Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean
Abstract The ice-ocean drag coefficient $$C_{w}$$ C w and turning angle $$\theta_{w}$$ θ w are crucial parameters in ice-ocean coupled simulations, determining the transfer of momentum between the two media. These parameters are often treated as constants regardless of the static stability at the ic...
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ftdoajarticles:oai:doaj.org/article:76e4ff65925f48f199fc55a9654b6f85 2024-09-09T19:23:59+00:00 Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean Yusuke Kawaguchi Mario Hoppmann Kunio Shirasawa Benjamin Rabe Ivan Kuznetsov 2024-07-01T00:00:00Z https://doi.org/10.1038/s41598-024-66124-8 https://doaj.org/article/76e4ff65925f48f199fc55a9654b6f85 EN eng Nature Portfolio https://doi.org/10.1038/s41598-024-66124-8 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-024-66124-8 2045-2322 https://doaj.org/article/76e4ff65925f48f199fc55a9654b6f85 Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024) Ice-ocean boundary layer Drag coefficient Turning angle Static stability Heat balance Sea ice dynamics Medicine R Science Q article 2024 ftdoajarticles https://doi.org/10.1038/s41598-024-66124-8 2024-08-05T17:48:59Z Abstract The ice-ocean drag coefficient $$C_{w}$$ C w and turning angle $$\theta_{w}$$ θ w are crucial parameters in ice-ocean coupled simulations, determining the transfer of momentum between the two media. These parameters are often treated as constants regardless of the static stability at the ice-ocean interface. This study investigates the variability of $$C_{w}$$ C w and $$\theta_{w}$$ θ w based on direct observations of thermal and kinetic energy balance. The observations were conducted beneath multiyear ice packs widely across the central Arctic during a period transitioning from ablation to refreezing, indicating significant variability of $$C_{w}$$ C w = 1–130 $$\times$$ × 10−3 and $$\theta_{w}$$ θ w = − 19–1° at 5 m depth. Comparing different stations, the observations suggest a pronounced dependence of $$C_{w}$$ C w on the stability parameter ( $$\mu$$ μ ) resulting from mechanical and buoyant forcing. $$C_{w}$$ C w rapidly decays with increasing $$\mu$$ μ , indicating that the ice-to-ocean momentum transfer is enhanced for neutral or unstable conditions, while it is weakened for stable conditions. In addition, observed vertical profiles of currents revealed that $$|\theta_{w}|$$ | θ w | tends to be smaller for unstable and larger for stable conditions. We suggest that numerical simulations using constant values could result in an underestimate of large-scale near-surface currents during the ice growing period. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Scientific Reports 14 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice-ocean boundary layer Drag coefficient Turning angle Static stability Heat balance Sea ice dynamics Medicine R Science Q |
spellingShingle |
Ice-ocean boundary layer Drag coefficient Turning angle Static stability Heat balance Sea ice dynamics Medicine R Science Q Yusuke Kawaguchi Mario Hoppmann Kunio Shirasawa Benjamin Rabe Ivan Kuznetsov Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean |
topic_facet |
Ice-ocean boundary layer Drag coefficient Turning angle Static stability Heat balance Sea ice dynamics Medicine R Science Q |
description |
Abstract The ice-ocean drag coefficient $$C_{w}$$ C w and turning angle $$\theta_{w}$$ θ w are crucial parameters in ice-ocean coupled simulations, determining the transfer of momentum between the two media. These parameters are often treated as constants regardless of the static stability at the ice-ocean interface. This study investigates the variability of $$C_{w}$$ C w and $$\theta_{w}$$ θ w based on direct observations of thermal and kinetic energy balance. The observations were conducted beneath multiyear ice packs widely across the central Arctic during a period transitioning from ablation to refreezing, indicating significant variability of $$C_{w}$$ C w = 1–130 $$\times$$ × 10−3 and $$\theta_{w}$$ θ w = − 19–1° at 5 m depth. Comparing different stations, the observations suggest a pronounced dependence of $$C_{w}$$ C w on the stability parameter ( $$\mu$$ μ ) resulting from mechanical and buoyant forcing. $$C_{w}$$ C w rapidly decays with increasing $$\mu$$ μ , indicating that the ice-to-ocean momentum transfer is enhanced for neutral or unstable conditions, while it is weakened for stable conditions. In addition, observed vertical profiles of currents revealed that $$|\theta_{w}|$$ | θ w | tends to be smaller for unstable and larger for stable conditions. We suggest that numerical simulations using constant values could result in an underestimate of large-scale near-surface currents during the ice growing period. |
format |
Article in Journal/Newspaper |
author |
Yusuke Kawaguchi Mario Hoppmann Kunio Shirasawa Benjamin Rabe Ivan Kuznetsov |
author_facet |
Yusuke Kawaguchi Mario Hoppmann Kunio Shirasawa Benjamin Rabe Ivan Kuznetsov |
author_sort |
Yusuke Kawaguchi |
title |
Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean |
title_short |
Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean |
title_full |
Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean |
title_fullStr |
Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean |
title_full_unstemmed |
Dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central Arctic Ocean |
title_sort |
dependency of the drag coefficient on boundary layer stability beneath drifting sea ice in the central arctic ocean |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41598-024-66124-8 https://doaj.org/article/76e4ff65925f48f199fc55a9654b6f85 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Scientific Reports, Vol 14, Iss 1, Pp 1-16 (2024) |
op_relation |
https://doi.org/10.1038/s41598-024-66124-8 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-024-66124-8 2045-2322 https://doaj.org/article/76e4ff65925f48f199fc55a9654b6f85 |
op_doi |
https://doi.org/10.1038/s41598-024-66124-8 |
container_title |
Scientific Reports |
container_volume |
14 |
container_issue |
1 |
_version_ |
1809893938075533312 |