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A "mackerel sky" adds to a striking sunset scene in Grimsby, Lincolnshire, England. Ripples of altocumulus or cirrocumulus clouds—resembling the markings of a king mackerel—give the phenomenon its name.
英格兰林肯郡格里姆斯比市的日落
Fluffy altocumulus undulatus clouds stain the sky red above a row of trees. These mid-level clouds, which form above 6,500 feet (2,000 meters), often herald an approaching storm.
暴风雨前夕的天空
San Francisco's Golden Gate Bridge appears to float on a sea of surrounding clouds. Such low-level clouds, called stratus clouds, occur below 6,500 feet (2,000 meters) and often bring rain or snow. Clouds that touch the ground are known as fog.
旧金山的金门大桥被笼罩在云海之中。
The summit of Washington's Mount Rainier lies hidden beneath a stack of horizontally layered lenticular clouds. These clouds are formed by high winds blowing over rough terrain and are sometimes described as a "stack of pancakes."
华盛顿州雨人峰
The beauty of a Tassajara, California, sunset is enhanced by towering cumulonimbus clouds—but they will likely spoil the serene scene. These tallest of all clouds often produce violent storms of rain, thunder, lightning, hail, and high winds.
加利福利亚州的塔撒加拉的日落
The bright lights of Tucson, Arizona, are more than matched by a flash of lightning far above the city skyline. The sunset scene shows a classic cumulonimbus cloud formation.
亚利桑那州的土克森的闪电
A horizontal bank of cloud cover enhances an aerial view of Crater Lake, Oregon. Clouds appear white because they reflect sunlight.
俄勒冈州的火山湖
[图片欣赏]Clouds (云彩)
