Análise do perfil vertical e de propriedades de nuvens e aerossóis na Amazônia

Catandi, P. B.

doi:10.11606/d.43.2017.tde-22102015-143724

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“…The formation of glory images is very sensitive of the droplet size distribution. Considering an idealized plane‐parallel cloud, a 10% variation in droplet size compromises significantly the visualization of the bows, and a 20% variation renders the bows virtually extinct (Catandi, ). However, the analysis of cloud imagery often raises the question on how possibly non‐uniform droplet sizes would impact retrievals.…”

Section: Methodsmentioning

confidence: 99%

Deriving cloud microphysics from radiometric measurements in the Amazon Basin

Correia

Catandi

2016

Atmospheric Science Letters

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A prototype suite comprised of calibrated radiometric cameras was developed to derive estimates of key cloud properties such as brightness temperature and droplet effective radius, with high spatial and temporal resolution. The system was assembled aboard an airplane to measure shortwave radiation scattered by clouds, and longwave infrared radiation emitted by clouds. This allowed deriving cloud droplet radii in shallow cumuli, with values ranging from about 6 to 14 μm. The measured longwave radiance was inverted using Planck's equation to derive the brightness temperature, with results ranging between −18 ∘ C and +15 ∘ C.

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Section: Methodsmentioning

confidence: 99%