1 / 2

Craig M. Lee, Joseph P. Martin Michael C. Gregg and Jack B. Miller

wakes from flow separation. internal wave packet. Example Surveys. separation. hydraulic. eddy. High-Resolution Surveys of Submesoscale Variability Generated by Mean and Tidal Flows Through Lombok Strait. Craig M. Lee, Joseph P. Martin Michael C. Gregg and Jack B. Miller

reuben-simmons
Télécharger la présentation

Craig M. Lee, Joseph P. Martin Michael C. Gregg and Jack B. Miller

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. wakes from flow separation internal wave packet Example Surveys separation hydraulic eddy High-Resolution Surveys of Submesoscale Variability Generated by Mean and Tidal Flows Through Lombok Strait Craig M. Lee, Joseph P. Martin Michael C. Gregg and Jack B. Miller Applied Physics Laboratory, University of Washington craig@apl.washington.edu, +1-206-685-7656 martin@apl.washington.edu, +1-206-897-1623 gregg@apl.washington.edu, +1-206-543-1353 http://iop.apl.washington.edu ; http://opd.apl.washington.edu/scistaff/bios/gregg/gregghome.html • Science Objectives • Understand dynamics governing submesoscale (e.g. flow separation, headland eddies,lee waves, internal hydraulic jumps, propagating internal solibores, internal tides) variability within a strongly-forced (tides, mean flow, winds), dynamically narrow strait. • Investigate biological response to intense, rapidly evolving, small-scale circulation (with Jones, Boss and Arnone). • Approach • Broad surveys identify dominant flow structures and processes. • Intense, repeated sampling resolves temporal and spatial scales of selected features and processes. • Remote sensing, surface current maps, meteorological forecasts guide sampling. • Remotely sensed and in situ biological measurements and optics characterize biological response. . Impact Small-scale forcing drives rapid vertical (upwelling) and lateral (cross-shelf) exchange- large impacts on biological variability. Characterize biological response to small-scale forcing within Lombok Strait- may be generalized to other Indonesian straits.

  2. Lombok Strait Submesoscale Surveys: Instrumentation (Lee, Martin, Gregg, Miller) Triaxus SWIMS3 TriSoarus • Towed Profilers Capabilities • Used to conduct synoptic, 3D surveys of submesoscale and mesoscale features • Rapid tow speed: 2-10 kts • Vehicles profile (sawtooth pattern) while being towed • High-resolution:100 m - 3 km • Profile range: surface to 600 m • Electrical/fiber optic tow cable: Data transmission to ship for realtime display and logging • Triaxus: MacArtney A/S, Denmark • SWIMS3: Developed at APL • TriSoarus: Originally Chelsea Instruments, UK- heavily modified at APL • Towed Profiler Sensors • Seabird CTD (temperature and salinity) • Seabird SBE43 dissolved oxygen • Wetlabs/Seapoint chlorophyll and CDOM fluoresence • Wetlabs 660 nm, 25 cm pathlength tranmissometer • Wetlabs AC9 9 spectral absorption and attentuation • RDI ADCPs (300 kHz and 1200 kHz) • Nortek ADCP (freq. TBD) • D&A Instruments OBS-3 optical backscatter • Altimeters- bottom avoidance • Shipboard (if possible) • Shipboard ADCPs (RDI 150 kHz broadband/phased array) • Biosonics DTX acoustic backscatter sensor • GPS positioning • Ashtech ADU3 GPS-based attitude (heading) • Meteorological sensors (wind velocity, air temperature, barometric pressure, relative humidity, short- & long-wave radiation) • VHF radios for onboard communication • Iridium satellite phone for ship-to-shore communication

More Related