Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust
Stratiform mixed-phase clouds (MPCs), which contain both supercooled liquid and ice, play a key role in the energy balance of the Arctic and are a major contributor to surface precipitation. As Arctic shipping is projected to increase with climate change, these clouds may frequently be exposed to lo...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/129188 2024-09-30T14:30:17+00:00 Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust Possner, Anna Ekman, Annica M.L. Lohmann, Ulrike 2017-02-28 application/application/pdf https://hdl.handle.net/20.500.11850/129188 https://doi.org/10.3929/ethz-b-000129188 en eng Wiley info:eu-repo/semantics/altIdentifier/doi/10.1002/2016GL071358 info:eu-repo/semantics/altIdentifier/wos/000396411100042 http://hdl.handle.net/20.500.11850/129188 doi:10.3929/ethz-b-000129188 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Geophysical Research Letters, 44 (4) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2017 ftethz https://doi.org/20.500.11850/12918810.3929/ethz-b-00012918810.1002/2016GL071358 2024-09-10T15:45:30Z Stratiform mixed-phase clouds (MPCs), which contain both supercooled liquid and ice, play a key role in the energy balance of the Arctic and are a major contributor to surface precipitation. As Arctic shipping is projected to increase with climate change, these clouds may frequently be exposed to local aerosol perturbations of up to 15,000 cm−3. Yet little consensus exists within the community regarding the key feedback mechanisms induced in MPCs perturbed by ship exhaust, or aerosol in general. Here we show that many known processes identified in the warm-phase stratocumulus regime can be extrapolated to the MPC regime. However, their effect may be compensated, or even undermined, by the following two most relevant processes unique to the MPC regime: (i) increased cloud glaciation via immersion freezing due to cloud condensation nuclei (CCN) induced cloud top radiative cooling and (ii) the continued cycling of ice nucleating particles (INPs) through the cloud and subcloud layer. ISSN:0094-8276 ISSN:1944-8007 Article in Journal/Newspaper Arctic Climate change ETH Zürich Research Collection Arctic |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
Stratiform mixed-phase clouds (MPCs), which contain both supercooled liquid and ice, play a key role in the energy balance of the Arctic and are a major contributor to surface precipitation. As Arctic shipping is projected to increase with climate change, these clouds may frequently be exposed to local aerosol perturbations of up to 15,000 cm−3. Yet little consensus exists within the community regarding the key feedback mechanisms induced in MPCs perturbed by ship exhaust, or aerosol in general. Here we show that many known processes identified in the warm-phase stratocumulus regime can be extrapolated to the MPC regime. However, their effect may be compensated, or even undermined, by the following two most relevant processes unique to the MPC regime: (i) increased cloud glaciation via immersion freezing due to cloud condensation nuclei (CCN) induced cloud top radiative cooling and (ii) the continued cycling of ice nucleating particles (INPs) through the cloud and subcloud layer. ISSN:0094-8276 ISSN:1944-8007 |
format |
Article in Journal/Newspaper |
author |
Possner, Anna Ekman, Annica M.L. Lohmann, Ulrike |
spellingShingle |
Possner, Anna Ekman, Annica M.L. Lohmann, Ulrike Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
author_facet |
Possner, Anna Ekman, Annica M.L. Lohmann, Ulrike |
author_sort |
Possner, Anna |
title |
Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
title_short |
Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
title_full |
Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
title_fullStr |
Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
title_full_unstemmed |
Cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
title_sort |
cloud response and feedback processes in stratiform mixed-phase clouds perturbed by ship exhaust |
publisher |
Wiley |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.11850/129188 https://doi.org/10.3929/ethz-b-000129188 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
Geophysical Research Letters, 44 (4) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2016GL071358 info:eu-repo/semantics/altIdentifier/wos/000396411100042 http://hdl.handle.net/20.500.11850/129188 doi:10.3929/ethz-b-000129188 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International |
op_doi |
https://doi.org/20.500.11850/12918810.3929/ethz-b-00012918810.1002/2016GL071358 |
_version_ |
1811635305646653440 |