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ATLANTIC STRATOCUMULUS TRANSITION EXPERIMENT [1 record]

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Record 1 2005-12-08

English

Subject field(s)
  • Titles of International Programs
  • Climate Change
  • Air Pollution
OBS

The Atlantic Stratocumulus Transition Experiment (ASTEX) was conducted in June 1992 off North Africa, in the area of Azores and Madeira Islands. ASTEX was based on two islands and several ships in an area where the total cloud cover (mostly stratocumulus) ranges from 50-60%. The region is dominated by low-level clouds with moderate optical thicknesses, from about 1 to 10 on average. The optically thinner (more highly broken) clouds generally have cloud tops below the 800 mb level). The optically thicker clouds have lower top pressures down to about 700 mb. The region is characterized by broken low cloudiness and strong gradients of low level cloud amount. Satellite studies show cloud conditions ranging from solid stratocumulus decks to broken trade cumulus. The region is not directly influenced by continental effects, and islands provide suitable sites for surface observations and aircraft operations. ASTEX was thus able to address issues related to the stratocumulus to trade- cumulus transition and cloud-mode selection.

French

Domaine(s)
  • Titres de programmes internationaux
  • Changements climatiques
  • Pollution de l'air
Key term(s)
  • Expérience sur les stratocumulus de transition au-dessus de l'Atlantique

Spanish

Campo(s) temático(s)
  • Títulos de programas internacionales
  • Cambio climático
  • Contaminación del aire
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