Which military aspect of weather refers to the degree of clarity in the atmosphere?

Visibility is the military aspect of weather that directly relates to the degree of clarity in the atmosphere. It refers to how far one can see, which is crucial for operational planning and execution. Reduced visibility can significantly impact the effectiveness of reconnaissance, targeting, and engagement of enemy forces, as well as the safety and mobility of friendly forces. Planning for operations in conditions of low visibility ensures that units are prepared to adapt to the challenges that such conditions present.

Winds, temperature, and cloud cover, while important meteorological factors, do not specifically address clarity in the atmosphere in the same way that visibility does. Winds affect movement and can influence weather patterns, temperature impacts thermal comfort and equipment function, and cloud cover can play a role in both visibility and weather conditions, but none of these factors define clarity as directly as visibility does.