AIRS Department Home Page

   Andy Jessup  
      Principal Oceanographer  
      AIRS Department  
      Applied Physics Laboratory  
      University of Washington  

   Jim Thomson  
      AIRS Department  
      Applied Physics Laboratory  
      University of Washington  

   Johannes Gemmrich  
      Research Scientist  
      University of Victoria  

   National Science Foundation  
   Office of Naval Research  

   March 2006 – March 2009  

The overall goal is to quantify the energy dissipation of breaking waves using simultaneous remote and in situ measurements. A specific objective is to test the Phillips [1985] hypothesis relating the distribution of breaking crests (as recorded remotely using imagery) with the energy dissipation of breaking crests (as recorded in the water using acoustic velocity profilers). Another specific objective is to evaluate the use of infrared imagery in detecting and quantifying microbreakers (waves that break but do not form a whitecap) in the field.

Visual (top) and infrared (bottom) images of a breaking wave.

Field data were successfully collected from the R/V Henderson on Lake Washington (November 2006) and Puget Sound (February 2008). Conditions include winds up to 20 m/s and significant wave heights up to 60 cm. Data analysis is ongoing.

R/V Henderson on Lake Washington, with
10-m imaging tower and 7-m instrument boom.

Location of measurements and relevant fetch on Lake Washington.

R/V Henderson moored at Pt. Wells.

LakeEx and SoundEx research locations.