The impact of secondary ice production on Arctic stratocumulus
In situ measurements of Arctic clouds frequently show that ice crystal number concentrations (ICNCs) are much higher than the number of available ice-nucleating particles (INPs), suggesting that secondary ice production (SIP) may be active. Here we use a Lagrangian parcel model (LPM) and a large-edd...
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ftdoajarticles:oai:doaj.org/article:e261478090a04ad9800f284067fb218a 2023-05-15T14:50:27+02:00 The impact of secondary ice production on Arctic stratocumulus G. Sotiropoulou S. Sullivan J. Savre G. Lloyd T. Lachlan-Cope A. M. L. Ekman A. Nenes 2020-02-01T00:00:00Z https://doi.org/10.5194/acp-20-1301-2020 https://doaj.org/article/e261478090a04ad9800f284067fb218a EN eng Copernicus Publications https://www.atmos-chem-phys.net/20/1301/2020/acp-20-1301-2020.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-20-1301-2020 1680-7316 1680-7324 https://doaj.org/article/e261478090a04ad9800f284067fb218a Atmospheric Chemistry and Physics, Vol 20, Pp 1301-1316 (2020) Physics QC1-999 Chemistry QD1-999 article 2020 ftdoajarticles https://doi.org/10.5194/acp-20-1301-2020 2022-12-31T03:21:14Z In situ measurements of Arctic clouds frequently show that ice crystal number concentrations (ICNCs) are much higher than the number of available ice-nucleating particles (INPs), suggesting that secondary ice production (SIP) may be active. Here we use a Lagrangian parcel model (LPM) and a large-eddy simulation (LES) to investigate the impact of three SIP mechanisms (rime splintering, break-up from ice–ice collisions and drop shattering) on a summer Arctic stratocumulus case observed during the Aerosol-Cloud Coupling And Climate Interactions in the Arctic (ACCACIA) campaign. Primary ice alone cannot explain the observed ICNCs, and drop shattering is ineffective in the examined conditions. Only the combination of both rime splintering (RS) and collisional break-up (BR) can explain the observed ICNCs, since both of these mechanisms are weak when activated alone. In contrast to RS, BR is currently not represented in large-scale models; however our results indicate that this may also be a critical ice-multiplication mechanism. In general, low sensitivity of the ICNCs to the assumed INP, to the cloud condensation nuclei (CCN) conditions and also to the choice of BR parameterization is found. Finally, we show that a simplified treatment of SIP, using a LPM constrained by a LES and/or observations, provides a realistic yet computationally efficient way to study SIP effects on clouds. This method can eventually serve as a way to parameterize SIP processes in large-scale models. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Rime ENVELOPE(6.483,6.483,62.567,62.567) Atmospheric Chemistry and Physics 20 3 1301 1316 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 G. Sotiropoulou S. Sullivan J. Savre G. Lloyd T. Lachlan-Cope A. M. L. Ekman A. Nenes The impact of secondary ice production on Arctic stratocumulus |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
In situ measurements of Arctic clouds frequently show that ice crystal number concentrations (ICNCs) are much higher than the number of available ice-nucleating particles (INPs), suggesting that secondary ice production (SIP) may be active. Here we use a Lagrangian parcel model (LPM) and a large-eddy simulation (LES) to investigate the impact of three SIP mechanisms (rime splintering, break-up from ice–ice collisions and drop shattering) on a summer Arctic stratocumulus case observed during the Aerosol-Cloud Coupling And Climate Interactions in the Arctic (ACCACIA) campaign. Primary ice alone cannot explain the observed ICNCs, and drop shattering is ineffective in the examined conditions. Only the combination of both rime splintering (RS) and collisional break-up (BR) can explain the observed ICNCs, since both of these mechanisms are weak when activated alone. In contrast to RS, BR is currently not represented in large-scale models; however our results indicate that this may also be a critical ice-multiplication mechanism. In general, low sensitivity of the ICNCs to the assumed INP, to the cloud condensation nuclei (CCN) conditions and also to the choice of BR parameterization is found. Finally, we show that a simplified treatment of SIP, using a LPM constrained by a LES and/or observations, provides a realistic yet computationally efficient way to study SIP effects on clouds. This method can eventually serve as a way to parameterize SIP processes in large-scale models. |
format |
Article in Journal/Newspaper |
author |
G. Sotiropoulou S. Sullivan J. Savre G. Lloyd T. Lachlan-Cope A. M. L. Ekman A. Nenes |
author_facet |
G. Sotiropoulou S. Sullivan J. Savre G. Lloyd T. Lachlan-Cope A. M. L. Ekman A. Nenes |
author_sort |
G. Sotiropoulou |
title |
The impact of secondary ice production on Arctic stratocumulus |
title_short |
The impact of secondary ice production on Arctic stratocumulus |
title_full |
The impact of secondary ice production on Arctic stratocumulus |
title_fullStr |
The impact of secondary ice production on Arctic stratocumulus |
title_full_unstemmed |
The impact of secondary ice production on Arctic stratocumulus |
title_sort |
impact of secondary ice production on arctic stratocumulus |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-1301-2020 https://doaj.org/article/e261478090a04ad9800f284067fb218a |
long_lat |
ENVELOPE(6.483,6.483,62.567,62.567) |
geographic |
Arctic Rime |
geographic_facet |
Arctic Rime |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Atmospheric Chemistry and Physics, Vol 20, Pp 1301-1316 (2020) |
op_relation |
https://www.atmos-chem-phys.net/20/1301/2020/acp-20-1301-2020.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-20-1301-2020 1680-7316 1680-7324 https://doaj.org/article/e261478090a04ad9800f284067fb218a |
op_doi |
https://doi.org/10.5194/acp-20-1301-2020 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
20 |
container_issue |
3 |
container_start_page |
1301 |
op_container_end_page |
1316 |
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1766321485333397504 |