What phenomenon in the atmosphere reduces horizontal visibility?

Obscuration is the phenomenon in the atmosphere that reduces horizontal visibility, primarily due to the presence of particles or water droplets suspended in the air. This can occur due to various atmospheric conditions, such as fog, smoke, haze, or dust. When these particles scatter and absorb light, they create a barrier that makes it difficult for the human eye to see long distances, thereby significantly diminishing visibility.

Condensation refers to the process by which water vapor turns into liquid, forming clouds or fog. While fog can lead to obscuration, the term itself doesn't directly relate to the general phenomenon of reduced visibility caused by various factors as broadly as obscuration does.

Precipitation, such as rain or snow, can also impact visibility but does so primarily through the water droplets themselves falling from the sky and potentially creating an obstructed view. However, obscuration encompasses a broader range of conditions, including those caused by precipitation.

Radiation, typically referring to the emission of energy in the form of waves or particles, does not directly correlate to reduction in visibility. While radiation can play a role in weather patterns and influence other phenomena, it is not the primary factor in causing obscuration or reduced visibility.

Through this understanding, obscuration serves as the most accurate term to