Circulation patterns in the lower Arctic Ocean derived from geochemical data

Circulation patterns in the lower Arctic Ocean derived from geochemical data
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根据地球化学数据得出的北冰洋下游环流模式

DOI:
10.1007/s10872-018-0472-2
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发表时间:
2018
影响因子:
2.3
通讯作者:
Watanabe Y.W.
Watanabe Y.W.
中科院分区:
地球科学4区
文献类型:
--
作者:
Ikeda M.;Tanaka S.S.;Watanabe Y.W.

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利用《北冰洋水化学图集》(HAAC)中的地球化学数据集以及基于磷酸盐和溶解氧的地球化学守恒参数PO 4 * 的数据,确定了北冰洋的气候水团结构。在500米深度以上的上层海洋中,HAAC被发现可靠地描绘了太平洋起源水(P-Water)和南极起源水(A-Water)之间的边界,该边界在表面附近135°E-45°W对齐,但随深度逆时针旋转。因此,北极和大西洋交换高硅酸盐的P-水和低硅酸盐的A-水。统计分析了1500 m以下大洋下部的PO 4 ~* 场,结果表明欧亚海盆接收低PO 4 ~* 的北欧海深水,这些深水是从格陵兰海沿沿着海底流动的。确定了从上层海洋到下层海洋的航线。只有南部的加拿大盆地,从楚科奇海和博福特海接收水,具有高的PO 4 * 水平;其余的美亚盆地接收低PO 4 * 水从拉普捷夫海和/或巴伦支海。欧亚海盆从弗拉姆海峡和中间层接收中等水平的PO 4 *。中间层的水逐渐从较低的海洋向上移动,并返回大西洋,夹带地下部分。可能是高PO 4 * 水偶尔从上层海洋沿沿着格陵兰流下,使欧亚盆地异质。
Climatological water-mass structures were identified in the Arctic Ocean using the geochemical dataset in theHydrochemical Atlas of the Arctic Ocean(HAAC) as well as data on a geochemically conserved parameter, PO4*, based on phosphate and dissolved oxygen. In the upper ocean above a depth of 500 m, the HAAC was found to reliably depict the boundary between Pacific-Origin Water (P-Water) and Atlantic-Origin Water (A-Water), which is aligned 135°E–45°W near the surface but rotates counterclockwise with depth. Thus, the Arctic and Atlantic oceans exchange high-silicate P-Water and low-silicate A-Water. The PO4* field in the lower ocean below a depth of 1500 m was analyzed statistically, and the results indicated that the Eurasian Basin receives low-PO4* Nordic Seas Deep Water, which flows along the bottom from the Greenland Sea. The routes from the upper ocean to the lower ocean were determined. Only the southern portion of the Canada Basin, which receives water from the Chukchi and Beaufort Seas, has high PO4* levels; the rest of the Amerasian Basin receives low-PO4* water from the Laptev Sea and/or the Barents Sea. The Eurasian Basin receives moderate levels of PO4* from the Fram Strait and from the intermediate layer. The intermediate-layer water gradually travels up from the lower ocean and returns to the Atlantic, entraining the subsurface portion. It is likely that high-PO4* water occasionally flows down from the upper ocean along Greenland, making the Eurasian Basin heterogeneous.
海洋波弗特环流对风和海冰运动的延迟响应:对北冰洋太平洋区海冰覆盖变化的影响
DOI: 10.1007/s10872-015-0276-6
发表时间: 2015
影响因子: 2.3
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DOI: --
发表时间: 2014
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发表时间: 2011
影响因子: 3
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