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北极海冰主应力方向的间歇性。

Intermittency of principal stress directions within Arctic sea ice.

作者信息

Weiss Jérôme

机构信息

Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS, 54 rue Molière, BP 96, 38402 St Martin d'Hères Cedex, France.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2008 May;77(5 Pt 2):056106. doi: 10.1103/PhysRevE.77.056106. Epub 2008 May 27.

DOI:10.1103/PhysRevE.77.056106
PMID:18643135
Abstract

The brittle deformation of Arctic sea ice is not only characterized by strong spatial heterogeneity as well as intermittency of stress and strain-rate amplitudes, but also by an intermittency of principal stress directions, with power law statistics of angular fluctuations, long-range correlations in time, and multifractal scaling. This intermittency is much more pronounced than that of wind directions, i.e., is not a direct inheritance of the turbulent forcing.

摘要

北极海冰的脆性变形不仅具有强烈的空间非均匀性以及应力和应变率幅值的间歇性,还具有主应力方向的间歇性,呈现出角度波动的幂律统计、时间上的长程相关性以及多重分形标度。这种间歇性比风向的间歇性更为显著,即并非湍流强迫的直接遗传。

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