Characterizing the size and shape of sea ice floes.
Characterizing the size and shape of sea ice floes.
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DOI：
10.1038/srep10226
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发表时间：
2015-05-27
影响因子：
4.6
通讯作者：
Lagomarsino MC
中科院分区：
文献类型：
--
作者：
Gherardi M;Lagomarsino MC
直接和遥感监测北极和南极地区的漂冰对气候研究很重要，但缺乏统一的模拟框架。因此，对数据的解释，以及对测量内容的决定，对不同的科学领域来说都是一个挑战。为了解决这一问题，我们使用统计物理工具分析了来自北半球和南半球四个不同地点的海冰卫星图像，并测量了浮冰（漂浮的冰块）的大小和伸长。我们发现：(i)浮冰的大小遵循一个分布，可以用一个长度尺度很好地近似表征，我们在随机破碎模型的框架中讨论了这一点；（ii）它们的形状与圆形的偏差可以通过基于随机Voronoi镶嵌的冻结聚结的几何模型以非常高的精度再现，用单个自由参数表示形状紊乱。虽然物理解释仍然是开放的，但这提倡将参数和作为极地地区环境的两个独立指标，这很容易通过遥感获得。
Monitoring drift ice in the Arctic and Antarctic regions directly and by remote sensing is important for the study of climate, but a unified modeling framework is lacking. Hence, interpretation of the data, as well as the decision of what to measure, represent a challenge for different fields of science. To address this point, we analyzed, using statistical physics tools, satellite images of sea ice from four different locations in both the northern and southern hemispheres, and measured the size and the elongation of ice floes (floating pieces of ice). We find that (i) floe size follows a distribution that can be characterized with good approximation by a single length scale , which we discuss in the framework of stochastic fragmentation models, and (ii) the deviation of their shape from circularity is reproduced with remarkable precision by a geometric model of coalescence by freezing, based on random Voronoi tessellations, with a single free parameter expressing the shape disorder. Although the physical interpretations remain open, this advocates the parameters and as two independent indicators of the environment in the polar regions, which are easily accessible by remote sensing.
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影响因子：
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作者：
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通讯作者：
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DOI：
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发表时间：
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影响因子：
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DOI：
10.1073/pnas.1301552110
发表时间：
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影响因子：
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