Observation of near-inertial wave reflections within the thermostad layer of an anticyclonic mesoscale eddy

Details Observation of near-inertial wave reflections within the thermostad layer of an anticyclonic mesoscale eddy Observation of near-inertial wave reflections within the thermostad layer of an anticyclonic mesoscale eddy

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3701606b&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 1, CiteID L01606

Physics

1

Oceanography: Physical: Internal And Inertial Waves, Oceanography: Physical: Eddies And Mesoscale Processes, Oceanography: Physical: Currents, Oceanography: General: Time Series Experiments (1872, 1988, 3270, 4475), Oceanography: General: Marginal And Semi-Enclosed Seas

Scientific paper

Moored current observations in the southwestern East/Japan Sea of 16.5 months duration clearly captured two episodes of downward phase propagation (upward energy propagation) of near-inertial waves (NIWs). Time series of temperature and velocity from the mooring and ancillary information indicate that the mooring was located near the center of an anticyclonic eddy during these events. Considering the typical vertical structure of quasi-permanent eddy features in the region, the observed downward phase propagation appeared to occur within the seasonal thermocline and upper thermostad of the anticyclonic mesoscale eddy. Ray tracing simulation of NIW using the observed subinertial currents suggests that the upward energy propagation is caused by the reflection of the NIWs within the thermostad of the anticyclonic eddy, where the effect of the vertical shear of subinertial horizontal currents is larger than the buoyancy effect in controlling the propagation of NIWs.

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