Accession Number : ADA264742


Title :   Development of a Mixed Layer Float


Descriptive Note : Final rept. 1 Nov 1991-31 Oct 1992


Corporate Author : WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB


Personal Author(s) : D'Asaro, Eric A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264742.pdf


Report Date : 03 May 1993


Pagination or Media Count : 5


Abstract : The purpose of this grant was to finish development of a new type of neutrally buoyant float designed to accurately follow the three dimensional motion of water parcels in the ocean mixed layer. This work was joint with David Farmer, of the Institute of Ocean Sciences, Sydney, British Columbia, Canada. This grant was responsible for the mechanical aspects of the float design. IOS/ BC was responsible for acoustical tracking in three-dimensions. Before the storm, the floats, which have been ballasted slightly heavier than the mixed layer, rest on the top of the stratification and oscillate in the ambient internal wave field. As the wind picks up and the mixed layer deepens, the floats begin to move vertically through the mixed layer. This, I believe, is due to the turbulence which is actually deepening the mixed layer. More surprisingly, the floats seem to generally penetrate below the mixed layer into the underlying stratification. This, I believe, is the signature of mixed layer turbulence entraining water into the mixed layer.


Descriptors :   *FLOATS , *MIXED LAYER(MARINE) , TURBULENCE , OCEANOGRAPHY , THREE DIMENSIONAL , WIND VELOCITY


Subject Categories : Physical and Dynamic Oceanography


Distribution Statement : APPROVED FOR PUBLIC RELEASE