Título
History of Aerosol-Cloud Interactions Derived from Observations in Mountaintop Clouds in Puerto Rico
Autor
Graciela B. Raga
DARREL BAUMGARDNER GIBSON
Olga L Mayol-Bracero
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: 10.4209/aaqr.2015.05.0359
Referencia de publicación
URL/http://www.aaqr.org/article/detail/AAQR-15-05-SIMtS-0359
Materias
CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) Aerosol optical signatures - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) African dust - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) Light polarization - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) Cloud processing of aerosols - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584]) - ([Aerosol and Air Quality Research Vol. 16, núm. 3 (2016), ISSN: 1680-8584])
Resumen o descripción
Aerosol particles in the atmosphere play a fundamental role in the formation of cloud droplets. Moreover, cloud-processing of aerosols is an important component of the changes observed in aerosol composition and size. In this study we present measurements of the physical and optical properties of interstitial and droplet residual particles in clouds made at a tropical mountain site. The measurements were made with the Aerosol Particle Spectrometer with Polarization Detection (APSPD) that was deployed at the mountaintop observatory of Pico del Este in Puerto Rico, between 25 August and 10 September, 2011 as part of the Puerto Rico African Dust and Cloud Study (PRADACS).
We evaluate the optical signatures and equivalent optical diameters of the sampled aerosol with respect to the origin and meteorological history of the air mass in which the aerosol were embedded. Additionally, the aerosol properties are related to the liquid water content present in the cloud.
The origin of the air mass is the most important factor that modulates the optical signatures, volume size distributions and total volume concentration of the sampled aerosol. Differences in the aerosol volume concentrations were significant (up to a factor of 4) between air masses originating in Africa, the North Atlantic and the South Atlantic. In addition, African aerosols have a much higher ratio of residual to interstitial volume concentration, suggesting that these particles had a higher fraction of cloud condensation nuclei than in the other air masses. Finally, the amount of precipitation along the air mass trajectories impacts the aerosol volume concentration, as does the residence time of the air mass in the moist, oceanic boundary layer, below 500 m.
Editor
Taiwan Assoc Aerosol Res-Taar
Fecha de publicación
marzo de 2012
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Fuente
Aerosol and Air Quality Research Vol. 16, núm. 3 (2016)
ISSN: 1680-8584
Idioma
Inglés
Audiencia
Investigadores
Estudiantes
Repositorio Orígen
Repositorio Institucional del Centro de Ciencias de la Atmósfera de la UNAM
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