Environmental Engineering Reference
In-Depth Information
Figure 1
Schematic diagram of the main stratiform cloud
types.
(Figure 2). There are many different types of cumulus cloud, subdivided on the
basis of their appearance. Some cumuliform cloud may grow larger and taller. The
sharp outlines of the cauliflower-like cumulus become more diffuse and ragged as
the upper part of the cloud becomes a fibrous mass of ice crystals. The
cumulonimbus
stage has then been reached. At this stage of development
precipitation is usually occurring, sometimes accompanied by lightning and
thunder. As the mass of ice crystals develops, it is often blown downwind by the
strong winds of the high troposphere to form an anvil shape (Plate 1), characteristic
of cumulonimbus clouds. Convection may initiate other clouds near by or on the
flanks of the parent cloud as it gradually decays and evaporates.
