Graduate Thesis Or Dissertation
 

Chemical features of the Columbia River plume off Oregon

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/p2676x575

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  • An intensive chemical investigation, that includes the determinations of salinity, oxygen, nutrients, pH, alkalinity, and total carbon dioxide of the Columbia River plume off the Oregon coast in July 1967 shows the following unique features: 1. Along the axis of the river plume both the salinity minimum and temperature maximum occur. The location of these extrema at zero, ten, twenty meters depths differ considerably, suggesting different patterns of water flow at different depths. 2. Throughout the plume region, at salinities less than 32.5%, the plume water is supersaturated with respect to dissolved oxygen, and a subsurface oxygen maximum exists at the depths of 3.0-50 meters. 3. The relationship between apparent oxygen production by marine organisms and nutrient concentrations shows biological production of dissolved oxygen is a definite cause for the oxygen supersaturation in the plume region. 4. The plume area off Oregon is a source of oxygen transfer from the ocean into the atmosphere.
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