Contrasting records of sea-level change in the eastern and western North Atlantic during the last 300 years

Contrasting records of sea-level change in the eastern and western North Atlantic during the last 300 years
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过去300年北大西洋东部和西部海平面变化的对比记录

DOI:
10.1016/j.epsl.2013.11.012
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发表时间:
2014
影响因子:
5.3
通讯作者:
Long A
Long A
中科院分区:
地球科学1区
文献类型:
--
作者:
Long A

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我们提出了一个新的300年的海平面重建从怀特岛(中央英吉利海峡,英国)的盐沼,我们比较其他盐沼和长验潮记录,以研究在北大西洋海平面变化的空间和时间变异。我们的新重建确定了相对海平面(RSL)的整体上升c。0.30自18世纪开始以来,以0.9±0.3 mm/年的速率增加了2.5 m。变量中的误差变点分析表明,数据集内的恒定速率没有统计学上显著的偏差。该重建与欧洲大西洋的其他验潮仪和盐沼记录大致相当,表明该地区过去150-300年来海平面的一致性。相比之下,我们确定了显着的差异,从北美东海岸的记录RSL的速度和时间。没有一个强大的世纪末/20世纪初的RSL加速与记录在盐沼沉积物沿着美国东部海岸线,特别是在一个良好的日期和精确的海平面重建从北卡罗来纳州。这表明,这部分的北卡罗来纳州海平面记录代表了一个区域特定的海平面加速。这是重要的,因为北卡罗来纳州记录已被用作,如果它是全球代表性的半经验参数化的过去和未来的海平面变化。我们的结论是,海平面变化的区域尺度差异突出的价值,使用几个,区域代表性的RSL记录时,校准和测试半经验模型的海平面对古记录。这是因为通过使用可能高估过去海平面上升的记录,这些模型有可能高估未来海平面上升。
We present a new 300-year sea-level reconstruction from a salt marsh on the Isle of Wight (central English Channel, UK) that we compare to other salt-marsh and long tide-gauge records to examine spatial and temporal variability in sea-level change in the North Atlantic. Our new reconstruction identifies an overall rise in relative sea level (RSL) of c. 0.30 m since the start of the eighteenth century at a rate of 0.9±0.3 mm yr− 1. Error-in-variables changepoint analysis indicates that there is no statistically significant deviation from a constant rate within the dataset. The reconstruction is broadly comparable to other tide-gauge and salt-marsh records from the European Atlantic, demonstrating coherence in sea level in this region over the last 150–300 years. In contrast, we identify significant differences in the rate and timing of RSL with records from the east coast of North America. The absence of a strong late 19th/early 20th century RSL acceleration contrasts with that recorded in salt marsh sediments along the eastern USA coastline, in particular in a well-dated and precise sea-level reconstruction from North Carolina. This suggests that this part of the North Carolina sea level record represents a regionally specific sea level acceleration. This is significant because the North Carolina record has been used as if it were globally representative within semi-empirical parameterisations of past and future sea-level change. We conclude that regional-scale differences of sea-level change highlight the value of using several, regionally representative RSL records when calibrating and testing semi-empirical models of sea level against palaeo-records. This is because by using records that potentially over-estimate sea-level rise in the past such models risk over-estimating sea-level rise in the future.
DOI: 10.5194/os-6-185-2010
发表时间: 2009
期刊: Ocean Science
影响因子: 3.2
作者:
P. Woodworth;N. Pouvreau;G. Wöppelmann
通讯作者: G. Wöppelmann
DOI: 10.1016/j.epsl.2012.06.045
发表时间: 2012-09-01
影响因子: 5.3
作者:
Brain, Matthew J.;Long, Antony J.;Parnell, Andrew C.
通讯作者: Parnell, Andrew C.
DOI: 10.1007/s10933-005-4925-4
发表时间: 2005
影响因子: 2.1
作者:
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通讯作者: P. Appleby
自 1768 年以来利物浦的高水位:英国最长的海平面记录
DOI: 10.1029/1999gl900323
发表时间: 1999
影响因子: 5.2
作者:
P. Woodworth
通讯作者: P. Woodworth
英国平均海平面的趋势
DOI: 10.1080/15210608709379549
发表时间: 1987
期刊: The Holocene
影响因子: --
作者:
P. Woodworth
通讯作者: P. Woodworth