Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic
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 (ACI net ) parameter that expresses the ratio of relative...
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ftcopernicus:oai:publications.copernicus.org:acp32597 2023-05-15T14:39:34+02:00 Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic Coopman, Quentin Garrett, Timothy J. Riedi, Jérôme Eckhardt, Sabine Stohl, Andreas 2018-09-17 application/pdf https://doi.org/10.5194/acp-16-4661-2016 https://www.atmos-chem-phys.net/16/4661/2016/ eng eng doi:10.5194/acp-16-4661-2016 https://www.atmos-chem-phys.net/16/4661/2016/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-16-4661-2016 2019-12-24T09:52:38Z 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 (ACI net ) 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, ACI net is calculated as a function of the cloud liquid water path, temperature, altitude, specific humidity, and lower tropospheric stability. For all data, ACI net 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. Text Arctic Copernicus Publications: E-Journals Arctic Atmospheric Chemistry and Physics 16 7 4661 4674 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
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 (ACI net ) 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, ACI net is calculated as a function of the cloud liquid water path, temperature, altitude, specific humidity, and lower tropospheric stability. For all data, ACI net 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. |
format |
Text |
author |
Coopman, Quentin Garrett, Timothy J. Riedi, Jérôme Eckhardt, Sabine Stohl, Andreas |
spellingShingle |
Coopman, Quentin Garrett, Timothy J. Riedi, Jérôme Eckhardt, Sabine Stohl, Andreas Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic |
author_facet |
Coopman, Quentin Garrett, Timothy J. Riedi, Jérôme Eckhardt, Sabine Stohl, Andreas |
author_sort |
Coopman, Quentin |
title |
Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic |
title_short |
Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic |
title_full |
Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic |
title_fullStr |
Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic |
title_full_unstemmed |
Effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the Arctic |
title_sort |
effects of long-range aerosol transport on the microphysical properties of low-level liquid clouds in the arctic |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-16-4661-2016 https://www.atmos-chem-phys.net/16/4661/2016/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-16-4661-2016 https://www.atmos-chem-phys.net/16/4661/2016/ |
op_doi |
https://doi.org/10.5194/acp-16-4661-2016 |
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Atmospheric Chemistry and Physics |
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16 |
container_issue |
7 |
container_start_page |
4661 |
op_container_end_page |
4674 |
_version_ |
1766311552868155392 |