polar-stratospheric-cloud definition: Noun (plural polar stratospheric clouds) 1. Nacreous Clouds over the NASA Radome, McMurdo Station, Antarctica A veil of type I PSC, easily confused with cirrostratus clouds or tropospheric haze Polar stratospheric cloud over Asker, Norway

Polar stratospheric clouds or PSC's are formed at cold regions. Polar mesospheric clouds (PMCs) are a diffuse scattering layer of water ice crystals near the summer polar mesopause. Description. Pure nacreous clouds, a type of polar stratospheric cloud, are composed of ice crystals. >> leave your comments and thoughts here << or send your thoughts to: gro.e 1589762094 tamil 1589762094 c-cra 1589762094 ps@ec 1589762094 iffo 1589762094 We value all input - especially from those who truly are the future of SPARC: Early career scientists, this is your chance to have a say! NASA’s Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation satellite was in the right place at the right time in early 2011.

They form when temperatures drop to -78°C … Polar stratospheric clouds occur only in high-latitude regions during the winter, or near winter, when temperatures in the lower and middle stratosphere fall below about −78 °C for nitric acid trihydrate, −81 °C for supercooled ternary solution polar stratospheric clouds and −85 °C for ice polar stratospheric clouds. They form when temperatures drop to -78°C or lower.

Polar Stratospheric Clouds Tropical Cyclones One explanation for the decrease in the equator to pole temperature difference (EPTD) during equable climates examines the influence of polar stratospheric clouds (PSCs) on longwave radiation leaving the Earth in the high-latitudes and, as a result, on temperatures near the poles. But at temperatures of around minus-110 degrees, at which these clouds … The winds thus acted like a barrier, preventing ozone from other parts of the atmosphere from replenishing the low ozone levels over the Arctic. In addition, the stratosphere remained cold, leading to the formation of polar stratospheric clouds, which allowed chemical reactions to release reactive forms of chlorine and cause ozone depletion. The temperature must be around -78° C (-108° F) for PSCs to form, so these clouds only occur in winter near the North and South Poles.

Polar Stratospheric Cloud Background These clouds exist at very high altitude (~70,000 ft) within Earth's stratosphere.Clouds do not normally form in the stratosphere due to its extreme dryness. They are wave clouds and their undulating sheet-like forms reveal the winds and waves of the stratosphere. These high altitude clouds form only at very low temperatures help destroy ozone in two ways. Polar stratospheric clouds or PSCs, also known as nacreous clouds from nacre, or mother of pearl, due to its iridescence), are clouds in the winter polar stratosphere. Scientists recently discovered that polar stratospheric clouds, long known to play an important role in Antarctic ozone destruction, are occurring with increasing frequency in the Arctic. Type I clouds contain water, nitric acid and/or sulphuric acid and they are a source of polar ozone depletion.