Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI
Ice particle and cloud properties such as particle size, particle shape and number concentration influence the net radiation effect of cirrus clouds. Measurements of these features are of great interest for the improvement of weather and climate models, especially for the Arctic region. In this stud...
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ftdoajarticles:oai:doaj.org/article:ed58d605383e4aa889f1a4cf1c72d6e9 2023-05-15T14:58:07+02:00 Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI V. Wolf T. Kuhn M. Milz P. Voelger M. Krämer C. Rolf 2018-12-01T00:00:00Z https://doi.org/10.5194/acp-18-17371-2018 https://doaj.org/article/ed58d605383e4aa889f1a4cf1c72d6e9 EN eng Copernicus Publications https://www.atmos-chem-phys.net/18/17371/2018/acp-18-17371-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-17371-2018 1680-7316 1680-7324 https://doaj.org/article/ed58d605383e4aa889f1a4cf1c72d6e9 Atmospheric Chemistry and Physics, Vol 18, Pp 17371-17386 (2018) Physics QC1-999 Chemistry QD1-999 article 2018 ftdoajarticles https://doi.org/10.5194/acp-18-17371-2018 2022-12-31T05:17:28Z Ice particle and cloud properties such as particle size, particle shape and number concentration influence the net radiation effect of cirrus clouds. Measurements of these features are of great interest for the improvement of weather and climate models, especially for the Arctic region. In this study, balloon-borne in situ measurements of Arctic cirrus clouds have been analysed for the first time with respect to their origin. Eight cirrus cloud measurements have been carried out in Kiruna (68 ∘ N), Sweden, using the Balloon-borne Ice Cloud particle Imager (B-ICI). Ice particle diameters between 10 and 1200 µm have been found and the shape could be recognized from 20 µm upwards. Great variability in particle size and shape is observed. This cannot simply be explained by local environmental conditions. However, if sorted by cirrus origin, wind and weather conditions, the observed differences can be assessed. Number concentrations between 3 and 400 L −1 have been measured, but the number concentration has reached values above 100 L −1 only for two cases. These two cirrus clouds are of in situ origin and have been associated with waves. For all other measurements, the maximum ice particle concentration is below 50 L −1 and for one in situ origin cirrus case only 3 L −1 . In the case of in situ origin clouds, the particles are all smaller than 350 µm diameter. The PSDs for liquid origin clouds are much broader with particle sizes between 10 and 1200 µm . Furthermore, it is striking that in the case of in situ origin clouds almost all particles are compact (61 %) or irregular (25 %) when examining the particle shape. In liquid origin clouds, on the other hand, most particles are irregular (48 %), rosettes (25 %) or columnar (14 %). There are hardly any plates in cirrus regardless of their origin. It is also noticeable that in the case of liquid origin clouds the rosettes and columnar particles are almost all hollow. Article in Journal/Newspaper Arctic Kiruna Northern Sweden Directory of Open Access Journals: DOAJ Articles Arctic Kiruna Atmospheric Chemistry and Physics 18 23 17371 17386 |
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 V. Wolf T. Kuhn M. Milz P. Voelger M. Krämer C. Rolf Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Ice particle and cloud properties such as particle size, particle shape and number concentration influence the net radiation effect of cirrus clouds. Measurements of these features are of great interest for the improvement of weather and climate models, especially for the Arctic region. In this study, balloon-borne in situ measurements of Arctic cirrus clouds have been analysed for the first time with respect to their origin. Eight cirrus cloud measurements have been carried out in Kiruna (68 ∘ N), Sweden, using the Balloon-borne Ice Cloud particle Imager (B-ICI). Ice particle diameters between 10 and 1200 µm have been found and the shape could be recognized from 20 µm upwards. Great variability in particle size and shape is observed. This cannot simply be explained by local environmental conditions. However, if sorted by cirrus origin, wind and weather conditions, the observed differences can be assessed. Number concentrations between 3 and 400 L −1 have been measured, but the number concentration has reached values above 100 L −1 only for two cases. These two cirrus clouds are of in situ origin and have been associated with waves. For all other measurements, the maximum ice particle concentration is below 50 L −1 and for one in situ origin cirrus case only 3 L −1 . In the case of in situ origin clouds, the particles are all smaller than 350 µm diameter. The PSDs for liquid origin clouds are much broader with particle sizes between 10 and 1200 µm . Furthermore, it is striking that in the case of in situ origin clouds almost all particles are compact (61 %) or irregular (25 %) when examining the particle shape. In liquid origin clouds, on the other hand, most particles are irregular (48 %), rosettes (25 %) or columnar (14 %). There are hardly any plates in cirrus regardless of their origin. It is also noticeable that in the case of liquid origin clouds the rosettes and columnar particles are almost all hollow. |
format |
Article in Journal/Newspaper |
author |
V. Wolf T. Kuhn M. Milz P. Voelger M. Krämer C. Rolf |
author_facet |
V. Wolf T. Kuhn M. Milz P. Voelger M. Krämer C. Rolf |
author_sort |
V. Wolf |
title |
Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI |
title_short |
Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI |
title_full |
Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI |
title_fullStr |
Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI |
title_full_unstemmed |
Arctic ice clouds over northern Sweden: microphysical properties studied with the Balloon-borne Ice Cloud particle Imager B-ICI |
title_sort |
arctic ice clouds over northern sweden: microphysical properties studied with the balloon-borne ice cloud particle imager b-ici |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-17371-2018 https://doaj.org/article/ed58d605383e4aa889f1a4cf1c72d6e9 |
geographic |
Arctic Kiruna |
geographic_facet |
Arctic Kiruna |
genre |
Arctic Kiruna Northern Sweden |
genre_facet |
Arctic Kiruna Northern Sweden |
op_source |
Atmospheric Chemistry and Physics, Vol 18, Pp 17371-17386 (2018) |
op_relation |
https://www.atmos-chem-phys.net/18/17371/2018/acp-18-17371-2018.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-18-17371-2018 1680-7316 1680-7324 https://doaj.org/article/ed58d605383e4aa889f1a4cf1c72d6e9 |
op_doi |
https://doi.org/10.5194/acp-18-17371-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
23 |
container_start_page |
17371 |
op_container_end_page |
17386 |
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