Graduate Thesis Or Dissertation
 

The mesoscale wind field during project JASIN 1972

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/k0698975r

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  • The wind field measured during Project JASIN 1972, a joint British-American venture during September 1972, was analyzed. These measurements were done, with equipment manufactured by Ivar Aanderaa of Bergen, Norway, on large, anchored toroid buoys. The results of the analysis of the wind field, which included divergence and vorticity estimates and spectral analysis, compared favorably with results from previous studies by other investigators. The spectral analysis of the wind field at different locations showed some differences indicating that ocean wind fields are less homogeneous than had been expected. Basic statistics of the wind speed and direction at the same locations also confirmed this conclusion. An apparent diurnal cycle in the u and v components of the wind was studied. It was shown that the total wind vector for the study period was quite different at different horizontal locations while hourly deviations around these means during a day showed remarkable similarities. A curious eight-hour period found in the divergence estimates on a 100 km grid is possibly related to an eight-hour air pressure wave studied many years ago by Von Hann (1918) and Bartels (1932). It was concluded that the wind field over the ocean is not entirely homogeneous and some rather large differences are found over a scale as small as 100 kilometers.
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