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Polar stratospheric clouds- According to 2 sources
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Polar stratospheric cloud - Wikipedia
This type of PSC is also called nacreous (/ ˈneɪkriəs /; from nacre, or mother of pearl), due to its iridescence. The stratosphere is very dry; unlike the troposphere, it rarely allows clouds to form. See more
A polar stratospheric cloud (PSC) is a cloud that forms in the winter polar stratosphere at altitudes from 15,000 to 25,000 m (49,000 to 82,000 ft). They are best observed during civil twilight, when the See more
The stratosphere is very dry; unlike the troposphere, it rarely allows clouds to form. In the extreme cold of the polar winter, however, … See more
PSCs are classified into two main types, each of which consists of several subtypes.
• Type I clouds have a generally stratiform appearance resembling cirrostratus or haze. They are sometimes sub-classified according to their See moreResearch
• Nacreous Clouds at atoptics.co.uk
• Polar Stratospheric Clouds Above Spitsbergen at Alfred Wegener Institute
News reports
• See moreWikipedia text under CC-BY-SA license What are nacreous clouds? | Space
Nacreous Clouds Explained: How It Happens (And …
Sep 28, 2023 · Nacreous clouds are iridescent clouds that form in the stratosphere at extremely low temperatures. They are rare and only visible at sunrise and sunset in high-latitude regions like Antarctica, Scotland, and Alaska.
Nacreous clouds - International Cloud Atlas
Nacreous clouds are ice clouds that form in the polar stratosphere at very low temperatures. They have a mother-of-pearl appearance and show brilliant iridesce…
- Clouds resembling Cirrus or Altocumulus lenticularis and showing very marked irisation, similar to that of mother of pearl; the most brilliant colours are observed when the Sun is several degrees …
Explainer: what are the ‘nacreous clouds’ lighting up …
Feb 3, 2016 · Nacreous clouds typically form in the winter polar stratosphere, a layer of our atmosphere around 15,000 to 25,000m in altitude. The …
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Nacreous - Cloud Appreciation Society
Forming at altitudes of 10–20 miles (15-25 km), up in the stratosphere, at temperatures of around -85˚C (-121˚F), nacreous clouds show beautiful iridescent pastel hues as they scatter …
The Fascinating World of Nacreous Clouds
Jan 30, 2025 · Nacreous clouds, frequently referred to as polar stratospheric clouds, are some of the most visually beautiful natural phenomena in the sky. Their radiant hues and airy look lead …
StormHour Guide to Nacreous Clouds
Mar 21, 2022 · What are Nacreous clouds? Nacreous clouds are thin, large discs that form in the lower stratosphere over polar regions when the Sun is just below the horizon. The clouds are usually brightly illuminated from below and can …
Polar Stratospheric clouds - Vajiram & Ravi
Dec 21, 2023 · Recently, weather watchers have captured images of rare Polar stratospheric clouds over Scotland, northern England and the West Midland. These are also known as nacreous clouds or mother of pearl, due to their …
Nacreous and Polar Stratospheric Clouds - Atmospheric Optics
Nacreous clouds are wave clouds. They are often found downwind of mountain ranges which induce gravity waves in the lower stratosphere. Their sheet-like forms slowly undulate and …
Nacreous clouds | Royal Meteorological Society
Feb 3, 2016 · Nacreous clouds are high-altitude clouds that form in the polar winter when temperatures drop below -78C. They are composed of nitric and sulphuric acid and create a spectrum of colours when sunlight passes through …
Mother Of Pearl Clouds: Explaining The Appearance Of …
Nov 29, 2024 · Nacreous clouds, also known as mother-of-pearl clouds, are defined as polar stratospheric clouds occurring in the lower stratosphere shortly after sunset in regions near the …
Nacreous Clouds _ Atmospheric Optics
Dec 16, 2024 · Nacreous clouds, also known as mother-of-pearl clouds, are a breathtaking phenomenon that leaves a lasting impression on anyone fortunate enough to witness them. …
Polar Stratospheric Clouds - Atmospheric Optics
Dec 16, 2024 · Polar Stratospheric Clouds (PSCs), also known as nacreous clouds, are a captivating atmospheric phenomenon that occurs in the polar regions during the winter …
Ultra-rare 'rainbow clouds' light up the Arctic Circle like auroras in ...
Jan 31, 2023 · Type II PSCs are often referred to as nacreous clouds because their iridescent hues can sometimes resemble nacre, also known as mother of pearl, which is produced in the …
Nacreous clouds - Atmospheric Optics
Nacreous clouds, sometimes called mother-of-pearl clouds, are rare but once seen are never forgotten. They are mostly visible within two hours after sunset or before dawn when they …
Nacreous clouds - Met Office
What are Nacreous clouds? Nacreous clouds are rare and very high clouds, known mainly for the coloured light they reflect after sunset and before sunrise. The colours are reminiscent of...
APOD: 2025 February 1 - Nacreous Clouds over Sweden
Known as nacreous clouds or mother-of-pearl clouds, they are rare. But their unforgettable appearance was captured in this snapshot on January 12 with the Sun just below the local …
Nacreous and Polar Stratospheric Clouds - atoptics.org.uk
Nacreous clouds are wave clouds. They are often found downwind of mountain ranges which induce gravity waves in the lower stratosphere. Their sheet-like forms slowly undulate and …
Polar Stratospheric Cloud (PSC) | SKYbrary Aviation Safety
Polar stratospheric clouds (PSCs), also known as nacreous clouds from nacre, or mother of pearl, due to their iridescence, are clouds in the winter polar stratosphere. PSCs are wave clouds. …
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