Physical length scales of wind-blown snow redistribution and accumulation on relatively smooth Arctic first-year sea ice
Physical length scales of wind-blown snow redistribution and accumulation on relatively smooth Arctic first-year sea ice
复制标题
相对光滑的北极第一年海冰上风雪重新分布和积累的物理长度尺度
DOI：
10.1088/1748-9326/ab3b8d
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发表时间：
2019
影响因子：
6.7
通讯作者：
B. Else
中科院分区：
文献类型：
--
作者：
W. Moon;V. Nandan;R. Scharien;J. Wilkinson;J. Yackel;A. Barrett;Isobel R. Lawrence;R. Segal;J. Stroeve;Mallik S. Mahmud;P. Duke;B. Else
对加拿大北极地区剑桥湾附近（2014年、2016年和2017年）和阿拉斯加北极地区埃尔森泻湖附近（2003年和2006年）获得的相对光滑的北极第一年海冰的积雪厚度测量结果进行了分析，以量化物理长度尺度及其相关尺度行为。我们使用多重分形时间加权去趋势波动分析方法来检测两个独立研究地点的两个主要物理长度尺度。我们的结果表明，雪丘形成的物理过程是一致的，并且风是形成雪厚度变化和重新分布的主要过程。一个尺度（约 10 m）似乎与雪“沙丘”的形成有关，而另一个尺度（30 至 100 m 之间）可能与雪丘的各种相互作用有关，例如合并、崩解和横向连接。结果表明，水平海冰上的雪表现出自组织特征。
Snow thickness measurements over relatively smooth Arctic first-year sea ice, obtained near Cambridge Bay in the Canadian Arctic (2014, 2016 and 2017) and near Elson Lagoon in the Alaskan Arctic (2003 and 2006), are analyzed to quantify physical length-scales and their relevant scaling behaviors. We use the multi-fractal temporally weighted detrended fluctuation analysis method to detect two major physical length-scales from the two independent study locations. Our results suggest that physical processes underlying the formation of snow dunes are consistent and that the wind is the main process shaping the snow thickness variability and redistribution. One scale, around 10 m, appears to be related to the formation of the snow ‘dunes’, while the other scale, between 30 and 100 m, is likely associated with the various interactions of the snow dunes such as merging, calving and lateral linking. Results imply that snow on level sea ice shows self-organized characteristics.