Altocumulus clouds

Cloud types often are classified based on altitude. High clouds have their bases above 7 km (23,000 ft) and include the wispy mare s tail clouds known as cirrus the cirrocumulus, known as mackerel sky and the layers of cirro-stratus. Middle clouds have altitudes between 2 and 7 km (6500 to 23,000 ft), and are either the rounded altocumulus or the layered altostratus. Low clouds have bases from near Earth s surface to about 2 km (6500 ft), and include stratocumulus, stratus, and nimbostratus. Nimbostratus clouds usually bring rain or snow. Clouds with vertical development extend from about 2 to 7 km or more, and include cumulonimbus (thunderhead clouds) and cumulus. 

The liquid water content of typical clouds, given the symbol L and often abbreviated LWC, varies from approximately 0.05 to 3 g(water) m, with most of the observed values in the 0.1 to 0.3 g(water) m region. A frequency distribution for LWC average values for stratus, stratocumulus, altostratus, and altocumulus clouds is given in Figure 6.2 (Heymsfield, 1993). 

Altocumulus clouds, 338-3d0 Aluminum, role in acid rain effects, lQd5-10d6 Amines, 313 Ammonia, lA -75... 

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