Kuroshio Intrusion and Internal Wave Study using ADCPTC

Kuroshio Intrusion and Internal Wave Study using ADCP/TC Moorings and EM-APEX Floats Ren-Chieh Lien and Thomas Sanford Review of Oceanic Processes Instruments and Scientific Goals Experimental Plan

Topographic Chart & Kuroshio Path Shelfbreak Cold Dome (? ) Kuroshio/Topo Internal Tides NLIWs I-Lan Ridge The Kuroshio main path and intrusion both migrate.

Summary of Sound Speed Variations /s m 0 1 s. C > (10 mins, kms) propagating (10 hrs, 100 kms) propagating (10 s-days, 100 kms) Stationary/advecting s. C (m/s)

Random Propagating Nonlinear Internal Waves (Hsu et al) Inner Shelf Near Canyons ak e r lf B She Q PE

Kuroshio Intrusion via Canyons August 1994 North Mien-Hua Canyon Tang et al. (1999)

Geostrophic Velocity Computed from Historical CTD 25. 5 N 25. 4 N Kuroshio Intrusion into North Mien-Hua Canyon 25. 2 N

Numerical Model Results of Internal Tides (Jan)

ADCP /T-C Moorings (6) Scientific Goals: Cold Dome on the Continental Slope Kuroshio Intrusion in Canyons and Slope Internal Tides NLIWs Each Mooring Equipped with One 75 -k. Hz ADCP and Seven TC Sensors Measurements of T, S, U, V, W over the Water Column of 600 -700 m, Sampled at < 20 s Observation Period 5 -6 Weeks: Early August – Mid September (? )

EM-APEX Floats Scientific Goals: Cold Dome Properties Kuroshio Intrusion in Canyon Internal Tidal Energy in Canyons and on Shelf Bottom and Surface Boundary Layers EM-APEX Float (4) Vertical Profiles of T, S, and Velocity; GPS Real-time Observations via Iridium 2 -way Comms (permits mod. to sampling) Multiple Deployments Observation Period 2 weeks: Late August – Early September (? )

Q PE AO ADCP/TC Moorings and EM-APEX Floats Deployment Plan