Diurnal variations of winds over an upwelling region off Oregon |
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Authors: | Wayne Burt Henry Crew Noel Plutchak Jozef Dumon |
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Institution: | (1) School of Oceanography, Oregon State University, 97331 Corvallis, Ore., USA |
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Abstract: | The diurnal variation of surface winds off the coast of Oregon is described and compared with a recent analysis of winds off the coast of Peru. The Oregon wind speeds have a distinct 24-h periodicity, while the Peru wind speeds were reported to have an irregular 12-h variation. The long-and trans-shore components of both winds exhibit 24-h periodicities; the ratio of the long-shore to trans-shore diurnal amplitudes off Oregon is 2.8, twice the ratio found off Peru. Although meteorological conditions off Oregon were quasi-stationary during the period investigated, there were considerable day-to-day variations in diurnal amplitudes and phases. Diurnal amplitudes were found to be correlated with the daily mean long-shore winds. |
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