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CYCLOGENESE INTENSE [1 record]

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Record 1 2022-10-28

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

[The] rapid intensification of a storm caused by a sudden and significant drop in atmospheric pressure: the development or intensification of a bomb cyclone.

CONT

The change in pressure needed to classify something as explosive cyclogenesis is latitude dependent. For example, at 60° latitude, explosive cyclogenesis occurs if the central pressure decreases by 24 [millibars (hectopascals)] or more in 24 hours.

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
CONT

[...] dans les mers du nord de l'Europe peuvent parfois se soulever des tempêtes d'une puissance extrême, particulièrement quand le courant-jet atteint une vitesse très supérieure à la norme. Dans de tels cas se manifestent fréquemment deux phénomènes : le premier, surnommé cyclogénèse explosive, consiste en la rapidité fulgurante de l'établissement du système dynamique qui permet à la perturbation tourbillonnaire de se créer et de se creuser jusqu'à atteindre en quelques heures une pression très basse; le second n'est autre que la vitesse prodigieuse — de l'ordre de la centaine de km/h — avec laquelle cette perturbation parcourt sa trajectoire au sein du courant général.

Spanish

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