What does the Beaufort Scale measure?

The Beaufort Scale is specifically designed to measure wind intensity or wind speed based on observed conditions at sea or on land. This scale categorizes the effects of wind on various surfaces and structures, providing a qualitative measure of wind strength. Each level on the Beaufort Scale corresponds to a description of the wind's effect, ranging from calm conditions to hurricane-level winds.

The other options refer to concepts that are not applicable to the Beaufort Scale. Temperature variations, air pressure, and humidity levels are measured using different meteorological instruments and scales. For instance, temperature is measured using thermometers, air pressure is gauged with barometers, and humidity levels are assessed using hygrometers. The Beaufort Scale's unique focus on wind makes it a vital tool for sailors, meteorologists, and anyone involved in outdoor activities, emphasizing its specific role within atmospheric science.