Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus
Stratocumulus clouds around the globe tend to organize into cellular patterns, a phenomenon that has been primarily studied for the subtropical trade wind region. However, stratocumulus are also prevalent in high latitudes, where they often occur as mixed‐phase clouds. Yet little research has been c...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/384642 2023-05-15T15:05:41+02:00 Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus Eirund, Gesa K. Lohmann, Ulrike Possner, Anna 2019-12-16 application/application/pdf https://hdl.handle.net/20.500.11850/384642 https://doi.org/10.3929/ethz-b-000384642 en eng American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GL084959 info:eu-repo/semantics/altIdentifier/wos/000500065500001 http://hdl.handle.net/20.500.11850/384642 doi:10.3929/ethz-b-000384642 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International CC-BY Geophysical Research Letters, 46 (23) Mixed‐phase clouds Cloud organization Boundary layer dynamics Cold pools info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftethz https://doi.org/20.500.11850/384642 https://doi.org/10.3929/ethz-b-000384642 https://doi.org/10.1029/2019GL084959 2022-04-25T14:01:54Z Stratocumulus clouds around the globe tend to organize into cellular patterns, a phenomenon that has been primarily studied for the subtropical trade wind region. However, stratocumulus are also prevalent in high latitudes, where they often occur as mixed‐phase clouds. Yet little research has been conducted regarding mechanisms of cloud organization in the mixed‐phase regime. In cloud‐resolving model simulations we investigate the processes driving organization in open‐cell mixed‐phase stratocumuli. Similar to warm‐phase clouds, mixed‐phase clouds develop a subcloud circulation of evaporated/sublimated precipitation, cold pool formation, and consecutive updrafts driving new convective cells. For a larger ice to liquid water ratio, we find locally stronger precipitation and larger cloud cells. Hence, a higher concentration of ice nucleating particles can induce a breakup of the stratocumulus organization, with implications for the radiative balance at the surface. A decrease in cloud condensation nuclei concentration is also found to intensify precipitation and impact cloud organization. ISSN:0094-8276 ISSN:1944-8007 Article in Journal/Newspaper Arctic ETH Zürich Research Collection Arctic |
institution |
Open Polar |
collection |
ETH Zürich Research Collection |
op_collection_id |
ftethz |
language |
English |
topic |
Mixed‐phase clouds Cloud organization Boundary layer dynamics Cold pools |
spellingShingle |
Mixed‐phase clouds Cloud organization Boundary layer dynamics Cold pools Eirund, Gesa K. Lohmann, Ulrike Possner, Anna Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus |
topic_facet |
Mixed‐phase clouds Cloud organization Boundary layer dynamics Cold pools |
description |
Stratocumulus clouds around the globe tend to organize into cellular patterns, a phenomenon that has been primarily studied for the subtropical trade wind region. However, stratocumulus are also prevalent in high latitudes, where they often occur as mixed‐phase clouds. Yet little research has been conducted regarding mechanisms of cloud organization in the mixed‐phase regime. In cloud‐resolving model simulations we investigate the processes driving organization in open‐cell mixed‐phase stratocumuli. Similar to warm‐phase clouds, mixed‐phase clouds develop a subcloud circulation of evaporated/sublimated precipitation, cold pool formation, and consecutive updrafts driving new convective cells. For a larger ice to liquid water ratio, we find locally stronger precipitation and larger cloud cells. Hence, a higher concentration of ice nucleating particles can induce a breakup of the stratocumulus organization, with implications for the radiative balance at the surface. A decrease in cloud condensation nuclei concentration is also found to intensify precipitation and impact cloud organization. ISSN:0094-8276 ISSN:1944-8007 |
format |
Article in Journal/Newspaper |
author |
Eirund, Gesa K. Lohmann, Ulrike Possner, Anna |
author_facet |
Eirund, Gesa K. Lohmann, Ulrike Possner, Anna |
author_sort |
Eirund, Gesa K. |
title |
Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus |
title_short |
Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus |
title_full |
Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus |
title_fullStr |
Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus |
title_full_unstemmed |
Cloud Ice Processes Enhance Spatial Scales of Organization in Arctic Stratocumulus |
title_sort |
cloud ice processes enhance spatial scales of organization in arctic stratocumulus |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://hdl.handle.net/20.500.11850/384642 https://doi.org/10.3929/ethz-b-000384642 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geophysical Research Letters, 46 (23) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GL084959 info:eu-repo/semantics/altIdentifier/wos/000500065500001 http://hdl.handle.net/20.500.11850/384642 doi:10.3929/ethz-b-000384642 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.11850/384642 https://doi.org/10.3929/ethz-b-000384642 https://doi.org/10.1029/2019GL084959 |
_version_ |
1766337330175541248 |