Improved mapping of sea ice production in the Arctic Ocean using AMSR-E thin ice thickness algorithm
Improved mapping of sea ice production in the Arctic Ocean using AMSR-E thin ice thickness algorithm
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DOI：
10.1002/2013jc009749
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发表时间：
2014-06-01
影响因子：
3.6
通讯作者：
Tamura, Takeshi
中科院分区：
文献类型：
--
作者：
Iwamoto, Katsushi;Ohshima, Kay I.;Tamura, Takeshi
根据2002-2011年期间AMSRE卫星和大气再分析数据，以6.25公里的空间分辨率并使用新开发的坚冰掩模，得出了对北冰洋海冰生成量的新的和改进的估计。主要沿海冰穴的大量产冰得到了很好的证明。10个主要冰穴区的年累计产冰量约为1180 +/-70 km（3）。2002-2011年期间，每个冰穴的冰生产的年际变化。没有明显的关系之间的冰生产和最近急剧减少前夏季北极海冰范围。大多数冰间湖地区在秋季（10月至11月）表现出最大的冰产量，在近海地区被合并的浮冰覆盖之前。太平洋边缘冰区10 ~ 11月的海冰产量与该区域的夏季海冰面积呈负相关。2007年10月至11月的产冰量（创纪录的最小夏季冰范围）约为其他年份的两倍。高产冰区转移到高纬度地区，即，由于夏季冰缘的消退，加拿大盆地的深处。我们推测，由此产生的盐水输入量的增加可能会改变盆地的海洋结构，特别是加深冬季混合层。
New and improved estimates of sea ice production in the Arctic Ocean are derived from AMSRE satellite and atmospheric reanalysis data for the period 2002-2011, at a spatial resolution of 6.25 km and using a newly developed fast-ice mask. High ice production in the major coastal polynyas is well demonstrated. The total annual cumulative ice production in the major 10 polynya regions is about 1180 +/- 70km(3). The interannual variability of the ice production for each polynya is presented during 2002-2011. No obvious relationship is noted between the ice production and the recent drastic reduction in the preceding summer Arctic sea ice extent. Most polynya regions exhibit maximum ice production in autumn (October November), before areas offshore have been covered with consolidated pack ice. Sea ice production from October to November in the marginal ice zone of the Pacific Ocean sector is negatively correlated with summer ice extent there. The ice production from October to November of 2007 (a record minimum summer ice extent) was about twice as large as that in other years. The high ice production area shifted to higher latitudes i.e., toward the deep Canada Basin, due to the retreat of the summer ice edge. We speculate that the resultant increase in brine input could change the oceanic structure in the basin, specifically deepening the winter mixed layer.