Effects of long-range aerosol transport ...
Type de document :
Article dans une revue scientifique: Article original
DOI :
URL permanente :
Titre :
Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic
Auteur(s) :
Coopman, Quentin [Auteur]
Garrett, Timothy J. [Auteur]
Riedi, Jérôme [Auteur]
Eckhardt, Sabine [Auteur]
Stohl, Andreas [Auteur]
Garrett, Timothy J. [Auteur]
Riedi, Jérôme [Auteur]
Eckhardt, Sabine [Auteur]
Stohl, Andreas [Auteur]
Titre de la revue :
Atmospheric Chemistry and Physics
Nom court de la revue :
Atmos. Chem. Phys.
Numéro :
16
Pagination :
4661-4674
Éditeur :
Copernicus GmbH
Date de publication :
2016-04-14
ISSN :
1680-7324
Résumé en anglais : [en]
The properties of low-level liquid clouds in the Arctic can be altered by long-range pollution transport to the region. Satellite, tracer transport model, and meteorological data sets are used here to determine a net ...
Lire la suite >The properties of low-level liquid clouds in the Arctic can be altered by long-range pollution transport to the region. Satellite, tracer transport model, and meteorological data sets are used here to determine a net aerosol–cloud interaction (ACInet) parameter that expresses the ratio of relative changes in cloud microphysical properties to relative variations in pollution concentrations while accounting for dry or wet scavenging of aerosols en route to the Arctic. For a period between 2008 and 2010, ACInet is calculated as a function of the cloud liquid water path, temperature, altitude, specific humidity, and lower tropospheric stability. For all data, ACInet averages 0.12 ± 0.02 for cloud-droplet effective radius and 0.16 ± 0.02 for cloud optical depth. It increases with specific humidity and lower tropospheric stability and is highest when pollution concentrations are low. Carefully controlling for meteorological conditions we find that the liquid water path of arctic clouds does not respond strongly to aerosols within pollution plumes. Or, not stratifying the data according to meteorological state can lead to artificially exaggerated calculations of the magnitude of the impacts of pollution on arctic clouds.Lire moins >
Lire la suite >The properties of low-level liquid clouds in the Arctic can be altered by long-range pollution transport to the region. Satellite, tracer transport model, and meteorological data sets are used here to determine a net aerosol–cloud interaction (ACInet) parameter that expresses the ratio of relative changes in cloud microphysical properties to relative variations in pollution concentrations while accounting for dry or wet scavenging of aerosols en route to the Arctic. For a period between 2008 and 2010, ACInet is calculated as a function of the cloud liquid water path, temperature, altitude, specific humidity, and lower tropospheric stability. For all data, ACInet averages 0.12 ± 0.02 for cloud-droplet effective radius and 0.16 ± 0.02 for cloud optical depth. It increases with specific humidity and lower tropospheric stability and is highest when pollution concentrations are low. Carefully controlling for meteorological conditions we find that the liquid water path of arctic clouds does not respond strongly to aerosols within pollution plumes. Or, not stratifying the data according to meteorological state can lead to artificially exaggerated calculations of the magnitude of the impacts of pollution on arctic clouds.Lire moins >
Comité de lecture :
Oui
Audience :
Internationale
Vulgarisation :
Non
Établissement(s) :
Université de Lille
CNRS
CNRS
Collections :
Équipe(s) de recherche :
Interactions Rayonnement Nuages (IRN)
Date de dépôt :
2024-01-09T17:14:33Z
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