Crystal Structure of Ice Accreted on an Ice Substrate
Abstract Thin ice deposits, grown on a prismatic ice substrate and the first layers of large deposits grown about a cylindrical ice collector, are studied. Experiments were performed at 30 m s –1 wind speed and T a near –20° C. Progressive structural changes in thin accretions with time of water-inj...
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Cambridge University Press (CUP)
1987
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Online Access: | http://dx.doi.org/10.1017/s0022143000005426 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000005426 |
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crcambridgeupr:10.1017/s0022143000005426 2024-03-03T08:46:00+00:00 Crystal Structure of Ice Accreted on an Ice Substrate Nasello, Olga B. Levi, Laura Prodi, Franco 1987 http://dx.doi.org/10.1017/s0022143000005426 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000005426 en eng Cambridge University Press (CUP) Journal of Glaciology volume 33, issue 113, page 120-122 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1987 crcambridgeupr https://doi.org/10.1017/s0022143000005426 2024-02-08T08:47:49Z Abstract Thin ice deposits, grown on a prismatic ice substrate and the first layers of large deposits grown about a cylindrical ice collector, are studied. Experiments were performed at 30 m s –1 wind speed and T a near –20° C. Progressive structural changes in thin accretions with time of water-injection were observed, when the substrate temperature was T s > –5°C. After 60s injection, which determined a deposit ~1 mm thick, the preferred orientation was established and the mean grain area was ~0.01 mm 2 . Such structural changes did not appear along the initial layers of thick deposits. These differed mainly from the subsequent zone because of the larger value of the preferred angle between the c -axis and the growth direction. These effects are discussed by considering the nucleation and orientation selection processes which occurred during droplet freezing and the annealing effects that occurred below the growth front. The different c -axis orientations in the initial and main zones are related to the different T s values during their formation. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 33 113 120 122 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Nasello, Olga B. Levi, Laura Prodi, Franco Crystal Structure of Ice Accreted on an Ice Substrate |
topic_facet |
Earth-Surface Processes |
description |
Abstract Thin ice deposits, grown on a prismatic ice substrate and the first layers of large deposits grown about a cylindrical ice collector, are studied. Experiments were performed at 30 m s –1 wind speed and T a near –20° C. Progressive structural changes in thin accretions with time of water-injection were observed, when the substrate temperature was T s > –5°C. After 60s injection, which determined a deposit ~1 mm thick, the preferred orientation was established and the mean grain area was ~0.01 mm 2 . Such structural changes did not appear along the initial layers of thick deposits. These differed mainly from the subsequent zone because of the larger value of the preferred angle between the c -axis and the growth direction. These effects are discussed by considering the nucleation and orientation selection processes which occurred during droplet freezing and the annealing effects that occurred below the growth front. The different c -axis orientations in the initial and main zones are related to the different T s values during their formation. |
format |
Article in Journal/Newspaper |
author |
Nasello, Olga B. Levi, Laura Prodi, Franco |
author_facet |
Nasello, Olga B. Levi, Laura Prodi, Franco |
author_sort |
Nasello, Olga B. |
title |
Crystal Structure of Ice Accreted on an Ice Substrate |
title_short |
Crystal Structure of Ice Accreted on an Ice Substrate |
title_full |
Crystal Structure of Ice Accreted on an Ice Substrate |
title_fullStr |
Crystal Structure of Ice Accreted on an Ice Substrate |
title_full_unstemmed |
Crystal Structure of Ice Accreted on an Ice Substrate |
title_sort |
crystal structure of ice accreted on an ice substrate |
publisher |
Cambridge University Press (CUP) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1017/s0022143000005426 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000005426 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 33, issue 113, page 120-122 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000005426 |
container_title |
Journal of Glaciology |
container_volume |
33 |
container_issue |
113 |
container_start_page |
120 |
op_container_end_page |
122 |
_version_ |
1792501798785777664 |