Mapping near-inertial variability in the SE Bay of Biscay from HF radar data and two offshore moored buoys

Details Mapping near-inertial variability in the SE Bay of Biscay from HF radar data and two offshore moored buoys Mapping near-inertial variability in the SE Bay of Biscay from HF radar data and two offshore moored buoys

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3819607r&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 19, CiteID L19607

Physics

Oceanography: General: Continental Shelf And Slope Processes (3002), Oceanography: General: Descriptive And Regional Oceanography, Oceanography: General: Ocean Observing Systems, Oceanography: Physical: Internal And Inertial Waves

Scientific paper

HF radar surface current data together with data from two operational offshore oceanographic buoys located over the slope are used to map the variability associated with the near-inertial waves, during a target year (2009), in the SE Bay of Biscay. The results obtained show the complex 4D distribution of inertial oscillations in this area. We find a very pronounced horizontal structure across the area with ranges of a factor 5 in near-inertial kinetic energy. This pattern presents also strong seasonal variability, with a peak in KE closer to the shelf-break in summer, whereas winter maximum is weaker and located further to the north-east. The mooring data indicate more trapping near the surface in summer. These patterns are discussed in relation to the known seasonal differences in atmospheric/buoyancy forcing and the characteristics of the sub-inertial surface velocity field.

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