Definition of Cirrus Cloud
Cirrus
clouds, characterized by their icy
composition, are positioned in the lofty expanse of the
troposphere, notably beyond
20,000 feet (6,000 meters) . These clouds possess a slender, fibrous form, thus earning comparisons to "mare's tails," a reference to their resemblance to equine tails.
Cirrus clouds emerge when
moisture-rich
air rises into the chillier areas of the upper troposphere. In this frigid realm,
water vapor solidifies into
ice crystals, bestowing upon cirrus clouds their unique feathery look. The existence of a
jet stream or the approach of a
weather front often catalyzes this transformation.
Cirrus Cloud Varieties
The family of cirrus clouds hosts various
types, notably
cirrus fibratus,
cirrus uncinus, and
cirrus spissatus. Each type exhibits distinct
patterns and shapes. Cirrus fibratus displays straight, orderly bands, cirrus uncinus is recognized by its hooked filaments, and cirrus spissatus presents as dense, grayish layers.
Serving as
atmospheric prognosticators, cirrus clouds signal impending weather shifts. These clouds commonly materialize prior to the emergence of a
warm front or a
low-pressure system, circumstances that frequently precede
rainfall and
temperature alterations. Detailed
observation of cirrus cloud patterns and
movement offers significant
data for accurate
short-term weather
forecasting.
Cirrus Clouds and Climate
Cirrus clouds partake in intricate exchanges with the
Earth's
climate system. Given their
properties and the existing atmospheric
conditions, these clouds may influence
warming or
cooling of the Earth. They have the potential to entrap outgoing longwave
radiation, thereby instigating a warming
effect, and can reflect incoming
solar radiation back into
space, fostering a cooling effect.
Updated: May 25, 2023
Published by:
Weather U.S. | About Us