kastepistettä

Kastepistettä refers to the dew point, which is the temperature to which air must be cooled to become saturated with water vapor. At this temperature, the air can no longer hold all of its water vapor in a gaseous state. As a result, the excess water vapor condenses into liquid water, forming dew. This condensation can also occur on surfaces if they are cooled to the dew point temperature.

The dew point is an important meteorological parameter. It indicates the amount of moisture in the air. A higher dew point signifies more moisture and a greater likelihood of fog, clouds, or precipitation. Conversely, a lower dew point means drier air. Dew point is independent of air temperature; it is solely determined by the amount of water vapor present in the atmosphere.

In practical terms, a high dew point often makes the air feel more humid and uncomfortable, as it slows down the evaporation of sweat from the skin. Conversely, a low dew point indicates dry air, which can lead to chapped lips and dry skin. Meteorologists use dew point readings to forecast weather conditions, particularly those related to humidity and potential for condensation. It is a key factor in understanding atmospheric stability and the formation of various weather phenomena.