Which instrument provides a graphical representation of wind direction frequencies over time by shading sectors?

Which instrument provides a graphical representation of wind direction frequencies over time by shading sectors?

• A. Wind Rose
• B. Campbell Stokes Sunshine recorder
• C. Hygrometer
• D. Barometer

Answer: (A)

A wind rose visualizes how often wind comes from different directions over a period. It’s a circular diagram where each sector corresponds to a compass direction, and the shading (or length) of a sector shows the frequency or percentage of time the wind blew from that direction. This makes it easy to see prevailing wind directions and how wind patterns distribute across the studied time span. The other instruments measure different things, not wind-direction frequencies. The Campbell Stokes sunshine recorder tracks how many hours of sunshine occur, by burning a trace on a card. A hygrometer measures humidity, and a barometer measures atmospheric pressure.

A wind rose visualizes how often wind comes from different directions over a period. It’s a circular diagram where each sector corresponds to a compass direction, and the shading (or length) of a sector shows the frequency or percentage of time the wind blew from that direction. This makes it easy to see prevailing wind directions and how wind patterns distribute across the studied time span.

The other instruments measure different things, not wind-direction frequencies. The Campbell Stokes sunshine recorder tracks how many hours of sunshine occur, by burning a trace on a card. A hygrometer measures humidity, and a barometer measures atmospheric pressure.