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altostratus
Definição1
Greyish or bluish cloud sheet or layer of striated, fibrous or uniform appearance, totally or partly covering the sky, and having parts thin enough to reveal the Sun at least vaguely, as through ground glass. Altostratus does not show halo phenomena.
Fonte1
WORLD METEOROLOGICAL ORGANIZATION. International meteorological vocabulary. 2nd ed. Geneva, 1992. (WMO, n.182). Disponível em: < https://library.wmo.int/index.php?lvl=notice_display&id=220#.XeauGOhKiUk >. Acesso em: 11 dez. 2019.
Fonte2
WORLD METEOROLOGICAL ORGANIZATION. Manual on the global data-processing and forecasting system. Volume I: global aspects. Geneva, 2010. (WMO, n.485).
Nota Adicional1
Altrostratus does not show halo phenomena.
Nota Adicional2
Acronym in English: AS or As.
Contexto
A most difficult case, calling for great care and skill, occurs when a sheet of altostratus covers the sky during the evening.
Subárea
Aeronautical Meteorology
Français
altostratus