núvols

Núvols, also known as clouds, are visible masses of water droplets or ice crystals suspended in the Earth's atmosphere. They form when water vapor condenses around tiny particles in the air, such as dust, salt, or smoke. Clouds play a crucial role in the Earth's climate and weather patterns. They can reflect sunlight, which helps to cool the planet, and they can also trap heat, contributing to the greenhouse effect. Clouds are classified into several types based on their altitude and appearance. Low-level clouds, such as stratus and cumulus, are typically found below 6,500 feet (2,000 meters). Mid-level clouds, like altostratus and altocumulus, form between 6,500 and 20,000 feet (2,000 to 6,000 meters). High-level clouds, including cirrus and cirrostratus, are found above 20,000 feet (6,000 meters). Clouds can also be categorized by their vertical development, such as stratiform (layered) or cumuliform (puffy). They are essential for the water cycle, as they facilitate the precipitation of rain, snow, and other forms of precipitation. The study of clouds, known as nephology, is an important field in meteorology and atmospheric science.