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Noctilucent clouds may be confused with cirrus clouds, but appear sharper under magnification. [50] Those caused by rocket exhausts tend to show colours other than silver or blue, [51] because of iridescence caused by the uniform size of the water droplets produced. [55] Noctilucent clouds may be seen at latitudes of 50° to 65°. [56]
Mesospheric noctilucent clouds over Estonia. Noctilucent clouds are thin clouds that come in a variety of forms based from about 80 to 85 kilometres (262,000–279,000 ft) and occasionally seen in deep twilight after sunset and before sunrise. [6] [7] Type 1 Veils, very tenuous stratiform; resembles cirrostratus or poorly defined cirrus. Type 2
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Noctilucent cloud over Estonia. Noctilucent clouds are the highest in the atmosphere and are found near the top of the mesosphere at about 80 to 85 km (50 to 53 mi) or roughly ten times the altitude of tropospheric high clouds. [131] They are given this Latin derived name because of their illumination well after sunset and before sunrise.
Bahasa Indonesia; עברית ... Download QR code; Print/export Download as PDF; Printable version; In other projects ... Noctilucent cloud; O. Opacus (cloud variety) P.
Cirrus clouds, by Fir0002 Damage from the 1900 Galveston hurricane , by Griffith & Griffith (edited by Durova ) Dust storm at Dust Bowl , by Arthur Rothstein (edited by Mvuijlst )
Noctilucent clouds are located in the mesosphere. The upper mesosphere is also the region of the ionosphere known as the D layer , which is only present during the day when some ionization occurs with nitric oxide being ionized by Lyman series -alpha hydrogen radiation.