Sedimentological storm and tsunami record of Loch Flugarth, Shetland Islands (UK) ...

• Main Authors: Hess, Katharina, Engel, Max, Koutsodendris, Andreas
• Format: Dataset
• Language: unknown
• Published: heiDATA 2023
• Subjects: Hess; North Atlantic
• Online Access: https://dx.doi.org/10.11588/data/qjezht; https://heidata.uni-heidelberg.de/citation?persistentId=doi:10.11588/data/QJEZHT

This dataset comprises the geochemical and sedimentological results of both publications Hess et al., 2023 and Engel et al., 2023. Hess et al., 2023: Severe storm flooding poses a major hazard to the coasts of north-western Europe. However, the long-term recurrence patterns of extreme coastal flooding and their governing factors are poorly understood. Therefore, high-resolution sedimentary records of past North Atlantic storm flooding are required. This multi-proxy study reconstructs storm-induced overwash processes from coastal lake sediments on the Shetland Islands using grain-size and geochemical data, and the re-analysis of historical data. The chronostratigraphy is based on Bayesian age–depth modelling using accelerator mass spectrometry 14C and 137Cs data. A high XRF-based Si/Ti ratio and the unimodal grain-size distribution link the sand layers to the beach and thus storm-induced overwash events. Periods with more frequent storm flooding occurred 980–1050, 1150–1300, 1450–1550, 1820–1900 and 1950–2000 ...