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Studying the Origin of the Kuroshio with an Array of ADCP-CTD Moorings
WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
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Our long-term scientific goals are to understand the dynamics and identify the mechanisms of small-scale processes i.e., internal tides, inertial waves, nonlinear internal waves NLIWs, and turbulence mixing in the ocean, and their interaction with mesoscale processes such as western boundary currents. We aim to develop improved parameterizations of mixing for ocean models. In this study, our focus is on the origin of the Kuroshio the interaction among internal tides, internal waves, mesoscale eddies, and the Kuroshio and the interaction of oceanic processes with the complex topography in Luzon Strait. The primary objectives of this observational program are to identify the origin of the Kuroshio and to quantify its properties there and as it evolves downstream. An array of three or four surface moorings will be maintained for about 1 year northeast of the Philippines, where the strong Kuroshio enters Luzon Strait. Each mooring will have an ADCP and a chain of CTD sensors to measure the velocity field, temperature, and salinity in the upper 600 m. We propose to service the moorings and conduct a shipboard survey every 6 months. Our long-term velocity, temperature, and salinity observations will help identify the origin and properties of the Kuroshio before it enters Luzon Strait. We will compare our observations with glider observations and with downstream mooring observations east of Taiwan to quantify the evolution of the Kuroshio.
APPROVED FOR PUBLIC RELEASE