Mixing across the Arctic Ocean: Microstructure observations during the Beringia 2005 Expedition

Details Mixing across the Arctic Ocean: Microstructure observations during the Beringia 2005 Expedition Mixing across the Arctic Ocean: Microstructure observations during the Beringia 2005 Expedition

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3508606r&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 8, CiteID L08606

Other

13

Oceanography: Physical: Turbulence, Diffusion, And Mixing Processes (4490), Oceanography: Physical: Topographic/Bathymetric Interactions, Geographic Location: Arctic Region (0718, 4207), Oceanography: General: Arctic And Antarctic Oceanography (9310, 9315)

Scientific paper

Turbulent-scale temperature and conductivity were measured during the pan-arctic Beringia 2005 Expedition. The rates of dissipation of thermal variance and diapycnal diffusivities are calculated along a section from Alaska to the North Pole, across deep flat basins (Canada and Makarov Basins) and steep ridges (Alpha-Mendeleev and Lomonosov Ridges). The mixing rates are observed to be small relative to lower latitudes but also remarkably non-uniform. Relatively elevated turbulence is found over deep topography, confirming the dominant role of bottom-generated internal waves. Measured patterns of mixing in the Arctic are also associated with other mechanisms, such as double-diffusive structures and deep overflows. A better knowledge of the distribution of mixing is essential to understand the dynamics of the changing Arctic environment.

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