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The purpose of the NE Pacific GLOBEC program is to develop a mechanistic understanding of the response of the marine eceosystem to climate variability. Toward this end the GLOBEC cruises on the Gulf of Alaska shelf will determine the physical- chemical structure, primary production and the distribution and abundance of zooplankton, yoy salmon and other planktivorous fish. These interdisciplinary cruises will occur over a seven-year period and throughout the year so that seasonal and interannual depictions of the oceanography of this shelf will be available. Some of the data will be compared with historical data sets whereas other data sets will be a product of the first systematic sampling effort from this shelf.