In our tour of the various types of clouds, today we focus on the Stratus or StrataThese clouds are one of two genera classified as low clouds and are characterized by their layered form, generally gray in color and with a uniform base. Drizzle, ice prisms, or cinarra are commonly associated with these types of clouds. When the sun is visible through the Stratus layer, its outline becomes clear and distinct. Occasionally, these clouds may appear as frayed shreds, known as Stratus fractus, located beneath other cloud formations.
Stratus clouds are typically located at an altitude ranging from 0 to 300 meters above ground level. They are composed primarily of small water droplets; however, at low temperatures, they may include tiny ice particles. The process of cloud formation edgers is related to the cooling in the lower layers of the atmosphere, as well as the turbulence Wind-driven. These clouds generally form over land due to nighttime radiation or the advection of warm air over a cooler surface. In marine environments, cooling occurs through advection.
One of the notable qualities of Stratus clouds is that, if they are found at ground level, they can generate fog. Stratus fractus clouds develop as accessory clouds (also known as pannus) that appear beneath other cloud types such as Altostratus, nimbostratusCumulonimbus and cumulus clouds produce precipitation. The presence of fog is frequently associated with anticyclonic weather conditions. In contrast, when Stratus appears beneath Altostratus or Nimbostratus, it is usually associated with a warm front. In thunderstorms, they can be found torn beneath Cumulonimbus clouds, indicating the imminence of a downpour.
An important aspect to differentiate Stratus clouds from other clouds such as Altostratus or Nimbostratus is their appearance. Altostratus and Nimbostratus clouds have a "wetter" appearance, while Stratus clouds tend to look "drier." It is important to note that the precipitation generated by the Stratus is very weak, while in the Nimbostratus a very weak force can be expected. moderate precipitation, constituting a key characteristic for its identification.
For those interested in photography, capturing images of Stratus during fog formation can be very appealing. It's recommended to include reference objects, such as trees, buildings, or elevations on the ground, which help provide a richer visual context. Stratus clouds are especially interesting when presented below the Nimbostratus, torn by rain or snow.
Within the Stratus classification, two species are recognized: Nebulosus y Fractus. In addition, three varieties can be identified: Opacus, Translucidus y Undulatus.
The Stratus is known for its ability to affect the visibility, especially under high-density conditions. Within the cloud, the density may gradually increase, to the point of reduce visibility to zero in certain areas. Fluctuations in density and visibility can be noticeable both vertically and horizontally. Mild to moderate icing and turbulence may also occur.
When a Stratus is observed from below, it usually appears as a gray coat with variations in luminance. The base may be clearly defined or diffuse; occasionally, it appears ragged. From above, the upper surface of Stratus may show ripples and bumps, especially in strong winds, which can highlight the unevenness of the underlying terrain.
It is interesting to note that Stratus clouds do not usually generate halo phenomena, except in situations of very low temperatures. This distinguishes them from other types of clouds that can generate this atmospheric optical phenomenon. edgers They represent a fascinating meteorological phenomenon, not only in terms of their impact on the climate, but also in their ability to influence the visibility and aesthetics of the landscape.
