DTIC AD0408129: POWER-SPECTRAL ANALYSIS OF TROPICAL UPPER WINDS

by: Defense Technical Information Center

Publication date: 1963-06-01

Topics: DTIC Archive, Newburg, Edward A, TRAVELERS RESEARCH CENTER INC HARTFORD CT, *WIND, *POWER SPECTRA, FREQUENCY, TABLES(DATA), PERTURBATIONS, OSCILLATION, FUNCTIONS(MATHEMATICS), KWAJALEIN ATOLL, CYCLONES, TROPICAL REGIONS, WIND VELOCITY, SAMPLING, HARMONICS,

Collection: dticarchive; additional_collections

Language: English

Power-spectral analysis of 8 mo of upper winds for Kwajalein shows significant peaks for 850 and 200 mb in the frequency band between 2.5 and 4 days. This is interpreted as the result of migrating perturbations with a wavelength of from 1000 to 2000 km moving with the trade wind. At 300 mb, the most pronounced peak is centered at 17 days; it is presumably a result either of slow-moving perturbations of a larger scale than those embedded in the trades or of meridional oscillations in the zonal flow.