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mesopause

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
mes·o·pause  (mz-pôz, ms-)
n.
An atmospheric area about 80 kilometers (50 miles) above the earth's surface, forming the upper boundary of the mesosphere.
mesopause [ˈmɛsəʊˌpɔːz]
n
(Earth Sciences / Physical Geography) Meteorol the zone of minimum temperature between the mesosphere and the thermosphere
mesopause  (mz-pôz)
The boundary between the upper mesosphere and the lower thermosphere, approximately 80 km (50 mi) above the Earth's surface. It is the site of the coldest temperatures in the Earth's atmosphere, with temperatures of -100°C (-148°F).
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2) [ILLUSTRATION OMITTED] Strictly speaking, NLC is not an 'astronomical' phenomenon, being in the mesopause at about 83km, but it is part of the solar-terrestrial environment and many aspects of it, including a possible connection with the aurora, are not fully understood.
Noctilucent cloud over Britain and Western Europe, 2001-2005 by Gavine, David / Journal of the British Astronomical Association
During summer, the mesopause region is the coldest part of the Earth's atmosphere, reaching a frosty minus 130[degrees]C.
Night shift. (spectrum) by Pyper, Wendy / Ecos
Moreover, the theories require that the mesopause be cold enough for condensation to occur.
Mysterious clouds caused by cosmoids? by Weisburd, Stefi / Science News
 
 
 
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