pilvisyysolosuhteet

Pilvisyysolosuhteet refers to the prevailing conditions of cloud cover in a given area. It encompasses the type, amount, and altitude of clouds present. These factors significantly influence various atmospheric phenomena and environmental conditions. For instance, the presence of thick, low-lying clouds like stratus can lead to overcast skies, reduced visibility, and potentially drizzle or light rain. Conversely, high-altitude clouds such as cirrus are wispy and do not typically produce precipitation, often indicating fair weather.

The amount of cloud cover is usually expressed as a percentage of the sky that is obscured by clouds. A completely clear sky has 0% cloud cover, while a sky completely covered by clouds has 100% cloud cover. Intermediate levels, such as partly cloudy (around 25-50%) or mostly cloudy (around 50-75%), describe varying degrees of cloudiness. Cloud types, including cumulus, stratus, cirrus, and nimbus formations, each have distinct characteristics and are associated with different weather patterns.

Pilvisyysolosuhteet play a crucial role in determining solar radiation reaching the Earth's surface, impacting temperature and daylight hours. They also influence precipitation patterns, wind speeds, and are a key consideration in aviation for flight planning and safety. Understanding these conditions is essential for meteorology, agriculture, and various outdoor activities.