Lateglacial and Holocene relative sea-level changes and first evidence for the Storegga tsunami in Sutherland, Scotland
Lateglacial and Holocene relative sea-level changes and first evidence for the Storegga tsunami in Sutherland, Scotland
复制标题
晚冰期和全新世相对海平面变化以及苏格兰萨瑟兰斯托雷加海啸的第一个证据
DOI：
10.1002/jqs.2862
复制
发表时间：
2016
影响因子：
2.3
通讯作者：
Long A
中科院分区：
文献类型：
--
作者：
Long A
我们从苏格兰大陆北部海岸重建了欧洲西北部最长的相对海平面（RSL）记录之一，使用了从Eriboll湖（萨瑟兰）的三个地点收集的数据，并将其与该地区的其他研究相结合。冰川消退后，RSL从+6 - 8 m OD的冰川高点下降(地形基准面= ca。平均海平面)在约15 k cal a BP至低于现在，然后上升到全新世早期的高点，并在约7至3 k cal a BP之间保持在约+1 m OD，然后下降到现在。我们没有发现苏格兰大陆西北（Lochinver, Loch Laxford）、北部（Loch Eriboll）和东北（Wick）海岸的全新世冰川均衡调整存在显著差异的证据。这表明该地区冰川迅速消退，整个地区的冰负荷差异不大。在Eriboll湖的一个地点，我们报告了苏格兰大陆全新世早期Storegga海啸最西端的沉积证据。通过海啸波模型预测了Eriboll湖Storegga海啸的存在，这表明海啸影响了整个苏格兰北部海岸，也可能影响了苏格兰西北部的大西洋海岸线。
We reconstruct one of the longest relative sea‐level (RSL) records in north‐west Europe from the north coast of mainland Scotland, using data collected from three sites in Loch Eriboll (Sutherland) that we combine with other studies from the region. Following deglaciation, RSL fell from a Lateglacial highstand of +6−8 m OD (Ordnance Datum = ca. mean sea level) at ca. 15 k cal a BP to below present, then rose to an early Holocene highstand and remained at ca. +1 m OD between ca. 7 and 3 k cal a BP, before falling to present. We find no evidence for significant differential Holocene glacio‐isostatic adjustment between sites on the north‐west (Lochinver, Loch Laxford), north (Loch Eriboll) and north‐east (Wick) coast of mainland Scotland. This suggests that the region was rapidly deglaciated and there was little difference in ice loads across the region. From one site at the head of Loch Eriboll we report the most westerly sedimentary evidence for the early Holocene Storegga tsunami on the Scottish mainland. The presence of the Storegga tsunami in Loch Eriboll is predicted by a tsunami wave model, which suggests that the tsunami impacted the entire north coast of Scotland and probably also the Atlantic coastline of north‐west Scotland.