Nubes noctilucientes
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https://doi.org/10.22201/igeof.00167169p.1965.5.1.1164Palabras clave:
Nubes noctilucientes, Atmosfera, CirrostratusResumen
Las nubes noctilucientes (abreviatura: NNL) son nubes situadas alto en la atmosfera y vistas contra el fondo de un cielo obscuro al ser iluminadas aun por la luz solar, cuando el sol esta abajo del horizonte, en ángulos de depresión entre 6° y casi 18° (Fig. 1). Generalmente parecen cirrus o cirrostratus y con frecuencia tienen delicada configuración de filigrana, con marcada estructura ondulada. Son muy delgadas y las estrellas cintilan a través de ellas casi sin obscurecerse.
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