Columbia River plume fronts. I. Hydrography, zooplankton distribution, and community composition
نویسندگان
چکیده
منابع مشابه
The vertical distribution of juvenile salmon (Oncorhynchus spp.) and associated fishes in the Columbia River plume
Simultaneous trawling at surface and at depth at one location off the Columbia River, Oregon, in June 2000 identified the depth distribution of juvenile salmonids and associated fishes. Juvenile salmon off the Columbia River were distributed primarily near the surface, within the upper 12 m. Highest densities of subyearling chinook salmon (Oncorhynchus tshawytscha) off the Columbia River were a...
متن کاملStructure and dynamics of the Columbia River tidal plume front
[1] Time‐dependent buoyant plumes form at the outflow of tidally dominated estuaries. When estuary discharge velocity exceeds plume internal wave speed c, a sharp front forms at the plume’s leading edge that expands from the time‐dependent source. Using observations of the Columbia River tidal plume from multiple tidal cycles we characterize time‐evolving plume structure and quantify front spee...
متن کاملSatellite-measured temporal variability of the Columbia River plume
Six years (1998–2003) of SeaWiFS multispectral satellite data are used to document the seasonal and interannual variability of the Columbia River plume on the North American west coast. A supervised classification scheme using 5 channels of normalized water-leaving radiance (nLw at 412, 443, 490, 510 and 555 nm), with training pixels adjusted temporally to optimize the signature of plume core c...
متن کاملCharacterization of Zooplankton Community and Size Composition in Relation to Hydrography and Circulation in the Sea of Japan
Our ultimate scientific goal is to understand both the biological (e.g., population structure and dynamics and behavior) and physical (e.g., advection, mesoscale physical processes, turbulence) mechanisms that act in concert to produce the observed distributions of plankton in the ocean. Our approach has been to conduct a combination of field, lab, and modeling studies. Field studies define the...
متن کاملThe bulge circulation in the Columbia River plume
While most numerical and laboratory models of coastal river inflows result in the generation of a large anticyclonic bulge near the mouth of the river, evidence of such a feature in field observations is scant. Here, results from a series of approximately shore-parallel transects 20 km west of the mouth of the Columbia River are presented that provide a detailed description of the bulge circula...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2005
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps299019