HE51B:
North Meets South: An Integrated Perspective of High-Latitude Ocean Dynamics I


Session ID#: 11534

Session Description:
The ocean dynamics at high northern and southern latitudes exhibit a rich range of behavior that differ substantially from those at lower latitudes.  For example, the classical subtropical Sverdup solution does not provide a lowest-order description of the wind-driven circulation at high latitudes.  The large-scale flow instead appears jet-like, often associated with mixing barriers, as in the Antarctic Circumpolar Current (ACC) and in topographically-guided boundary currents. Mesoscale eddies emerge as key agents in fluxing tracers, momentum, and vorticity across such jets. Topographic control, the possible presence of sea ice or ice shelves, and extremes of strong and weak stratification, are all characteristics found both in the high north and high south. Yet important differences exist: for example, high-latitude northern hemisphere boundary currents typically flow in the same direction as planetary/topographic Rossby wave phase propagation, while the ACC flows in the opposite direction. We invite observationalists, modelers, and theoreticians to submit talks and posters that focus on the dynamics of the large-scale and mesoscale dynamics of high latitudes. The aim is to bring together scientists with expertise from south and from north to discuss both similarities and differences between the two hemispheres.
Primary Chair:  Johan Nilsson, Stockholm University, Department of meteorology, Stockholm, Sweden
Chairs:  Paal Isachsen, University of Bergen, Bergen, Norway, Ole A Nøst, Akvaplan Niva, Arctic R&D, Trondheim, Norway and Jonathan M Lilly, Northwest Research Associates, Bellevue, WA, United States
Moderators:  Johan Nilsson, Stockholm University, Department of Meteorology, Stockholm, Sweden, Paal Isachsen, Norwegian Meteorological Institute, Sea and Ice, Oslo, Norway, Jonathan M Lilly, Northwest Research Associates, Bellevue, WA, United States and Ole A Nøst, Akvaplan Niva, Arctic R&D, Trondheim, Norway
Student Paper Review Liaisons:  Johan Nilsson, Stockholm University, Department of Meteorology, Stockholm, Sweden and Paal Isachsen, Norwegian Meteorological Institute, Sea and Ice, Oslo, Norway
Index Terms:

4516 Eastern boundary currents [OCEANOGRAPHY: PHYSICAL]
4520 Eddies and mesoscale processes [OCEANOGRAPHY: PHYSICAL]
4528 Fronts and jets [OCEANOGRAPHY: PHYSICAL]
4562 Topographic/bathymetric interactions [OCEANOGRAPHY: PHYSICAL]

Abstracts Submitted to this Session:

What's happening over the poles? (93564)
John Marshall, Massachusetts Institute of Technology, Cambridge, MA, United States
The Buoyancy-Driven Ocean Circulation with Realistic Bathymetry (90989)
Ada Gjermundsen and Joseph Henry LaCasce, University of Oslo, Department of Geosciences, Oslo, Norway
Size matters: another reason why the Atlantic is saltier than the Pacific (89343)
Paola Cessi and C. Spencer Jones, University of California San Diego, Scripps Institution of Oceanography, La Jolla, CA, United States
The Two Branches of the Recirculation of Atlantic Water in Fram Strait (90201)
Wilken-Jon von Appen1, Ursula Schauer1, Tore Hattermann1 and Jon Albretsen2, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Institute for Marine Research, Norway
Stationary Sea Surface Height Anomalies in Cyclonic Boundary Currents; the Role of PV-Conservation Along a Topographic Slope (87833)
Sara Broomé1, Johan Nilsson2 and Jonas Nycander1, (1)Stockholm University, Department of Meteorology, Stockholm, Sweden, (2)Stockholm University, Department of meteorology, Stockholm, Sweden
On the Freshwater Sensitivity of the Arctic-Atlantic Thermohaline Circulation (89473)
Erwin Lambert1, Tor Eldevik1 and Peter Haugan2, (1)Geophysical Institute, University of Bergen, and Bjerknes Centre for Climate Research, Bergen, Norway., (2)Geophysical Institute, University of Bergen, and Bjerknes Centre for Climate Research, Bergen, Norway., Bergen, Norway
On the Long-term Stability of the Lofoten Basin Eddy (92441)
H. Thomas Rossby, Univ Rhode Island, Narragansett, RI, United States, Henrik Søiland, Institute of Marine Research, Ocean Physics, Bergen, Norway and Léon Chafik, NOAA Washington DC, Washington, DC, United States
High latitude internal tides  (91060)
Ruth C Musgrave1, Robert Pinkel2, Jennifer A MacKinnon2, Matthew R Mazloff3 and William R Young4, (1)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (2)University of California San Diego, La Jolla, CA, United States, (3)UC San Diego, La Jolla, CA, United States, (4)University of California, La Jolla, CA, United States