Morphology of single snow crystals growing in air at low temperatures
In order to study the morphology and the growth mechanisms of single snow crystals observed in polar areas, ice crystals were formed in air at 1.0 atm at -30℃ and various constant supersaturations. At low temperatures, minute plate-like and column-like ice crystals are formed at the same time under...
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Faculty of Science and Technology, Science University of Tokyo
1982
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ftnipr:oai:nipr.repo.nii.ac.jp:00001346 2023-05-15T13:47:59+02:00 Morphology of single snow crystals growing in air at low temperatures Takehiko Gonda Tetsuya Koike 1982-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1346 http://id.nii.ac.jp/1291/00001346/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1346&item_no=1&attribute_id=18&file_no=1 en eng Faculty of Science and Technology, Science University of Tokyo https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1346 http://id.nii.ac.jp/1291/00001346/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 24, 148-156(1982-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1346&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1982 ftnipr 2022-11-12T19:42:11Z In order to study the morphology and the growth mechanisms of single snow crystals observed in polar areas, ice crystals were formed in air at 1.0 atm at -30℃ and various constant supersaturations. At low temperatures, minute plate-like and column-like ice crystals are formed at the same time under the same environmental conditions; the morphology of these crystals depends not only on temperature but also on supersaturation, crystal size and macroscopic surface structure. From our experimental results, it is inferred that on diamond dust particles observed in Antarctica, when columnar ice crystals are predominantly observed, the supersaturation is lower than about 2%, while when plate-like ice crystals are predominantly observed, the supersaturation is higher than about 2%. Moreover, it is inferred that long solid prisms and rectangular snow crystals observed in polar areas grow by the screw dislocation mechanisms at a supersaturation lower than about 2%. Report Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan |
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Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
In order to study the morphology and the growth mechanisms of single snow crystals observed in polar areas, ice crystals were formed in air at 1.0 atm at -30℃ and various constant supersaturations. At low temperatures, minute plate-like and column-like ice crystals are formed at the same time under the same environmental conditions; the morphology of these crystals depends not only on temperature but also on supersaturation, crystal size and macroscopic surface structure. From our experimental results, it is inferred that on diamond dust particles observed in Antarctica, when columnar ice crystals are predominantly observed, the supersaturation is lower than about 2%, while when plate-like ice crystals are predominantly observed, the supersaturation is higher than about 2%. Moreover, it is inferred that long solid prisms and rectangular snow crystals observed in polar areas grow by the screw dislocation mechanisms at a supersaturation lower than about 2%. |
format |
Report |
author |
Takehiko Gonda Tetsuya Koike |
spellingShingle |
Takehiko Gonda Tetsuya Koike Morphology of single snow crystals growing in air at low temperatures |
author_facet |
Takehiko Gonda Tetsuya Koike |
author_sort |
Takehiko Gonda |
title |
Morphology of single snow crystals growing in air at low temperatures |
title_short |
Morphology of single snow crystals growing in air at low temperatures |
title_full |
Morphology of single snow crystals growing in air at low temperatures |
title_fullStr |
Morphology of single snow crystals growing in air at low temperatures |
title_full_unstemmed |
Morphology of single snow crystals growing in air at low temperatures |
title_sort |
morphology of single snow crystals growing in air at low temperatures |
publisher |
Faculty of Science and Technology, Science University of Tokyo |
publishDate |
1982 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1346 http://id.nii.ac.jp/1291/00001346/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1346&item_no=1&attribute_id=18&file_no=1 |
genre |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctica Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1346 http://id.nii.ac.jp/1291/00001346/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 24, 148-156(1982-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1346&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766248264477179904 |