Infrared imagery of ocean internal waves

Details Infrared imagery of ocean internal waves Infrared imagery of ocean internal waves

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3111309m&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 11, CiteID L11309

Physics

5

Oceanography: Physical: Internal And Inertial Waves, Oceanography: General: Remote Sensing And Electromagnetic Processes (0689), Oceanography: Physical: Upper Ocean Processes, Oceanography: Physical: Instruments And Techniques

Scientific paper

Infrared imaging provides a new way to detect internal waves under conditions where techniques that rely on backscatter from the sea surface may not be effective and it provides a new means to investigate the spatial variability associated with internal waves. This is illustrated with imagery collected in a bay under light winds using an airborne infrared camera. The internal waves appear as groups of dark and bright bands, corresponding to surface temperature fluctuations of about 0.05°C. A signal of this size is shown to be plausible based on straining of the water's surface thermal boundary layer (`cool skin') by internal waves having a strain rate of the order of 10-2 s-1. In addition, fine-scale temperature structure was detected that we speculate may indicate instabilities induced by the internal waves.

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