A study of the subarctic boundary region in the Western North Pacific |
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| Authors: | R K Reed N P Laird |
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| Institution: | (1) Pacific Marine Environmental Laboratory, Environmental Research Loboratories, National Oceanic and Atmospheric Administration, 98105 Seattle, Washington, USA |
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| Abstract: | During autumn 1968 an oceanographic investigation was conducted in the region of the Subarctic boundary between 155°E and 180°. The geostrophic flow of the upper 500 m was remarkably similar in direction; hence the salinity-minimum, Intermediate water must have the same path of flow as water at the surface. A water mass analysis revealed a decrease in the percentage of Subarctic water to the south and east, plus an increase in the homogeneity of water to the east, which supports Reid's conclusions that the salinity minimum results mainly from lateral mixing in the pycnocline in this region. Salinity at the minimum increases toward the south and east, and the density at this level also increases slightly from the western to the central Pacific, perhaps as a result of unequal vertical mixing above and below the minimum. |
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