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.
中科院分区:
文献类型:
--
作者:
Ikeda M.;Tanaka S.S.;Watanabe Y.W.
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.
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DOI:
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DOI:
10.1016/j.dsr.2011.06.001
发表时间:
2011
影响因子:
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