Index Terms:

3002 Continental shelf and slope processes [MARINE GEOLOGY AND GEOPHYSICS]
3022 Marine sediments: processes and transport [MARINE GEOLOGY AND GEOPHYSICS]
3045 Seafloor morphology, geology, and geophysics [MARINE GEOLOGY AND GEOPHYSICS]
4544 Internal and inertial waves [OCEANOGRAPHY: PHYSICAL]
Cross-Topics:
  • CD - Coastal Dynamics
  • PS - Physical Oceanography: Mesoscale and Smaller
  • PO - Physical Oceanography: Other

Abstracts Submitted to this Session:

Sediment resuspension and nepheloid layers induced by shoaling internal solitary waves (Invited) (302007)
Daniel Bourgault, Institut des Sciences de la Mer de Rimouski, Rimouski, QC, Canada, Michele Morsilli, University of Ferrara, Italy, Clark Richards, Bedford Institute of Oceanography, Dartmouth, NS, Canada, Urs Neumeier, Institut des sciences de la mer de Rimouski, Rimouski, Canada and Dan E Kelley, Dalhousie University, Oceanography, Halifax, NS, Canada
Cross-Boundary Layer Transport Due to Large Amplitude Internal Wave Propagation Over Topography (304867)
Marek Stastna, University of Waterloo, Waterloo, ON, Canada and David Deepwell, University of Waterloo, Applied Mathematics, Waterloo, ON, Canada
Dune Building Processes Over the Continental Slope in the Northeastern South China Sea (308577)
Steven R Ramp, Soliton Ocean Services LLC, Falmouth, MA, United States, David A Cacchione, Coastal and Marine Environments, Vancouver, WA, United States, Y. J. Yang, National Taiwan University, Institute of Oceanography, Taipei, Taiwan, Gwo-Shyh Song, National Taiwan University, Institute of Oceanograpy, Taipei, Taiwan, J. Y. Lou, Chinese Naval Academy, Kaohsiung, Taiwan, Ching-Sang Chiu, Naval Postgraduate School, Monterey, CA, United States, D. Benjamin Benjamin Reeder, Naval Postgraduate School, Oceanography, Monterey, CA, United States and Frederick L Bahr, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States
Observation of Internal Tides and Sediment Transport Processes at the Head of Logan Canyon on Central Scotian Slope (317837)
Michael Li, Geological Survey of Canada Atlantic, Dartmouth, NS, Canada, Robert H. Prescott, Prescott and Zou Consulting, United States and Angus G. Robertson, Geological Survey of Canada - Atlantic, NS, Canada
Internal Tides, Updraft Events, Wind-Driven Shifts in Stratification and Vertical Fluxes: How Do We Predict Continental Shelf Particulate Transport When it is Decoupled from Bed Shear Stress? (322913)
Erika E McPhee-Shaw, Western Washington University, Department of Environmental Sciences, Bellingham, WA, United States and Olivia M Cheriton, U.S. Geological Survey, Santa Cruz, CA, United States
Morphodynamic interaction of tides, internal tides and sediment transport at the shelf edge (314743)
Timothy F Duda1, Weifeng Gordon Zhang2, Zhen Cheng3, Andrew D Ashton4, Peter Traykovski5 and John H Trowbridge3, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)Woods Hole Oceanographic Inst, Woods Hole, MA, United States, (3)WHOI, Woods Hole, MA, United States, (4)WHOI, Geology and Geophysics, Woods Hole, MA, United States, (5)Woods Hole Oceanograph Inst, Falmouth, MA, United States
Numerical Simulations of Internal Wave Generation on the Peruvian Shelf (314499)
Kevin G Lamb1, Marcus Dengler2, Peter Brandt2 and Thilo Klenz3, (1)University of Waterloo, Waterloo, ON, Canada, (2)GEOMAR, Kiel, Germany, (3)University of Alaska Fairbanks, Fairbanks, AK, United States

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