当前位置: X-MOL 学术J. Geophys. Res. Oceans › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Multi‐Century Impacts of Ice Sheet Retreat on Sea Level and Ocean Tides in Hudson Bay
Journal of Geophysical Research: Oceans ( IF 3.6 ) Pub Date : 2020-10-31 , DOI: 10.1029/2019jc015104
A.‐M. Hayden 1, 2 , S.‐B. Wilmes 3 , N. Gomez 1 , J. A. M. Green 3 , L. Pan 1 , H. Han 1 , N. R. Golledge 4
Affiliation  

Past and modern large‐scale ice sheet loss results in geographically variable sea level changes. At present, in Hudson Bay, Canada, sea level is decreasing due to glacial isostatic adjustment, which represents a departure from the globally averaged sea level rise. However, there are large uncertainties in future sea level trends with further polar ice sheet retreat in the coming centuries. Sea level changes affect ocean tides considerably because tides are highly sensitive to changes in bathymetry. Here, we present multi‐century sea level projections associated with a suite of past and future ice loss scenarios and consider the impact of these changes on ocean tides using an established tidal model. Modern tides in Hudson Bay are poorly resolved due to large uncertainties in bathymetry. To establish an initial condition for our simulations, we constrain bathymetry in the bay using tide observations. Due to gravitational, Earth rotational and deformational effects, Greenland ice loss will produce a small sea level fall in the bay, while Antarctic ice loss will produce a larger than average sea level rise. Our results show that the response of the Antarctic ice sheet to climate change strongly impacts the magnitude and sign of future sea level and tidal amplitude changes in the region, with the largest changes predicted in Hudson Strait and Foxe Basin. We emphasize that further constraints on bathymetry and accurate projections of sea level and tides in Hudson Bay are imperative for assessing the associated impacts on coastal communities and ecosystems.

中文翻译:

冰川退缩对哈德逊湾海平面和洋潮的多世纪影响

过去和现代大规模的冰盖损失导致地理上变化的海平面变化。目前,在加拿大哈德逊湾,由于冰川等静压调整,海平面正在下降,这与全球平均海平面上升有所背离。但是,未来海平面趋势存在很大不确定性,未来几个世纪极地冰盖将进一步退缩。海平面变化对潮汐有很大影响,因为潮汐对测深的变化高度敏感。在这里,我们提出了与过去和将来的一系列冰流失量情景相关的多世纪海平面预测,并使用已建立的潮汐模型来考虑这些变化对海洋潮汐的影响。由于测深的巨大不确定性,哈德逊湾的现代潮汐难以解决。为了为我们的模拟建立初始条件,我们使用潮汐观测值来限制海湾的测深。由于重力,地球自转和变形的影响,格陵兰的冰损失将使海湾中的海平面下降幅度较小,而南极冰的损失将使海平面上升幅度大于平均水平。我们的结果表明,南极冰盖对气候变化的响应强烈影响了该地区未来海平面和潮汐幅值变化的幅度和迹象,其中最大的变化发生在哈德逊海峡和福克斯盆地。我们强调,进一步评估测深法的限制以及哈德逊湾海平面和潮汐的准确预测对于评估对沿海社区和生态系统的相关影响至关重要。格陵兰的冰损失将使海湾的海平面下降幅度较小,而南极冰的损失将使海平面的上升幅度大于平均水平。我们的结果表明,南极冰盖对气候变化的响应强烈影响了该地区未来海平面和潮汐幅值变化的幅度和迹象,其中最大的变化发生在哈德逊海峡和福克斯盆地。我们强调,对测深法进行进一步限制,并准确估计哈德逊湾的海平面和潮汐,对于评估对沿海社区和生态系统的相关影响至关重要。格陵兰的冰损失将使海湾的海平面下降幅度较小,而南极冰的损失将使海平面的上升幅度大于平均水平。我们的结果表明,南极冰盖对气候变化的响应强烈影响了该地区未来海平面和潮汐幅值变化的幅度和迹象,其中最大的变化发生在哈德逊海峡和福克斯盆地。我们强调,对测深法进行进一步限制,并准确估计哈德逊湾的海平面和潮汐,对于评估对沿海社区和生态系统的相关影响至关重要。我们的结果表明,南极冰盖对气候变化的响应强烈影响了该地区未来海平面和潮汐幅值变化的幅度和迹象,其中最大的变化发生在哈德逊海峡和福克斯盆地。我们强调,对测深法进行进一步限制,并准确估计哈德逊湾的海平面和潮汐,对于评估对沿海社区和生态系统的相关影响至关重要。我们的结果表明,南极冰盖对气候变化的响应强烈影响了该地区未来海平面和潮汐幅值变化的幅度和迹象,其中最大的变化发生在哈德逊海峡和福克斯盆地。我们强调,对测深法进行进一步限制,并准确估计哈德逊湾的海平面和潮汐,对于评估对沿海社区和生态系统的相关影响至关重要。
更新日期:2020-11-25
down
wechat
bug