Israel Program for Scientific Translations, 1976 - Clouds - 237 pages
The Geophysical Institute at the University of Alaska Fairbanks offers the full text of the September 28, 1979 article entitled "Noctilucent Clouds," written by T. Neil Davis, as part of the Alaska Science Forum. Davis discusses noctilucent clouds, which are unique because of their height of over 40 miles above the ground. The clouds are most often seen from March through October in the northern hemisphere, and during the summer in the southern hemisphere.
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RANGE OF DISTRIBUTION AND FREQUENCY OF OCCURRENCE
MORPHOLOGY AND DYNAMICS OF NOCTILUCENT CLOUDS
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albedo altitude angle anticyclone assumed Astronomicheskii average bands blue clouds Bronshten Burov cloud layer concentration condensation nuclei corresponds cosmic dust curve density determined distribution dust earth's atmosphere equation Figure Fogle formation of noctilucent Grishin hypothesis ice crystals Izdatel'stvo Jesse July Khvostikov latitudes lucent clouds m/sec mass maximum measurements mesopause mesosphere meteor streams meteoric bodies meteoric particles meteorite method molecules nocti Noctilucent Cloud Appearance noctilucent cloud displays noctilucent cloud field noctilucent cloud formation Noctilucent Cloud Observations noctilucent cloud occurrences noctilucent cloud particles obtained optical photographs photometric polarization pressure radiation rays region Riga rocket scattering serebristykh oblakov serebristym oblakam Sharonov solar activity soveshchaniya po serebristym spectral stations stellar magnitude stilb Störmer Tallin Tartu temperature tion tropospheric Trudy soveshchaniya twilight sky updrafts upper atmosphere USSR values variation Vasil'ev velocity Venus vertical Vestine Villmann visible volcanic water vapor wave wavelength