Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean
In polar oceans, ice-band patterns are frequently observed around the ice edge in the winter, where sea ice production and melting continually occur. A better understanding of such fundamental processes in marginal ice zones (MIZs) may be key to accurate predictions of sea-ice evolution. Ice bands e...
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Online Access: | http://hdl.handle.net/2115/87600 https://doi.org/10.1016/j.pocean.2020.102474 |
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/87600 2023-05-15T18:17:35+02:00 Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean Saiki, Ryu Mitsudera, Humio Fujisaki-Manome, Ayumi Kimura, Noriaki Ukita, Jinro Toyota, Takenobu Nakamura, Tomohiro http://hdl.handle.net/2115/87600 https://doi.org/10.1016/j.pocean.2020.102474 eng eng Elsevier http://hdl.handle.net/2115/87600 Progress in Oceanography, 190: 102474 http://dx.doi.org/10.1016/j.pocean.2020.102474 ©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND 450 article (author version) fthokunivhus https://doi.org/10.1016/j.pocean.2020.102474 2023-01-06T01:01:57Z In polar oceans, ice-band patterns are frequently observed around the ice edge in the winter, where sea ice production and melting continually occur. A better understanding of such fundamental processes in marginal ice zones (MIZs) may be key to accurate predictions of sea-ice evolution. Ice bands exhibit approximately 10-km-scale regular band spacings, and their long axes turn to the counter-clockwise (clockwise) with respect to the wind direction in the Northern (Southern) Hemisphere. We formulate a theory that is relevant for a continuously stratified ocean and compare the theoretical results with the numerical-model results and satellite observations. The numerical results quantitatively agree well with the theory. In particular, resonance condition, on which the phase speed of internal wave matches with the ice-band propagation speed, is always satisfied even if wind speed becomes slow. This is because there are an infinite number of baroclinic modes in continuously stratified ocean. We also show that an ice-band pattern emerges from a random initial ice concentration even though the wind is homogeneous. Plume-like ice bands along ice edge, which are frequently observed by satellites, are well explained by the pattern formation from random noise. Various effects of the ice-band formation were explored with respect to the relationship between the initial ice concentration and the wind direction, ice roughness, ice thickness, temporal variation of wind, and the Coriolis parameter. Article in Journal/Newspaper Sea ice Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Progress in Oceanography 190 102474 |
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Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
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fthokunivhus |
language |
English |
topic |
450 |
spellingShingle |
450 Saiki, Ryu Mitsudera, Humio Fujisaki-Manome, Ayumi Kimura, Noriaki Ukita, Jinro Toyota, Takenobu Nakamura, Tomohiro Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
topic_facet |
450 |
description |
In polar oceans, ice-band patterns are frequently observed around the ice edge in the winter, where sea ice production and melting continually occur. A better understanding of such fundamental processes in marginal ice zones (MIZs) may be key to accurate predictions of sea-ice evolution. Ice bands exhibit approximately 10-km-scale regular band spacings, and their long axes turn to the counter-clockwise (clockwise) with respect to the wind direction in the Northern (Southern) Hemisphere. We formulate a theory that is relevant for a continuously stratified ocean and compare the theoretical results with the numerical-model results and satellite observations. The numerical results quantitatively agree well with the theory. In particular, resonance condition, on which the phase speed of internal wave matches with the ice-band propagation speed, is always satisfied even if wind speed becomes slow. This is because there are an infinite number of baroclinic modes in continuously stratified ocean. We also show that an ice-band pattern emerges from a random initial ice concentration even though the wind is homogeneous. Plume-like ice bands along ice edge, which are frequently observed by satellites, are well explained by the pattern formation from random noise. Various effects of the ice-band formation were explored with respect to the relationship between the initial ice concentration and the wind direction, ice roughness, ice thickness, temporal variation of wind, and the Coriolis parameter. |
format |
Article in Journal/Newspaper |
author |
Saiki, Ryu Mitsudera, Humio Fujisaki-Manome, Ayumi Kimura, Noriaki Ukita, Jinro Toyota, Takenobu Nakamura, Tomohiro |
author_facet |
Saiki, Ryu Mitsudera, Humio Fujisaki-Manome, Ayumi Kimura, Noriaki Ukita, Jinro Toyota, Takenobu Nakamura, Tomohiro |
author_sort |
Saiki, Ryu |
title |
Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
title_short |
Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
title_full |
Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
title_fullStr |
Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
title_full_unstemmed |
Mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
title_sort |
mechanism of ice-band pattern formation caused by resonant interaction between sea ice and internal waves in a continuously stratified ocean |
publisher |
Elsevier |
url |
http://hdl.handle.net/2115/87600 https://doi.org/10.1016/j.pocean.2020.102474 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
http://hdl.handle.net/2115/87600 Progress in Oceanography, 190: 102474 http://dx.doi.org/10.1016/j.pocean.2020.102474 |
op_rights |
©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ https://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.pocean.2020.102474 |
container_title |
Progress in Oceanography |
container_volume |
190 |
container_start_page |
102474 |
_version_ |
1766191947485020160 |