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Title: 風速変動の長周期成分について
Other Titles: ON THE LONG PERIOD FLUCTUATION OF SURFACE WINDS
Authors: 石崎, 潑雄  KAKEN_name
光田, 寧  KAKEN_name
花房, 龍男  KAKEN_name
Author's alias: ISHIZAKI, Hatsuo
MITSUTA, Yasushi
HANAFUSA, Tatsuo
Issue Date: 1-Mar-1968
Publisher: 京都大学防災研究所
Journal title: 京都大学防災研究所年報. A = Disaster Prevention Research Institute Annuals. A
Volume: 11
Issue: A
Start page: 489
End page: 497
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.
URL: http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html
URI: http://hdl.handle.net/2433/69386
Appears in Collections:No.11 A

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