Access count of this item: 110
|Other Titles:||ON THE LONG PERIOD FLUCTUATION OF SURFACE WINDS|
|Authors:||石崎, 潑雄 |
|Author's alias:||ISHIZAKI, Hatsuo|
|Journal title:||京都大学防災研究所年報. A = Disaster Prevention Research Institute Annuals. A|
|Abstract:||A power-spectrum analysis of horizontal wind speed is made over a wide range fromabout 107 cps to 2. 5 x 10-1 cps by piecing together various portions of the spectrum.There appear to be three major eddy energy peaks in the spectrum; one peak occurs ata period of 4 days, second peak occurs at a period about 1 day and the third one occursnear a period of 1 mm.Between the later two peaks, there is a broad spectral gap. The power spectraldensity decreases in proportion to the -5/3th power of frequency between 10-5 cps (theperiod is about 1 day) and 10-4 cps (the period is about 3 hours) as well as in the fre-quency range higher than 10-1 cps.|
|Appears in Collections:||No.11 A|
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