The role of mixing in continental shelf waters of the southwestern Japan/East Sea
Abstract
The overall aim of this project is to understand the physics of small scale to submesoscale processes in the southwestern continental shelf of the Japan/East Sea. Specifically, itsobjectives are to characterize turbulence on the shelf, to investigate the role ofl shelf of the Japan/East Sea. Specifically, itsobjectives are to characterize turbulence on the shelf, to investigate the role of f frontal mixingalong the boundaries between the East Korea Warm Current and North Korea Cold Current tounderstand the role of mixirontal mixing along the boundaries between the East Korea Warm Current and North Korea Cold Current to understand the role of mixing associated with internal waves interacting with background currents, and to test the validity of P~e hypothesis, turbulence in theng associated with internal waves interacting with backgroundcurrents, and to test the validity of P~e hypothesis, turbulence in th bottom boundary layer(wall boundary layer theory), form drag, and shear/stratification parameterization of turbulence on the shelf. The project will build upon the funded MJES (Mixing Processes in the Southwestern Japan/East Sea) project of the U.S. Naval Researrch Laboratory (NRL), thefield program of which is conducted offshore area outside the territorial water of Korea. Toaccomplish these objectives we propose to deploy a Profiling Trawl-Resistant Bottom Mount(PTRBM) at around 100 m depth to the west of the NRL mose objectives we propose to deploy a Profiling Trawl-Resistant Bottom Mount (PTRBM) at around 100 m depth to the west of the NRL mooorings, and a set of triangularmoorings during the two intensive observational periods of MJES near the summer upwellingfront inshore of the PTRBM mooring. The full water-column observations from PTRBMmooring will help characterize coastal and frontal dynamicsre of the PTRBM mooring. The full water-column observations from PTRBM mooring will help characterize coastal and frontal dynamics a and will be used to compare tocurrent properties on the slope region measured by the NRL moorings. The triangularmoorings will cond will be used to compare to current properties on the slope region measured by the NRL moorings. The triangular moorings will consist of two WireWalker moorings and three acoustic Doppler current profiler (ADCP) moorings. At the WireWalker locations of the triannsist of two WireWalker moorings and three acoustic Doppler currentprofiler (ADCP) moorings. At the WireWalker locations of the triangular moorings, wepropose carrying out short-term (3~5 days) continuous microprofiler and CTD/lowered-ADCP casts. These observatgular moorings, we propose carrying out short-term (3~5 days) continuous microprofiler and CTD/lowered-ADCP casts. These observatioions will provide direct estimates of the energy dissipation ratesand vertical eddy diffusivities, and vertical shear and stratificns will provide direct estimates of the energy dissipation rates and vertical eddy diffusivities, and vertical shear and stratificatation of ting intervals allows to look at high-frequency (nonlinear) internal waves, internal tides, near-inertial waves, and subtidal currentpling intervals allows to look at high-frequency (nonlinear) internal waves,internal tides, near-inertial waves, and subtidal curre fluctuations. In addition, repeatedUnderway-CTD (uCTD) and ship ADCP sections across the frontal region are proposed to address thnt fluctuations. In addition, repeatedUnderway-CTD (uCTD) and ship ADCP sections across the frontal region are proposed toaddresse frontal variability and instability, and their possible association with internal waves and turbulence.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 31, 2020
- Source ID
- N629092012049
Entities
People
- Kyung-il Chang
Organizations
- Office of Naval Research
- United States Navy