Wave breaking induced surface wakes and jets observed during a bora event

Details Wave breaking induced surface wakes and jets observed during a bora event Wave breaking induced surface wakes and jets observed during a bora event

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3217807j&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 17, CiteID L17807

Physics

Geophysics

10

Atmospheric Processes: Boundary Layer Processes, Atmospheric Processes: Mesoscale Meteorology, Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Regional Modeling, Nonlinear Geophysics: Nonlinear Waves, Shock Waves, Solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, 7852)

Scientific paper

An observational and modeling study of a bora event that occurred during the field phase of the Mesoscale Alpine Programme is presented. Research aircraft in-situ measurements and airborne remote-sensing observations indicate the presence of strong low-level wave breaking and alternating surface wakes and jets along the Croatian coastline over the Adriatic Sea. The observed features are well captured by a high-resolution COAMPS simulation. Analysis of the observations and modeling results indicate that the long-extending wakes above the boundary layer are induced by dissipation associated with the low-level wave breaking, which locally tends to accelerate the boundary layer flow beneath the breaking. Farther downstream of the high peaks, a hydraulic jump occurs in the boundary layer, which creates surface wakes. Downstream of lower-terrain (passes), the boundary layer flow stays strong, resembling supercritical flow.

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