1973
DOI: 10.2151/jmsj1965.51.1_43
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The Moving Velocity of Cumulus Humilis Clouds

Abstract: The horizontal movement of cumulus humilis clouds near Sapporo was measured by the stereophotogrammetric method in the summer seasons of the years 1969 to 1971 in Sapporo. The direction and speed of individual cloud movements were presented on charts. The environmental meteorological conditions were obtained from the Sapporo rawinsonde soundings. By comparing the analytical results of clouds with the environmental meteorological conditions, the following results were obtained. The direction of horizontal movem… Show more

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Cited by 10 publications
(7 citation statements)
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“…9 includes results from Table 1 of Chiyu et al (1973), on motion of shallow cumulus clouds above land near Sapporo (43.11N, 141.41E)-27 measurements from stereo photographs, on 12 summer and autumn mornings, compared to the wind vector from radiosondes a few km away. Maximum cloud and wind speeds from Chiyu et al are lower as measurements are up to 1.5 km above ground.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…9 includes results from Table 1 of Chiyu et al (1973), on motion of shallow cumulus clouds above land near Sapporo (43.11N, 141.41E)-27 measurements from stereo photographs, on 12 summer and autumn mornings, compared to the wind vector from radiosondes a few km away. Maximum cloud and wind speeds from Chiyu et al are lower as measurements are up to 1.5 km above ground.…”
Section: Resultsmentioning
confidence: 99%
“…However, thermals can move at a different speed from the background wind, retaining their horizontal momentum while rising through wind shear (Chiyu et al, 1973;Kuettner et al, 1987). Shiino and Aoyagi (1981) report active convection moving at $0:35 or less of the background wind speed.…”
Section: Introductionmentioning
confidence: 99%
“…2(b) and (c) cannot persist for several hours in the absence of any forcing (Lou and Teitelbaum 1993). However, strong shear across continuous convective updraughts above the mountain summits at 1200 LT would be consistent with a convection wave (Kuetmer et al 1987;Bradbury 1990;Chiyu et al 1973). The peaks of the Rocky Mountains are regions of enhanced convection, for instance spawning thunderstorms (Banta and Schaaf 1987).…”
Section: Green Mountainmentioning
confidence: 99%
“…Cumulus clouds were also measured in their early stage in Sapporo (Chiyu et al 1973). Froude number were calculated for small cumulus clouds.…”
Section: -4 the Half-broadening Angle In The Constant Upward Velocimentioning
confidence: 99%