A
wind rose is a quantitative graphical summary of the wind direction
and speed for a given time. The following wind rose graphs show
the number of hours-expressed as a percentage-that the wind
blew from a particular direction and speed.
The wind rose spokes or arms represent 16
points of the compass and are labeled by wind direction. The
percentage of time the wind blew from a given direction is expressed
by percentage for that direction on the perimeter of each rose.
The length of each segment of a spoke represents
the percentage of time the wind speed was within a specific
speed interval for a particular direction. If summed for all
wind directions, the result would provide the percentage of
all hours the wind speed was measured within a specific interval.
The percentage of time when the winds were light and variable
is shown in the center of the rose. |
