On the Relationships of Range to Standard Deviation of Wind Fluctuations

The relationships of ranges to their respective standard deviations for wind direction and speed fluctuations are found for two urban locations at a height of 33 f t . above ground level. The standard deviations are computed from 1-, 5-, lo-, and 15-sec. average and 5-, lo-, and 15-sec. iiistantaiieous chart readings. The sampling intervals for which the standard deviations and ranges are computed are 15, 30, and 60 min. The findings indicate: ( I ) the wind-direction range shows promise for standard use as an indicator of the standard deviation of wind direction fluctuations; ( 2 ) the wind-speed range relationships t o standard deviation of wind speed are not consistent. Also, the wind direction results are found to compare favorably with results from other investigations.