![]() The most efficient method used to recognise lower clouds is when observed in conjunction with other clouds. The clouds generally move in the direction of the wind very similar to the direction of the wind on the ground. When observed closely, it is easy to observe the turbulent motions and hence the ever-changing structure.īeing closer to the ground, lower level clouds appear to move or progress faster than other clouds. The clouds at this level also appear not as well defined. Because of the relatively low temperatures at this level of the atmosphere, lower level clouds usually reflect lower amounts of light and therefore usually exhibit low contrast. ![]() ![]() Lower level clouds consist of those clouds in the lower layers of the atmosphere. Consequently, clouds are classified into three main groups: lower, middle and high level clouds.Ĭertain techniques introduced earlier (that determine the heights and characteristics of clouds) are incorporated within this section to identify and categorise the different type of clouds. ![]() The layer of the atmosphere where almost all cloud exists is the troposphere, although the tops of some severe thunderstorms occasionally pierce the tropopause.īecause of the large range in temperatures and air movement in the troposphere, clouds vary in structure and composition (a combination of ice crystal and water). The cloud classification system Observation TechniquesĬlouds can occur at any level of the atmosphere wherever there is sufficient moisture to allow condensation to take place. ![]()
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