Sea Ice Characteristics and the Role of Sediment Inclusions in Deep-Sea Deposition: Arctic — Antarctic Comparisons
Sea Ice Characteristics and the Role of Sediment Inclusions in Deep-Sea Deposition: Arctic — Antarctic Comparisons
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海冰特征和沉积物包裹体在深海沉积中的作用：北极与南极的比较
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
P. Schlosser
中科院分区：
文献类型：
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作者：
S. Pfirman;M. Lange;I. Wollenburg;P. Schlosser
大部分北极海冰形成于沿盆地周边的浅大陆架上。脱离冰架的冰在经过弗拉姆海峡离开北极盆地之前，经过数年的波弗特环流和跨极流的运输。这种冰，特别是欧亚盆地的跨极流西伯利亚分支的冰，在陆架形成过程中可能会吸收大量的颗粒物质。随后的季节性表面融化和冰下的冬季冻结导致颗粒物质的表面积累。浮冰的上下漂移导致了复杂的冰地层和沉积物堆积的重新分布。相比之下，南极海冰只有有限的沉积物来源，大部分冰盖每年都在融化。通过对冰晶结构、c轴取向、盐度、冰芯δ 18O的分析以及对潜在沉积物输入的讨论，说明了北极和南极冰特征的这些变化。
Much of Arctic sea ice forms over the shallow continental shelves along the perimeter of the basin. Ice which escapes the shelf is transported several years within the Beaufort Gyre and Transpolar Drift stream, before exiting the Arctic Basin through Fram Strait. This ice, and especially that in the Siberian branch of the Transpolar Drift stream in the Eurasian Basin, may incorporate large quantities of particulate matter during formation on the shelf. Subsequent seasonal surface melting and winter freezing on the ice underside results in surface accumulation of particulate matter. Rafting of floes over and under each other results in a complex ice stratigraphy and redistribution of sediment accumulations. In contrast, Antarctic sea ice has only limited sources for sediment incorporation, and most of the ice-cover melts each year. These variations in Arctic and Antarctic ice characteristics are illustrated by analyses of ice crystal texture, c-axis orientations, salinity, δ 18O on ice cores and discussion of potential sediment input.