DOI: 10.5194/tc-15-431-2021
论文题名: Wave-sea-ice interactions in a brittle rheological framework
作者: Boutin G. ; Williams T. ; Rampal P. ; Olason E. ; Lique C.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 1 起始页码: 431
结束页码: 457
语种: 英语
英文关键词: ice cover
; ice drift
; ice-ocean interaction
; marginal ice zone
; pack ice
; rheology
; sea ice
; Arctic Ocean
; Barents Sea
英文摘要: As sea ice extent decreases in the Arctic, surface ocean waves have more time and space to develop and grow, exposing the marginal ice zone (MIZ) to more frequent and more energetic wave events. Waves can fragment the ice cover over tens of kilometres, and the prospect of increasing wave activity has sparked recent interest in the interactions between wave-induced sea ice fragmentation and lateral melting. The impact of this fragmentation on sea ice dynamics, however, remains mostly unknown, although it is thought that fragmented sea ice experiences less resistance to deformation than pack ice. Here, we introduce a new coupled framework involving the spectral wave model WAVEWATCH III and the sea ice model neXtSIM, which includes a Maxwell elasto-brittle rheology. This rheological framework enables the model to efficiently track and keep a "memory"of the level of sea ice damage. We propose that the level of sea ice damage increases when wave-induced fragmentation occurs. We used this coupled modelling system to investigate the potential impact of such a local mechanism on sea ice kinematics. Focusing on the Barents Sea, we found that the internal stress decrease of sea ice resulting from its fragmentation by waves resulted in a more dynamical MIZ, particularly in areas where sea ice is compact. Sea ice drift is enhanced for both on-ice and off-ice wind conditions. Our results stress the importance of considering wave-sea-ice interactions for forecast applications. They also suggest that waves likely modulate the area of sea ice that is advected away from the pack by the ocean, potentially contributing to the observed past, current and future sea ice cover decline in the Arctic. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164663
Appears in Collections: 气候变化与战略
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作者单位: Nansen Environmental and Remote Sensing Center, The Bjerknes Centre for Climate Research, Bergen, Norway; Cnrs, Institut de Géophysique de l'Environnement, Grenoble, France; Univ. Brest, Cnrs, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale, Iuem, Brest, 29280, France
Recommended Citation:
Boutin G.,Williams T.,Rampal P.,et al. Wave-sea-ice interactions in a brittle rheological framework[J]. Cryosphere,2021-01-01,15(1)