On the coagulated pancake ice formation: Observation in the refreezing Chukchi Sea and comparison to the Antarctic consolidated pancake ice
On the coagulated pancake ice formation: Observation in the refreezing Chukchi Sea and comparison to the Antarctic consolidated pancake ice
复制标题
关于凝固薄饼冰的形成：在重新冻结的楚科奇海中的观察以及与南极凝固薄饼冰的比较
DOI：
10.1016/j.polar.2020.100622
复制
发表时间：
2021
期刊：
影响因子：
1.8
通讯作者：
Inoue Jun
中科院分区：
文献类型：
--
作者：
Nose Takehiko;Waseda Takuji;Kodaira Tsubasa;Inoue Jun
据了解，北冰洋西部薄饼冰的出现是波浪活动增加的结果。在 2018 年 R/V Mirai 实地考察期间，我们在重新结冰的楚科奇海进行了实地考察，获得了海冰形成的观测证据，该证据类似于煎饼循环（法拉兹/煎饼/固结煎饼冰），首次在南极洲发现并已知其普遍存在。显然，R/V Mirai遇到了一系列有利于产生凝固薄饼冰的环境条件，其形成过程与南极固结薄饼冰有关。我们研究了薄饼冰在两种不同环境中的形成方式：南极边缘冰区（MIZ）毗邻活跃的南极绕极地区，而北冰洋西部则被海冰和陆地包围。我们发现，这两种情况之间的一个关键区别是，由于北冰洋西部的波浪气候，漂流不太可能发生，这意味着凝固的薄饼冰比南极凝固的薄饼冰更薄。随着海冰范围的缩小，较薄的凝固薄冰可能会主导重新冻结的海洋，从而影响融化并可能影响更广泛的北极气候。
Emergence of pancake ice in the western Arctic Ocean is understood to be an effect of the increasing wave activity. During the 2018 R/V Mirai field campaign in the refreezing Chukchi Sea, we obtained observational evidence of sea ice formation that resembled the pancake cycle—frazil/pancake/consolidated pancake ice—first discovered and known to be ubiquitous in the Antarctic. Apparently, R/V Mirai encountered a sequence of environmental conditions that were conducive to producing coagulated pancake ice, of which the formation process was relatable to the Antarctic consolidated pancake ice. We investigate how pancake ice form in two different environments: the Antarctic marginal ice zone (MIZ) is adjacent to the vigorous Antarctic Circumpolar region whereas the western Arctic Ocean is surrounded by sea ice and land. We found that a key distinction between the two regimes is that rafting is less likely in the western Arctic Ocean due to its wave climate, meaning the coagulated pancake ice is thinner than the Antarctic consolidated pancake ice. As the sea ice extent declines, thinner coagulated pancake ice may dominate the refreezing ocean, which affects the melting and possibly the broader Arctic climate.