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Noctilucent clouds (NLCs), or night shining clouds, [1] are tenuous cloud-like phenomena in the upper atmosphere of Earth. When viewed from space, they are called polar mesospheric clouds (PMCs) , detectable as a diffuse scattering layer of water ice crystals near the summer polar mesopause .
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
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.
But, a few others gave a more well-researched guess that the ghostly aurora was actually a Noctilucent Cloud. T+L reached out to the National Oceanic and Atmospheric Association, who said they too ...
The summer season also creates a unique phenomenon in the sky, known as noctilucent clouds. The clouds, also called "electric blue clouds," are formed approximately 50 miles above the Earth's ...
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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 Sun is between 1° and 6° below the horizon , as well as in winter and in more northerly latitudes. [ 1 ]
The noctilucent or night-shining cloud season has begun. NASA is reporting its spacecraft has detected the electric-blue clouds over Antartica.