NOAA Coastal Ocean Program Final Report of Phase I Research August 1996 – September 1998

NOTICE Mention of a commercial company or product does not constitute an endorsement by NOAA/ERL. Use of information from this publication concerning proprietary products or the tests of such products for publicity or advertising purposes is not authorized. hydrographic, chemical, and biological sampling transects between moorings; a juvenile pollock habitat (hatched area) around the Pribilof Islands; and a juvenile pollock survey area (shaded). Depths shown are in meters.. (top right), outer shelf region (bottom left) and middle shelf (bottom right). Floats were released in each area at the time when pollock spawning occurs in that area (see note above each map for float tracking dates. Float trajectories for 1995 are shown in red, and trajectories for 1997 are shown in green.. Figure 2.2.1 MSVPA and SSVPA estimates of walleye pollock number at age, averaged over the time period of 1984 to 1993 in the eastern Bering Sea. (Age-0 mortality rate from MSVPA and SSVPA is a half-year rate. Figure 2.3.1a Snapshot of regional model output at 20 meters depth in July after 540 days of spin up with climatological winds and specified inflows and outflows through passes. True coastlines are shown with thick black lines, and location of Unimak and Amukta passes are marked. Note that the model domain is rotated 45 degrees with respect to North. The x-and y-axes indicate the native coordinate system of the model, with 130 grid points in each direction. Salinity is shaded, with velocity vectors (m/s) and bathymetry contours (m) superimposed. Contour levels for bathymetry are every 10 m for 30-100 m, and every 50 m for 100-Figure 2.3.2 (a) Barotropic streamfunction values for July, superimposed on bathymetry (shaded). Contour levels for streamfunctions are 0.25x10 6 m 2 /s. v Figure 2.3.3 General layout, grid and boundary technique for the regional model of the southeastern Bering Sea. Model bathymetry is contoured, and land (Alaska) is colored green. Units on the axes are in meters. The interior box is resolved with ~4km spacing. Representative gridpoint locations (shown as crosses) illustrate telescoping of the grid beyond this interior box. The full domain is surrounded by closed walls. At red gridpoints we nudge the free surface height towards its proper tidal value, obtained from the global model (SEOM). At blue gridpoints we nudge the depth-integrated velocity towards values appropriate to the Aleutian North The grid of the Spectral Element Ocean Model (SEOM) used to generate tidal information …