Accession Number : ADA590631


Title :   Quantify Lateral Dispersion and Turbulent Mixing by Spatial Array of chi-EM-APEX Floats


Descriptive Note : Annual rept.


Corporate Author : WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB


Personal Author(s) : Sanford, Thomas B ; Lien, Ren-Chieh


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA590631


Report Date : 30 Sep 2012


Pagination or Media Count : 8


Abstract : Our long-term scientific goals are to understand the dynamics and identify mechanisms of small-scale processes i.e., internal tides, inertial waves, nonlinear internal waves, vortical modes, and turbulence mixing in the ocean and thereby help develop improved parameterizations of mixing for ocean models. Mixing within the stratified ocean is a particular focus as the complex interplay of internal waves from a variety of sources and turbulence makes this a current locus of uncertainty. Our focus is on observing processes that lead to lateral mixing of water properties. Our primary scientific objective is to improve our understanding and parameterization schemes of small- to submeso-scale oceanic processes. Dispersion due to lateral processes with vertical and horizontal shears could enhance turbulent mixing. Both internal waves and vortical motions exist at vertical scales smaller than order of 10 m and horizontal scales smaller than few km. They have distinct kinematics and dynamics. Internal waves propagate and may carry energy to remote regions before they break and dissipate via turbulent processes, whereas vortical motions do not propagate and are often long lived. Separation of these two motions is necessary to improve parameterization schemes.


Descriptors :   *OCEAN MODELS , ARRAYS , INTERNAL WAVES , MIXING , OCEAN TIDES , TURBULENCE


Subject Categories : Physical and Dynamic Oceanography


Distribution Statement : APPROVED FOR PUBLIC RELEASE