Gordie Swartzman         Senior Engineer         EIS Department         Applied Physics Laboratory         University of Washington	This project addresses the retrospective aspect of the U.S. GLOBEC Announcement of Opportunity. Using acoustic data collected by the National Marine Fisheries Service (NMFS) during summer 1995 and 1998, APL-UW is participating in the summer acoustic survey in 2001. The goals are to: (1) identify shoals of fish and patches of plankton in the water column using image thresholds and morphological filtering and pixel-by-pixel subtraction of echo-sounder images at two frequencies; (2) combine these data with hydrodynamic data collected on the same cruises including currents with depth (Acoustic Doppler Current Profiler); temperature and salinity with depth (CTD and XBT data), bathymetry (acoustic bottom detection), and surface temperature (AVHRR images) and fluorescence (SeaWIFS images, 1998 and 2001 only); (3) collect net sample data including BONGO nets for zooplankton patch identification and Methot and Anchovy trawl samples for fish size and species distribution; and (4) make these data available as baseline data for process and monitoring studies conducted in the CCS north and south of Cape Blanco, Oregon. We are also collecting fluorescence data both at the surface and occasionally through the water column to add to the SeaWIFS satellite image data. Scientists examine a series of hypotheses concerning the possible association of large euphausiid patches near the shelf break north of Cape Blanco, Oregon with minimum alongshore and onshore-offshore currents, large phytoplankton biomass and upwelling-driven currents directed towards the shelf break. We are testing hypotheses about the proximity of euphausiids with a major predator fish, Pacific whiting, and the changes south to north of Cape Blanco, the possible enhancement of euphausiid density along the edges of submarine canyons, and the effect of El Nino on both euphausiid and whiting distribution and abundance. The analyzed data will form a baseline data set for use by ongoing and proposed GLOBEC monitoring and process studies.