PO14B:
Multiscale Topographic Effects on Large-Scale Flow: From Wakes and Lee Waves to Small-Scale Turbulence and Mixing III Posters


Session ID#: 27719

Session Description:
There has been a resurgence in research on stratified flow over topography in the ocean, with recent evidence suggesting its importance on the large-scale ocean circulation through topographic form drag, turbulence and mixing. The interaction of large-scale, low-frequency geostrophic currents with steep topography produces a rich submesoscale and mesoscale vorticity field that initiates a cascade of energy down to small scales and turbulence. Over more gentle topography, lee waves arise and may break nearby or propagate and eventually break elsewhere, leading to local and remote turbulence and mixing. Together, wakes and lee waves significantly impact the topographic form drag and play an important role in energy and momentum budgets of the low-frequency flow. Despite extensive research on stratified flow over topography, our ability to predict and parameterize oceanic flow at spatial scales comparable to the topography is lacking. This session solicits abstracts employing modeling, observations, or theory to link basin-scale flows to topographic lee waves/wake effects, thereby advancing the state of knowledge of (a) the science of flow at topography, boundary layers, and downscaling and (b) models and forecasts of the relevant processes.
Primary Chair:  Oliver B Fringer, Stanford University, Civil and Environmental Engineering and Oceans, Stanford, United States
Co-chairs:  Ganesh Gopalakrishnan1, Ruth C Musgrave2 and Gunnar Voet1, (1)Scripps Institution of Oceanography, La Jolla, United States(2)Dalhousie University, Department of Oceanography, Halifax, NS, Canada
Moderators:  Gunnar Voet1, Oliver B Fringer2, Ganesh Gopalakrishnan1 and Ruth C Musgrave3, (1)Scripps Institution of Oceanography, La Jolla, United States(2)Stanford University, Civil and Environmental Engineering and Oceans, Stanford, United States(3)Dalhousie University, Department of Oceanography, Halifax, NS, Canada
Student Paper Review Liaisons:  Ganesh Gopalakrishnan, Scripps Institution of Oceanography, La Jolla, United States and Oliver B Fringer, Stanford University, Civil and Environmental Engineering and Oceans, Stanford, United States
Index Terms:

4520 Eddies and mesoscale processes [OCEANOGRAPHY: PHYSICAL]
4544 Internal and inertial waves [OCEANOGRAPHY: PHYSICAL]
4562 Topographic/bathymetric interactions [OCEANOGRAPHY: PHYSICAL]
4568 Turbulence, diffusion, and mixing processes [OCEANOGRAPHY: PHYSICAL]
Cross-Topics:
  • OM - Ocean Modeling
  • PS - Physical Oceanography: Mesoscale and Smaller

Abstracts Submitted to this Session:

On the Energetics and Structure of Seamount Wakes (303397)
Brad Perfect, University of Washington Seattle, Seattle, WA, United States, James J Riley, University of Washington Seattle Campus, Seattle, WA, United States and Nirnimesh Kumar, University of Washington, Department of Civil & Environmental Engineering, Seattle, WA, United States
Investigating flow features in vicinity of Palau using an array of Pressure-recording Inverted Echo Sounders (314102)
Thomas Peacock, MIT, Cambridge, MA, United States, Ruth C Musgrave, Dalhousie University, Department of Oceanography, Halifax, NS, Canada, Jae-Hun Park, Inha University, Ocean Sciences, Incheon, South Korea and Magdalena Andres, Scripps Institution of Oceanography, University of California San Diego, Woods Hole, United States

Effects of the amplitude of tides and currents over a ridge on internal waves and turbulence (314573)

Masoud Jalali and Sutanu Sarkar, University of California San Diego, La Jolla, CA, United States
Observations of a low frequency flow-generated oceanic lee wave and associated turbulent dissipation over a tall ridge (321131)
Gunnar Voet1, Matthew H Alford2, Jennifer A MacKinnon3, Ali Mashayek2 and Jonathan D Nash4, (1)Scripps Institution of Oceanography, La Jolla, United States, (2)Scripps Institution of Oceanography, La Jolla, CA, United States, (3)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (4)Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, United States
Effects of a Dynamically Wide Submarine Canyon on Coastal Currents During an Upwelling Event (323841)
Idalia Alicia Machuca, University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada and Susan Elizabeth Allen, Univ British Columbia, Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada
Deep circulation in the eastern Chile Basin (303452)
Lena Schulze Chretien, Florida State University, Tallahassee, FL, United States and Kevin G Speer, Department Scientific Computing, Geophysical Fluid Dynamics Institute, Florida State University, Tallahassee, United States

See more of: Physical Oceanography: Other