The gyre-scale circulation of the North Atlantic and sea level at Brest
The gyre-scale circulation of the North Atlantic and sea level at Brest
复制标题
北大西洋的环流和布雷斯特海平面
DOI：
10.5194/os-6-185-2010
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发表时间：
2009
期刊：
影响因子：
3.2
通讯作者：
G. Wöppelmann
中科院分区：
文献类型：
--
作者：
P. Woodworth;N. Pouvreau;G. Wöppelmann
抽象的。利用18世纪世纪中期开始的记录，研究了北大西洋环流尺度环流（由副热带环流中心附近的气压表示）与海洋东部边界测得的海平面之间的关系。这些时间序列的两倍，在这种关系的早期研究中所采用的。布雷斯特年平均海平面和平均高水位的近连续值，以及从陆地仪器压力记录和船舶航海日志资料得出的北大西洋东部气压场，已经被用来证明东部边界的海平面确实似乎与环流中心的气压有关（但对记录末尾附近的短数据小节有所保留）。这些发现证实了早期的结论，但时间跨度要长得多。这种关系至少可以部分解释从验潮仪和盐沼数据中获得的欧洲海平面记录中的世纪时间尺度加速。这一发现对解释欧洲大西洋沿岸观测到的海平面上升和加速具有重要意义，表明水的重新分配可能发挥重要作用，而不是（或以及）海洋体积的变化。
Abstract. The relationship between the gyre-scale circulation of the North Atlantic, represented by air pressure near to the centre of the sub-tropical gyre, and sea level measured at the eastern boundary of the ocean has been investigated using records commencing in the middle of the 18th century. These time series are twice as long as those employed in an earlier study of this relationship. Near-continuous values of annual mean sea level and mean high water from Brest, and air pressure fields for the eastern North Atlantic derived from terrestrial instrumental pressure records and ship logbook information, have been used to demonstrate that sea level on the eastern boundary does indeed appear to be related to air pressure at the centre of the gyre (subject to reservations concerning short sub-sections of data near to the ends of the records). These findings confirm the earlier conclusions but over much longer timescales. This relationship can explain at least part of the century timescale accelerations in European sea level records obtained from tide gauge and saltmarsh data. This finding has important implications for interpretation of the observed sea level rise and acceleration on the European Atlantic coast, suggesting that redistribution of water could play an important role instead of (or as well as) change in ocean volume.