Sensitivity of palaeotidal models of the northwest European shelf seas to glacial isostatic adjustment since the Last Glacial Maximum
Sensitivity of palaeotidal models of the northwest European shelf seas to glacial isostatic adjustment since the Last Glacial Maximum
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欧洲西北部陆架海古潮汐模型对末次盛冰期以来冰川均衡调整的敏感性
DOI：
10.1016/j.quascirev.2016.08.034
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发表时间：
2016
影响因子：
4
通讯作者：
Katsuto Uehara
中科院分区：
文献类型：
--
作者：
S. Ward;S. Neill;J. Scourse;S. Bradley;Katsuto Uehara
自末次盛冰期以来，由于海平面上升以及对近场和远场冰盖消融的复杂均衡响应，欧洲西北部陆架海相对海平面变化的空间和时间分布变化很大。由于相对海平面变化的复杂模式，该区域是模拟海平面显着变化对陆架潮汐动力学影响的理想焦点。潮汐动力学的变化影响潮差、潮汐混合锋的位置、潮汐能的耗散、陆架海生物地球化学和沉积物输送路径。近年来，该地区的冰川均衡调整 (GIA) 建模取得了重大进展，早期的欧洲西北部陆架海古潮汐模型是使用约束较差的 GIA 模型的输出作为生成古水深网格的输入而开发的。我们使用该地区最新且约束良好的 GIA 模型作为西北欧洲陆架海的新高分辨率三维潮汐模型 (ROMS) 的古地形输入。通过关注从末次盛冰期（取 21ka BP）至今 1ka 时间片的模型输出，我们证明了模拟潮汐动力学的时空变化对相对海平面分布非常敏感。新的高分辨率古潮汐模型被认为是对以前的深度平均古潮汐模型的重大改进，特别是在输出用于沉积物迁移研究时，考虑近床应力至关重要，以及限制海平面指数点。
The spatial and temporal distribution of relative sea-level change over the northwest European shelf seas has varied considerably since the Last Glacial Maximum, due to eustatic sea-level rise and a complex isostatic response to deglaciation of both near- and far-field ice sheets. Because of the complex pattern of relative sea level changes, the region is an ideal focus for modelling the impact of significant sea-level change on shelf sea tidal dynamics. Changes in tidal dynamics influence tidal range, the location of tidal mixing fronts, dissipation of tidal energy, shelf sea biogeochemistry and sediment transport pathways. Significant advancements in glacial isostatic adjustment (GIA) modelling of the region have been made in recent years, and earlier palaeotidal models of the northwest European shelf seas were developed using output from less well-constrained GIA models as input to generate palaeobathymetric grids. We use the most up-to-date and well-constrained GIA model for the region as palaeotopographic input for a new high resolution, three-dimensional tidal model (ROMS) of the northwest European shelf seas. With focus on model output for 1 ka time slices from the Last Glacial Maximum (taken as being 21 ka BP) to present day, we demonstrate that spatial and temporal changes in simulated tidal dynamics are very sensitive to relative sea-level distribution. The new high resolution palaeotidal model is considered a significant improvement on previous depth-averaged palaeotidal models, in particular where the outputs are to be used in sediment transport studies, where consideration of the near-bed stress is critical, and for constraining sea level index points.
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影响因子：
2.3
作者：
Green, Johan A. Mattias
通讯作者：
Green, Johan A. Mattias
贝叶斯模型对爱尔兰海冰流的消退进行建模
影响因子：
2.3
作者：
Chiverrell R
通讯作者：
Chiverrell R
影响因子：
2.8
作者：
Sturt F
通讯作者：
Sturt F
影响因子：
2.8
作者：
Bradley, S. L.;Milne, G. A.;Orliac, E. J.
通讯作者：
Orliac, E. J.