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首页> 外文期刊>Oceanology >Interannual Variability of Water Mass Properties over the Transatlantic Section along 60deg N in the Subpolar North Atlantic
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Interannual Variability of Water Mass Properties over the Transatlantic Section along 60deg N in the Subpolar North Atlantic

机译：北极子极北大西洋沿60deg N跨大西洋剖面水质性质的年际变化

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摘要

The thermohaline structure of the subpolar part of the North Atlantic is described in detail on the basis of the data of four surveys over the transatlantic section in 1997-2004 along 60deg N.For 8 years,a two-mode structure of the Labrador Sea Water was observed in the Irminger Basin.On the basis of the data obtained in 1997,it is shown that the formation of the Labrador Sea Water (LSW) can occur not only in the Labrador Sea,but also in the southern part of the Irminger Sea.The analysis of the data of four surveys made it possible to conclude that the modified East Iceland Water permanently penetrates into the subpolar region of the Atlantic Ocean.The analysis of the interannual variability of the characteristics of the water masses made it possible to distinguish that,from the end of the 1990s to 2003,a reconstruction of the Meridional Overturning Circulation (MOC) was observed in the North Atlantic.During this period,a gradual destruction of the dense deep LSW core occurred.The newly formed LSW of relatively low density propagated in the upper layer.The influence of the flow of the Deep Denmark Strait Overflow Water and the Iceland-Scotland Overflow Water spreading from the Arctic seas through the Denmark Strait increased.The northward transport of warm and saline surface and intermediate waters of the southern origin increased.It is possible that the cooling and a decrease in the salinity of the Labrador Sea Water found in the Irminger Basin in 2004 indicates the formation of the next mode of the meridional circulation.
机译：基于1997-2004年北大西洋60度北大西洋横断面的四次调查数据，详细描述了北大西洋亚极部分的热盐结构。长达8年的时间，拉布拉多海水的两种模式结构根据1997年获得的数据，表明拉布拉多海水（LSW）的形成不仅可能发生在拉布拉多海，而且可能发生在厄明格海南部通过对四次调查的数据进行分析，有可能得出结论，即改良后的东冰岛水永久渗透到大西洋的亚极地区。对水团特征的年际变化的分析使得有可能区分从1990年代末到2003年，在北大西洋观察到子午翻转循环（MOC）的重建。在此期间，密集的LSW深部岩心逐渐被破坏。 y形成了低密度的LSW扩散到上层。丹麦深海峡溢流水和冰岛-苏格兰溢水从北极海经丹麦海峡扩散的影响增加了。南部起源的地表水和中间水增加了.2004年在艾明格盆地发现的拉布拉多海水的降温和盐度降低可能表明子午循环的下一个模式的形成。

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