1. High-Level Clouds(6000米以上的薄雲層)
High-level clouds form above 20,000 feet (6,000 meters) and since the temperatures are so cold at such high elevations, these clouds are primarily composed of ice crystals. High-level clouds are typically thin and white in appearance, but can appear in a magnificent array of colors when the sun is low on the horizon.
High-Level Clouds :
Cloud types include cirrus and cirrostratus.
Mid-Level Clouds :
Cloud types include altocumulus, altostratus.
Low-Level Clouds :
Cloud types include nimbostratus and stratocumulus.
Clouds with Vertical Development :
Cloud types include fair weather cumulus and cumulonimbus.
Other Cloud Types :
Cloud types include contrails, billow clouds, mammatus, orographic and pileus clouds.