Relationships Among Shelf Temperatures, Coastal Sea Level, and the Coastal Upwelling Index Off Newport, Oregon

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Abstract
Monthly means of deep temperature at a moored current meter (Poinsettia), sea level at Newport, Oregon, and the coastal upwelling index at 45°N, 125°W were significantly (P < 0.05) correlated over 1972–74. Significant correlations were also found between both directly observed values and calculated anomalies of deep temperatures at two repeated hydrographic stations (NH-5 and NH-15), and monthly mean sea level at Neah Bay, Washington, and the upwelling index at 45°N, 125°W during 1959–69. As the relationships between temperature and sea level were slightly stronger than those between temperature and the upwelling index, sea level is a more reliable deep temperature indicator. The geometric mean estimate of the functional regression (or standard major axis) best describes each linear relationship between variable pairs. The regression equations between temperature and sea level (or the upwelling index) can be useful to reveal bottom temperature dynamics during periods of sparse observations.Key words: Oregon, bottom temperature, coastal sea level, upwelling index, independent observations, correlation, functional regression

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