The Rossby radius in the Arctic Ocean

The first (and second) baroclinic deformation (or Rossby) radii are presented north of ~60° N, focusing on deep basins and shelf seas in the high Arctic Ocean, the Nordic seas, Baffin Bay, Hudson Bay and the Canadian Arctic Archipelago, derived from climatological ocean data. In the high Arctic Ocea...

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Bibliographic Details
Published in:Ocean Science
Main Authors: Nurser, A.J.G., Bacon, S.
Format: Article in Journal/Newspaper
Language:English
Published: 2014
Subjects:
Arctic
Arctic Ocean
Baffin Bay
Canadian Arctic Archipelago
Hudson
Hudson Bay
Arctic Archipelago
Baffin
Nansen Basin
Nordic Seas
Online Access:https://eprints.soton.ac.uk/372673/
https://eprints.soton.ac.uk/372673/1/os-10-967-2014.pdf
Description
Summary:The first (and second) baroclinic deformation (or Rossby) radii are presented north of ~60° N, focusing on deep basins and shelf seas in the high Arctic Ocean, the Nordic seas, Baffin Bay, Hudson Bay and the Canadian Arctic Archipelago, derived from climatological ocean data. In the high Arctic Ocean, the first Rossby radius increases from ~5 km in the Nansen Basin to ~15 km in the central Canadian Basin. In the shelf seas and elsewhere, values are low (1–7 km), reflecting weak density stratification, shallow water, or both. Seasonality strongly impacts the Rossby radius only in shallow seas, where winter homogenization of the water column can reduce it to below 1 km. Greater detail is seen in the output from an ice–ocean general circulation model, of higher resolution than the climatology. To assess the impact of secular variability, 10 years (2003–2012) of hydrographic stations along 150° W in the Beaufort Gyre are also analysed. The first-mode Rossby radius increases over this period by ~20%. Finally, we review the observed scales of Arctic Ocean eddies.

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