Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard
Multilayer clouds (MLCs) occur more often in theArctic than globally. In this study we present the results of a detection algorithm applied to radiosonde and radar datafrom an 1-year time period in Ny-Ålesund, Svalbard. Multi-layer cloud occurrence is found on 29 % of the investigated days. These mu...
Published in: | Atmospheric Chemistry and Physics |
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COPERNICUS GESELLSCHAFT MBH
2019
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Online Access: | https://epic.awi.de/id/eprint/49451/ https://epic.awi.de/id/eprint/49451/1/acp-19-5111-2019.pdf https://www.atmos-chem-phys.net/19/5111/2019/ https://hdl.handle.net/10013/epic.0530c768-8951-4d84-a388-df48e7acc781 https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:49451 2023-05-15T14:27:32+02:00 Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard Vassel, Maiken Ickes, Luisa Maturilli, Marion Hoose, Corinna 2019-04-16 application/pdf https://epic.awi.de/id/eprint/49451/ https://epic.awi.de/id/eprint/49451/1/acp-19-5111-2019.pdf https://www.atmos-chem-phys.net/19/5111/2019/ https://hdl.handle.net/10013/epic.0530c768-8951-4d84-a388-df48e7acc781 https://hdl.handle.net/ unknown COPERNICUS GESELLSCHAFT MBH https://epic.awi.de/id/eprint/49451/1/acp-19-5111-2019.pdf https://hdl.handle.net/ Vassel, M. , Ickes, L. , Maturilli, M. orcid:0000-0001-6818-7383 and Hoose, C. (2019) Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard , Atmospheric Chemistry and Physics, 19 , pp. 5111-5126 . doi:10.5194/acp-19-5111-2019 <https://doi.org/10.5194/acp-19-5111-2019> , hdl:10013/epic.0530c768-8951-4d84-a388-df48e7acc781 EPIC3Atmospheric Chemistry and Physics, COPERNICUS GESELLSCHAFT MBH, 19, pp. 5111-5126, ISSN: 1680-7316 Article isiRev 2019 ftawi https://doi.org/10.5194/acp-19-5111-2019 2021-12-24T15:44:39Z Multilayer clouds (MLCs) occur more often in theArctic than globally. In this study we present the results of a detection algorithm applied to radiosonde and radar datafrom an 1-year time period in Ny-Ålesund, Svalbard. Multi-layer cloud occurrence is found on 29 % of the investigated days. These multilayer cloud cases are further analysed regarding the possibility of ice crystal seeding, meaning that an ice crystal can survive sublimation in a subsaturated layer between two cloud layers when falling through this layer. For this we analyse profiles of relative humidity with respect to ice to identify super- and subsaturated air layers. Then the sublimation of an ice crystal of an assumed initial size of r=400 μm on its way through the subsaturated layer is calculated. If the ice crystal still exists when reaching a lower supersaturated layer, ice crystal seeding can potentially take place. Seeding cases are found often, in 23 % of the investigated days (100 % includes all days, as well as non-cloudy days). The identification of seeding cases is limited by the radar signal inside the subsaturated layer. Clearly separated multilayer clouds, defined by a clear interstice in the radar image, do not interact through seeding (9 % of the investigated days). There are various deviations between the relative humidity profiles and the radar images, e.g. due to the lack of ice-nucleating particles (INPs) and cloud condensation nuclei (CCN). Additionally, horizontal wind drift of the radiosonde and time restriction when comparing radiosonde and radar data cause further deviations. In order to account for some of these deviations, an evaluation by manual visual inspection is done for the non-seeding cases. Article in Journal/Newspaper Arctic Arctic Ny Ålesund Ny-Ålesund Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Ny-Ålesund Svalbard Atmospheric Chemistry and Physics 19 7 5111 5126 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Multilayer clouds (MLCs) occur more often in theArctic than globally. In this study we present the results of a detection algorithm applied to radiosonde and radar datafrom an 1-year time period in Ny-Ålesund, Svalbard. Multi-layer cloud occurrence is found on 29 % of the investigated days. These multilayer cloud cases are further analysed regarding the possibility of ice crystal seeding, meaning that an ice crystal can survive sublimation in a subsaturated layer between two cloud layers when falling through this layer. For this we analyse profiles of relative humidity with respect to ice to identify super- and subsaturated air layers. Then the sublimation of an ice crystal of an assumed initial size of r=400 μm on its way through the subsaturated layer is calculated. If the ice crystal still exists when reaching a lower supersaturated layer, ice crystal seeding can potentially take place. Seeding cases are found often, in 23 % of the investigated days (100 % includes all days, as well as non-cloudy days). The identification of seeding cases is limited by the radar signal inside the subsaturated layer. Clearly separated multilayer clouds, defined by a clear interstice in the radar image, do not interact through seeding (9 % of the investigated days). There are various deviations between the relative humidity profiles and the radar images, e.g. due to the lack of ice-nucleating particles (INPs) and cloud condensation nuclei (CCN). Additionally, horizontal wind drift of the radiosonde and time restriction when comparing radiosonde and radar data cause further deviations. In order to account for some of these deviations, an evaluation by manual visual inspection is done for the non-seeding cases. |
format |
Article in Journal/Newspaper |
author |
Vassel, Maiken Ickes, Luisa Maturilli, Marion Hoose, Corinna |
spellingShingle |
Vassel, Maiken Ickes, Luisa Maturilli, Marion Hoose, Corinna Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard |
author_facet |
Vassel, Maiken Ickes, Luisa Maturilli, Marion Hoose, Corinna |
author_sort |
Vassel, Maiken |
title |
Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard |
title_short |
Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard |
title_full |
Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard |
title_fullStr |
Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard |
title_full_unstemmed |
Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard |
title_sort |
classification of arctic multilayer clouds using radiosonde and radar data in svalbard |
publisher |
COPERNICUS GESELLSCHAFT MBH |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49451/ https://epic.awi.de/id/eprint/49451/1/acp-19-5111-2019.pdf https://www.atmos-chem-phys.net/19/5111/2019/ https://hdl.handle.net/10013/epic.0530c768-8951-4d84-a388-df48e7acc781 https://hdl.handle.net/ |
geographic |
Arctic Ny-Ålesund Svalbard |
geographic_facet |
Arctic Ny-Ålesund Svalbard |
genre |
Arctic Arctic Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic Arctic Ny Ålesund Ny-Ålesund Svalbard |
op_source |
EPIC3Atmospheric Chemistry and Physics, COPERNICUS GESELLSCHAFT MBH, 19, pp. 5111-5126, ISSN: 1680-7316 |
op_relation |
https://epic.awi.de/id/eprint/49451/1/acp-19-5111-2019.pdf https://hdl.handle.net/ Vassel, M. , Ickes, L. , Maturilli, M. orcid:0000-0001-6818-7383 and Hoose, C. (2019) Classification of Arctic multilayer clouds using radiosonde and radar data in Svalbard , Atmospheric Chemistry and Physics, 19 , pp. 5111-5126 . doi:10.5194/acp-19-5111-2019 <https://doi.org/10.5194/acp-19-5111-2019> , hdl:10013/epic.0530c768-8951-4d84-a388-df48e7acc781 |
op_doi |
https://doi.org/10.5194/acp-19-5111-2019 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
19 |
container_issue |
7 |
container_start_page |
5111 |
op_container_end_page |
5126 |
_version_ |
1766301321639493632 |