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首页> 外文OA文献 >Inter-annual to decadal sea-level variability in the coastal zones of the Norwegian and Siberian Seas: The role of atmospheric forcing
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Inter-annual to decadal sea-level variability in the coastal zones of the Norwegian and Siberian Seas: The role of atmospheric forcing

机译：挪威和西伯利亚海域沿海地区年际到年代际海平面变化：大气强迫的作用

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Inter-annual to decadal sea-level variations from tide gauge records in the coastal zones of the Norwegian and Siberian Seas are examined for the period 1950–2010 using a combination of hydrographic observations, wind data, and theory. We identify two large areas of highly coherent sea-level variability: one that includes the Norwegian, Barents, and Kara Seas, and another one that includes the Laptev, East Siberian, and Chukchi Seas. We provide evidence of a new contribution to the sea-level variability along the Norwegian coast associated with the poleward propagation of sea-level fluctuations along the eastern boundary of the North Atlantic. When this propagating signal is combined with the local wind, we are able to explain over 70% of the variance along the Norwegian coast. The steric component explains ~61% of the sea-level (corrected for the inverse barometer) variability along the Norwegian coast. The high coherency between the sea level along the Norwegian coast and that in the Barents and Kara Seas suggests that part of the Norwegian signal propagates further north into these regions. We introduce an atmospheric vorticity index that explains much of the sea-level variability in the Laptev, East Siberian, and Chukchi Seas with correlations ranging from 0.73 to 0.81. In the East Siberian Sea, we identify a sea-level increase of ~22 cm between 2000 and 2003, which is partly explained by the vorticity index, and a decline of ~15 cm after 2003, which we relate to the strengthening of the Beaufort Gyre.
机译：结合水文观测，风数据和理论，对1950-2010年期间挪威和西伯利亚海沿岸潮汐记录的年际至年代际海平面变化进行了研究。我们确定了两个高度一致的海平面变化大区域：一个区域包括挪威海，巴伦支海和卡拉海，另一个区域包括拉普捷夫海，东西伯利亚海和楚科奇海。我们提供了与北大西洋东部边界海平面波动的极向传播有关的挪威沿海海平面变化新贡献的证据。当此传播信号与当地风相结合时，我们就能解释挪威海岸沿岸70％以上的变化。空间成分解释了挪威沿海地区约61％的海平面（经反晴雨表校正）变化。挪威沿海海平面与巴伦支海和卡拉海海平面之间的高度连贯性表明，挪威信号的一部分向北传播到这些区域。我们引入了一个大气涡度指数，该指数解释了拉普捷夫，东西伯利亚和楚科奇海的大部分海平面变化，其相关性介于0.73至0.81之间。在东西伯利亚海，我们发现2000年至2003年之间的海平面上升了约22 cm，这在一定程度上可以由涡度指数解释，而在2003年之后则下降了约15 cm，这与Beaufort的加强有关回转

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