Accession Number:

ADA513642

Title:

Wave Breaking Induced Surface Wakes and Jets Observed during a Bora Event

Descriptive Note:

Journal article

Corporate Author:

UNIVERSITY CORP FOR ATMOSPHERIC RESEARCH MONTEREY CA

Personal Author(s):

Report Date:

2005-01-01

Pagination or Media Count:

6.0

Abstract:

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 lowerterrain passes, the boundary layer flow stays strong, resembling supercritical flow. Citation Jiang, Q., and J. D. Doyle 2005, Wave breaking induced surface wakes and jets observed during a bora event.

Subject Categories:

  • Meteorology
  • Active and Passive Radar Detection and Equipment
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE