HE011:
Similarities and differences of Ocean dynamics at both ends of the globe


Session ID#: 24134

Session Description:
The Arctic and the Southern oceans share many similarities: they are affected by large-scale annular modes of atmospheric variability, both are (seasonally) ice-covered and insulated from atmospheric variability, constrained by land to the north or south but are unbounded zonally, and bordered by ice-sheets.

The dynamics in these two oceans share also many characteristics. This notably includes a small Rossby deformation radius, the co-existence of areas with very strong and very weak stratification, the constraints of bottom bathymetry for the large-scale circulation, the presence of diapycnal mixing “hot spots”, the existence of strong boundary currents and a key role for eddies in setting the mean and adjustment timescale of the large-scale circulation.

Despite these similarities, important differences in the behavior of these two regions have been observed, including sea ice trends of the past decades of opposite signs. Differences in stratifications, mixed layer processes, geometry, and forcings (e.g. ozone hole) have been suggested as possible causes.

In this session, we invite contributions from observationalists, modelers and theoreticians, focusing on all aspects of the dynamics in the Arctic or the Southern Ocean (or ideally both). The goal is to share concepts and ideas transferable from one pole to the other.

Primary Chair:  Camille Lique, Laboratoire d'Océanographie Physique et Spatiale, IUEM, Plouzané, France
Co-chairs:  Helen Johnson, University of Oxford, Earth Sciences, Oxford, United Kingdom, Andrew M. Hogg, Australian National University, Canberra, ACT, Australia and David Ferreira, University of Reading, Reading, RG6, United Kingdom
Index Terms:

4207 Arctic and Antarctic oceanography [OCEANOGRAPHY: GENERAL]
4512 Currents [OCEANOGRAPHY: PHYSICAL]
4520 Eddies and mesoscale processes [OCEANOGRAPHY: PHYSICAL]
4540 Ice mechanics and air/sea/ice exchange processes [OCEANOGRAPHY: PHYSICAL]
Cross-Topics:
  • PL - Physical Oceanography: Mesoscale and Larger
  • PS - Physical Oceanography: Mesoscale and Smaller
  • RS - Regional Studies

Abstracts Submitted to this Session:

Madison Smith and Jim Thomson, Applied Physics Laboratory University of Washington, Seattle, WA, United States
Erica Jamie Rosenblum1, Sarah T Gille1 and Camille Lique2, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Laboratoire d'Océanographie Physique et Spatiale, IUEM, Plouzané, France
Nikki Brown1, Sheldon Bacon2 and Sheldon Bacon1, (1)University of Southampton, Southampton, United Kingdom, (2)National Oceanography Centre Southampton, United Kingdom
Janin Schaffer, Wilken-Jon von Appen and Torsten Kanzow, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
Georgy E Manucharyan, California Institute of Technology, Environmental Sciences and Engineering, Pasadena, CA, United States and Andrew F Thompson, California Institute of Technology, Pasadena, CA, United States
Angelica Pasqualini, Columbia University of New York City, Dept. Earth and Environmental Engineering, New York, NY, United States, Peter Schlosser, Columbia University, Dept. of Earth and Environmental Engineering and Dept. of Earth and Environmental Sciences, New York, NY, United States, Robert Newton, Columbia University of New York, Palisades, NY, United States, Ronny Friedrich, Curt Engelhorn Zentrum Archäometrie · Klaus-Tschira-Center for Archaeometry, Mannheim, Germany and William M Smethie Jr, Lamont -Doherty Earth Observatory, Palisades, NY, United States
Sam Cornish, University of Oxford, Earth Sciences, Oxford, United Kingdom, Helen Johnson, University of Oxford, Oxford, United Kingdom and Yavor Kostov, University of Oxford, Atmospheric, Oceanic and Planetary Physics, Oxford, United Kingdom