Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds
The interactions that occur between aerosols and a mixed-phase cloud system, and the subsequent alteration of the microphysical state of such clouds, are a problem that has yet to be well constrained. Advancing our understanding of aerosol–ice processes is necessary to determine the impact of natura...
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ftunicolboulder:oai:scholar.colorado.edu:cires_facpapers-1096 2023-05-15T14:57:13+02:00 Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds Norgren, Matthew S. de Boer, Gijs Shupe, Matthew D. 2018-09-19T07:00:00Z application/pdf https://scholar.colorado.edu/cires_facpapers/100 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1096&context=cires_facpapers unknown CU Scholar https://scholar.colorado.edu/cires_facpapers/100 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1096&context=cires_facpapers http://creativecommons.org/licenses/by/4.0/ CC-BY Cooperative Institute for Research in Environmental Sciences Faculty Contributions text 2018 ftunicolboulder 2019-05-31T23:29:20Z The interactions that occur between aerosols and a mixed-phase cloud system, and the subsequent alteration of the microphysical state of such clouds, are a problem that has yet to be well constrained. Advancing our understanding of aerosol–ice processes is necessary to determine the impact of natural and anthropogenic emissions on Earth's climate and to improve our capability to predict future climate states. This paper deals specifically with how aerosols influence ice mass production in low-level Arctic mixed-phase clouds. In this study, a 9-year record of aerosol, cloud and atmospheric state properties is used to quantify aerosol influence on ice production in mixed-phase clouds. It is found that mixed-phase clouds present in a clean aerosol state have higher ice water content (IWC) by a factor of 1.22 to 1.63 at cloud base than do similar clouds in cases with higher aerosol loading. We additionally analyze radar-derived mean Doppler velocities to better understand the drivers behind this relationship, and we conclude that aerosol induced reduction of the ice crystal nucleation rate, together with decreased riming rates in polluted clouds, are likely influences on the observed reductions in IWC. Text Arctic University of Colorado, Boulder: CU Scholar Arctic |
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Open Polar |
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University of Colorado, Boulder: CU Scholar |
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ftunicolboulder |
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description |
The interactions that occur between aerosols and a mixed-phase cloud system, and the subsequent alteration of the microphysical state of such clouds, are a problem that has yet to be well constrained. Advancing our understanding of aerosol–ice processes is necessary to determine the impact of natural and anthropogenic emissions on Earth's climate and to improve our capability to predict future climate states. This paper deals specifically with how aerosols influence ice mass production in low-level Arctic mixed-phase clouds. In this study, a 9-year record of aerosol, cloud and atmospheric state properties is used to quantify aerosol influence on ice production in mixed-phase clouds. It is found that mixed-phase clouds present in a clean aerosol state have higher ice water content (IWC) by a factor of 1.22 to 1.63 at cloud base than do similar clouds in cases with higher aerosol loading. We additionally analyze radar-derived mean Doppler velocities to better understand the drivers behind this relationship, and we conclude that aerosol induced reduction of the ice crystal nucleation rate, together with decreased riming rates in polluted clouds, are likely influences on the observed reductions in IWC. |
format |
Text |
author |
Norgren, Matthew S. de Boer, Gijs Shupe, Matthew D. |
spellingShingle |
Norgren, Matthew S. de Boer, Gijs Shupe, Matthew D. Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds |
author_facet |
Norgren, Matthew S. de Boer, Gijs Shupe, Matthew D. |
author_sort |
Norgren, Matthew S. |
title |
Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds |
title_short |
Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds |
title_full |
Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds |
title_fullStr |
Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds |
title_full_unstemmed |
Observed aerosol suppression of cloud ice in low-level Arctic mixed-phase clouds |
title_sort |
observed aerosol suppression of cloud ice in low-level arctic mixed-phase clouds |
publisher |
CU Scholar |
publishDate |
2018 |
url |
https://scholar.colorado.edu/cires_facpapers/100 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1096&context=cires_facpapers |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Cooperative Institute for Research in Environmental Sciences Faculty Contributions |
op_relation |
https://scholar.colorado.edu/cires_facpapers/100 https://scholar.colorado.edu/cgi/viewcontent.cgi?article=1096&context=cires_facpapers |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766329307598159872 |