Retrieving compressive sea ice strength in the Beaufort Sea using the inverse visco-plastic model

IF 1.5 4区地球科学 Q3 ECOLOGY

Polar Science Pub Date : 2024-09-01 DOI:10.1016/j.polar.2024.101107

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引用次数: 0

Abstract

We apply a simplified 2d Visco-Plastic (VP) sea ice model with a spatially variable representation of the sea ice rheological parameters for retrieving maximum compressive sea ice strength from satellite and in situ observations. A set of Observing System Simulation Experiments (OSSEs) demonstrates feasibility of optimizing rheological parameter of the VP sea ice model through the variational data assimilation approach during the periods of strong sea ice convergence if accurate sea ice observations are available. Following this strategy, the developed variational data assimilation VP model was applied to the sea ice velocity (https://nsidc.org/data/nsidc-0116/versions/4), sea ice concentration (https://nsidc.org/data/) and CryoSat-2 sea ice thickness observations collected in the vicinity of three moorings in the Beaufort Sea during periods of intensive sea ice convergence. Ice velocities from moorings and atmospheric wind speed (NCEP-NCAR) were used as well. Our results show that conventional maximum compressive sea ice strength (Hibler, 1979) may depend on sea ice thickness or other parameters partly controlled by the sea ice thickness, which is driven by the seasonal cycle.

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利用反粘弹性模型检索波弗特海的海冰抗压强度

我们应用简化的二维粘弹性（VP）海冰模型，通过海冰流变参数的空间可变表示，从卫星和观测数据中获取最大压缩海冰强度。一组观测系统模拟实验（OSSEs）证明了在有精确海冰观测数据的情况下，通过变分数据同化方法在强海冰会聚期优化 VP 海冰模型流变参数的可行性。按照这一策略，将开发的变分数据同化 VP 模型应用于波弗特海在海冰密集辐合期间在三个锚系设备附近收集的海冰速度（）、海冰浓度（）和 CryoSat-2 海冰厚度观测数据。同时还使用了来自锚系设备的冰速和大气风速（NCEP-NCAR）。我们的结果表明，传统的海冰最大抗压强度（Hibler，1979 年）可能取决于海冰厚度或部分受海冰厚度控制的其他参数，而海冰厚度则受季节周期驱动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polar Science ECOLOGY-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

3.90

自引率

5.60%

发文量

期刊介绍： Polar Science is an international, peer-reviewed quarterly journal. It is dedicated to publishing original research articles for sciences relating to the polar regions of the Earth and other planets. Polar Science aims to cover 15 disciplines which are listed below; they cover most aspects of physical sciences, geosciences and life sciences, together with engineering and social sciences. Articles should attract the interest of broad polar science communities, and not be limited to the interests of those who work under specific research subjects. Polar Science also has an Open Archive whereby published articles are made freely available from ScienceDirect after an embargo period of 24 months from the date of publication. - Space and upper atmosphere physics - Atmospheric science/climatology - Glaciology - Oceanography/sea ice studies - Geology/petrology - Solid earth geophysics/seismology - Marine Earth science - Geomorphology/Cenozoic-Quaternary geology - Meteoritics - Terrestrial biology - Marine biology - Animal ecology - Environment - Polar Engineering - Humanities and social sciences.