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An examination of the spectrum for coastal winds on the mesoscaleFrye, Daniel Evan 09 June 1971 (has links)
Wind speed data were taken at a weather station on the coast
and horizontal wind speed energy spectra were computed. The shape
of an average spectrum obtained in marine environment is compared
with an average land spectrum and the presence of a spectral gap is
observed in the shoreline spectrum. Wave number domain spectra
are compared with frequency domain spectra. Strong similarity
between the spectra is found for short periods, but at longer periods
the f-space spectrum localizes most of the energy at specific frequencies,
while the k-space spectrum spreads the energy over many
wave numbers. When the wind speed is fairly constant, Taylor's
hypothesis is found to be a reasonable approximation up to periods
of tens of minutes.
A preliminary investigation of the dependence of the value of
the drag coefficient on the period over which the average wind
is measured was made. A line of the form C[subscript Dx]/C[subscript D₁₀]= .89 + .1 log X
fits the graphed points quite well with a correlation of .98, where X
is the averaging distance in miles. Differences of 20% in the value
of the drag coefficient over averaging distances between 10 and 1600
miles are observed. From this preliminary study, it appears that
a more detailed study of this effect would be worthwhile. / Graduation date: 1972
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The mesoscale wind field during project JASIN 1972Cummings, Timothy K. 16 August 1973 (has links)
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. / Graduation date: 1974
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A statistical study of Oregon coastal windsDetweiler, John Henry 02 February 1971 (has links)
The data recorded between March 3, 1969, and October 31, 1969,
by a wind gauge installed at the South Jetty, Newport, Oregon, were
analyzed. The components of each observation were treated as if they
were an independent, normal, bivariate distribution and standard
statistical procedures were applied. It was found that the wind gauge
is obscured by the land to the southeast and that the adjacent land has
the effect of channeling the wind so that it comes from the north, the
east, and the south.
The seasonal and diurnal wind shifts were observed and described.
It was noted that the orientation of the diurnal shift changed with
time; it rotated clockwise from March to July and counterclockwise
from July to October. / Graduation date: 1971
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A study of the variation of the surface roughness lengths at Risø, DenmarkHennessey, Joseph Paul Jr 24 July 1974 (has links)
The Risø data were analyzed for variations in the surface roughness
lengths. The method of analysis was tested on the Wangara data
and proved satisfactory at this homogeneous site.
Annual mean surface roughness lengths were determined for
three wind speed categories and three stability categories. The decrease
in surface roughness length with increasing wind speed and
decreasing stability was large but not generally statistically significant
because of the large dispersion in the data. The annual mean
roughness length varied over several orders of magnitude.
These results and also the ten year mean profiles were compared
with those of previous investigators.
It was found that the standard deviation determined from mean
annual profiles over a ten year period was greater than one order of
magnitude. / Graduation date: 1975
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An examination of the mesoscale characteristics of the coastal wind fieldHansen, Robert Michael 17 August 1977 (has links)
Graduation date: 1978
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Wind measurements in the upper atmosphereDoyle, Elizabeth Margaret January 1968 (has links)
128 leaves : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.1969) from the Dept. of Physics, University of Adelaide
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A VHF boundary-layer radarDullaway, Scott N. M. (Scott Neville Michael) January 1999 (has links) (PDF)
Copy of author's previously published work inserted. Bibliography: p. 129-133. Concerned with the development of a VHF wind profiler capable of measuring from a height of 300 metres up to 4 kilometres. The different types of atmospheric detection equipment used to measure the boundary layer region of the atmosphere are reviewed, along with wind profiling observation techniques.
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Theory of air velocity measurement by dual-frequency Doppler lidarEberhard, Wynn Lowell, 1944- January 1976 (has links)
No description available.
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Adjustment of regional wind forecasts to the topographyAllard, Hubert January 1974 (has links)
No description available.
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Polarimetric millimeter-wave thermal emission from anisotropic water surfaces : application to remote sensing of ocean surface wind directionKunkee, David Bryan 12 1900 (has links)
No description available.
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