Sea-Ice Deformations at the Submesoscale and Below During the Melting Season

被引：0
作者：
Kimura, Satoshi [1 ]
Ukita, Jinro [2 ]
Fujiwara, Amane [1 ]
Kikuchi, Takashi [1 ]
机构：
[1] Japan Agcy Marine Earth Sci & Technol, Yokosuka, Japan
[2] Univ Tokyo, Bunkyo, Japan
来源：
GEOPHYSICAL RESEARCH LETTERS | 2025年 / 52卷 / 04期
关键词：
FLOW RULES; RHEOLOGY; MODEL; SIMULATIONS; STABILITY; POSEDNESS; SATELLITE; FRACTURE; ANGLES; LAW;
D O I：
10.1029/2024GL109046
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Many sea-ice models formulate sea-ice rheology by a viscous-plastic approach with an elliptical yield curve and a normal flow rule. However, it remains uncertain whether this formulation is suitable for finer-resolution climate models in the warming Arctic. We analyze sea-ice deformation using half-hourly Global Positioning System (GPS) data initially spaced approximately 100 m to 10 km apart from March-July 2020 and 2022 in the Beaufort Gyre. Our findings show the prevalence of shear-dominated deformation and the greater capacity for persistence in the convergence-dominated deformation compared to divergence-dominated deformation. The former supports the sine-lens yield curve, while the latter supports the teardrop yield curve. Our results examine the validity of the elliptical yield curve during sea-ice breakup and advocate the need for a combination of sine-lens and teardrop yield curves from data-supported arguments.
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页数：11
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