Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic
Clouds are important elements in the atmosphere and the whole climate system as they transport water and impact incoming and outgoing radiation. They may consist of liquid water, ice or a mixture of both. Among other factors the relation between liquid water and ice is governing how much longwave ra...
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ftoslouniv:oai:www.duo.uio.no:10852/111363 2024-09-15T17:51:43+00:00 Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic Schäfer, Britta 2024 http://hdl.handle.net/10852/111363 en eng Paper I: Britta Schäfer, Tim Carlsen, Ingrid Hanssen, Michael Gausa, and Trude Storelvmo, (2022). Observations of cold-cloud properties in the Norwegian Arctic using ground-based and spaceborne lidar, Atmospheric Chemistry and Physics (ACP), 22:9537–9551. doi:10.5194/acp-22-9537-2022. The article is included in the thesis. Also available at: https://doi.org/10.5194/acp-22-9537-2022 Paper II: Julie Pasquier, Robert Oscar David, Gabriel Freitas, Rosa Gierens, Yvette Gramlich, Sophie Haslett, Guangyu Li, Britta Schäfer, Karolina Siegel, Jörg Wieder, Kouji Adachi, Franco Belosi, Tim Carlsen, Stefano Decesari, Kerstin Ebell, Stefania Gilardoni, Martin Gysel-Beer, Jan Henneberger, Jun Inoue, Zamin A. Kanji, Makoto Koike, Yutaka Kondo, Radovan Krejci, Ulrike Lohmann, Marion Maturilli, Mauro Mazzolla, Robin Lewis Modini, Claudia Mohr, Ghislain Motos, Athanasios Nenes, Alessia Nicosia, Sho Ohata, Marco Paglione, Sangjong Park, Rosaria Erika Pileci, Fabiola Ramelli, Matteo Rinaldi, Christoph Ritter, Kazutoshi Sato, Trude Storelvmo, Yutaka Tobo, Rita Traversi, Angelo Viola and Paul Zieger, (2022). The Ny-Ålesund Aerosol Cloud Experiment (NASCENT) Overview and First Results, Bulletin of The American Meteorological Society (BAMS), 103(11):E2533–E2558. doi:10.1175/BAMS-D-21-0034.1. The paper is not available in DUO due to publisher restrictions. The published version is available at: https://doi.org/10.1175/BAMS-D-21-0034.1 Paper III: Britta Schäfer, Robert Oscar David, Paraskevi Georgakaki, Julie Pasquier, Georgia Sotiropoulou, and Trude Storelvmo, (2023). Simulations of primary and secondary ice production during an Arctic mixed-phase cloud case from the NASCENT campaign, Atmospheric Chemistry and Physics (ACP), 24:7179–7202. doi:10.5194/acp-24-7179-2024. The accepted version is included in the thesis. The published version is available at: https://doi.org/10.5194/acp-24-7179-2024 Paper IV: Britta Schäfer, Robert Oscar David, Øivind Hodnebrog and Trude Storelvmo. Simulations of the response of an Arctic mixedphase cloud to aerosol perturbations and warming. The paper is not available in DUO awaiting publishing. https://doi.org/10.5194/acp-22-9537-2022 https://doi.org/10.1175/BAMS-D-21-0034.1 https://doi.org/10.5194/acp-24-7179-2024 http://hdl.handle.net/10852/111363 Doctoral thesis Doktoravhandling 2024 ftoslouniv https://doi.org/10.5194/acp-22-9537-202210.1175/BAMS-D-21-0034.110.5194/acp-24-7179-2024 2024-08-05T14:09:29Z Clouds are important elements in the atmosphere and the whole climate system as they transport water and impact incoming and outgoing radiation. They may consist of liquid water, ice or a mixture of both. Among other factors the relation between liquid water and ice is governing how much longwave radiation and thereby heat a cloud traps between itself and the surface. These effects are not only relevant in the Arctic, but especially important there, as shortwave radiation is absent from the Arctic during large parts of the year. The first part of this thesis uses both long-term lidar measurements and shorter-term intensive in-situ observations to characterize cold clouds in the Norwegian Arctic. In the second part it aims to better represent Arctic mixed-phase clouds in a regional weather model. This is achieved by using observationally-constrained aerosol concentrations and adding processes for so-called secondary ice production, i.e. mechanisms that create new ice particles based on existing ice. Finally, the optimized model is used to study how Arctic mixed-phase clouds may change in a warmer climate. Doctoral or Postdoctoral Thesis Arctic Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Clouds are important elements in the atmosphere and the whole climate system as they transport water and impact incoming and outgoing radiation. They may consist of liquid water, ice or a mixture of both. Among other factors the relation between liquid water and ice is governing how much longwave radiation and thereby heat a cloud traps between itself and the surface. These effects are not only relevant in the Arctic, but especially important there, as shortwave radiation is absent from the Arctic during large parts of the year. The first part of this thesis uses both long-term lidar measurements and shorter-term intensive in-situ observations to characterize cold clouds in the Norwegian Arctic. In the second part it aims to better represent Arctic mixed-phase clouds in a regional weather model. This is achieved by using observationally-constrained aerosol concentrations and adding processes for so-called secondary ice production, i.e. mechanisms that create new ice particles based on existing ice. Finally, the optimized model is used to study how Arctic mixed-phase clouds may change in a warmer climate. |
format |
Doctoral or Postdoctoral Thesis |
author |
Schäfer, Britta |
spellingShingle |
Schäfer, Britta Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic |
author_facet |
Schäfer, Britta |
author_sort |
Schäfer, Britta |
title |
Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic |
title_short |
Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic |
title_full |
Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic |
title_fullStr |
Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic |
title_full_unstemmed |
Of ice crystals, clouds and climate. Measuring and modeling cold clouds in the Arctic |
title_sort |
of ice crystals, clouds and climate. measuring and modeling cold clouds in the arctic |
publishDate |
2024 |
url |
http://hdl.handle.net/10852/111363 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Paper I: Britta Schäfer, Tim Carlsen, Ingrid Hanssen, Michael Gausa, and Trude Storelvmo, (2022). Observations of cold-cloud properties in the Norwegian Arctic using ground-based and spaceborne lidar, Atmospheric Chemistry and Physics (ACP), 22:9537–9551. doi:10.5194/acp-22-9537-2022. The article is included in the thesis. Also available at: https://doi.org/10.5194/acp-22-9537-2022 Paper II: Julie Pasquier, Robert Oscar David, Gabriel Freitas, Rosa Gierens, Yvette Gramlich, Sophie Haslett, Guangyu Li, Britta Schäfer, Karolina Siegel, Jörg Wieder, Kouji Adachi, Franco Belosi, Tim Carlsen, Stefano Decesari, Kerstin Ebell, Stefania Gilardoni, Martin Gysel-Beer, Jan Henneberger, Jun Inoue, Zamin A. Kanji, Makoto Koike, Yutaka Kondo, Radovan Krejci, Ulrike Lohmann, Marion Maturilli, Mauro Mazzolla, Robin Lewis Modini, Claudia Mohr, Ghislain Motos, Athanasios Nenes, Alessia Nicosia, Sho Ohata, Marco Paglione, Sangjong Park, Rosaria Erika Pileci, Fabiola Ramelli, Matteo Rinaldi, Christoph Ritter, Kazutoshi Sato, Trude Storelvmo, Yutaka Tobo, Rita Traversi, Angelo Viola and Paul Zieger, (2022). The Ny-Ålesund Aerosol Cloud Experiment (NASCENT) Overview and First Results, Bulletin of The American Meteorological Society (BAMS), 103(11):E2533–E2558. doi:10.1175/BAMS-D-21-0034.1. The paper is not available in DUO due to publisher restrictions. The published version is available at: https://doi.org/10.1175/BAMS-D-21-0034.1 Paper III: Britta Schäfer, Robert Oscar David, Paraskevi Georgakaki, Julie Pasquier, Georgia Sotiropoulou, and Trude Storelvmo, (2023). Simulations of primary and secondary ice production during an Arctic mixed-phase cloud case from the NASCENT campaign, Atmospheric Chemistry and Physics (ACP), 24:7179–7202. doi:10.5194/acp-24-7179-2024. The accepted version is included in the thesis. The published version is available at: https://doi.org/10.5194/acp-24-7179-2024 Paper IV: Britta Schäfer, Robert Oscar David, Øivind Hodnebrog and Trude Storelvmo. Simulations of the response of an Arctic mixedphase cloud to aerosol perturbations and warming. The paper is not available in DUO awaiting publishing. https://doi.org/10.5194/acp-22-9537-2022 https://doi.org/10.1175/BAMS-D-21-0034.1 https://doi.org/10.5194/acp-24-7179-2024 http://hdl.handle.net/10852/111363 |
op_doi |
https://doi.org/10.5194/acp-22-9537-202210.1175/BAMS-D-21-0034.110.5194/acp-24-7179-2024 |
_version_ |
1810293707711184896 |