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排序有图案的地面的自我组织
1Complex Systems Laboratory, Cecil and Ida Green Institute of Geophysics and Planetary Physics, University of California, San Diego, La Jolla, CA 92093, USA. mkessler@es.ucsc.edu
概括
在寒冷的环境中,自组织的石头和土壤模式源于结解周期. 这些循环产生反循环,将材料分类并移动石头,形成明显的圆形,多边形和条纹景观.
科学领域:
- 地质形态学 地质形态学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 极地和高阿尔卑斯山地区呈现出引人注目的岩石和土壤的自我组织模式.
- 这些有图案的地面特征包括圆圈,迷宫,多边形和条纹.
- 这些模式的形成与环境条件有关,特别是融周期.
研究的目的:
- 调查驱动图案地面自我组织的潜在机制.
- 了解地质形态模式形成中的反机制的相互作用.
- 基于物理过程,建模出不同模式的地面形态的出现.
主要方法:
- 开发和实施模拟融周期的数值模型.
- 整合了两个关键的反机制:冰晶体形成和石域挤压.
- 在不同的条件下对模型输出进行分析,以确定模式形成控制.
主要成果:
- 该模型成功地复制了各种有图案的地面特征,包括圆圈,迷宫,岛屿,多边形网络和条纹.
- 图案类型取决于特定反机制的主导地位:分类 (圆圈,迷宫,岛屿) 与石块域限制 (多边形).
- 山坡梯度被确定为条纹图案形成的关键因素.
结论:
- 结冰解周期是冷环境中自组织的石头和土壤模式的主要驱动因素.
- 冰镜分类和石头运输/封闭之间的相互作用决定了由此产生的地质形态模式.
- 数字建模提供了一个强大的框架,用于理解复杂的过程的模式地形形成.
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