Historic sea level records in the Thames Estuary, UK, 1911 - 1995

This dataset contains high and low water values manually digitised from historic hand-written tabulated ledgers, from the Port of London Authority (PLA). The dataset contains 463 years of data, from across 15 tide gauge sites along the Thames Estuary (bounding box = -0.3159°W, 51.3914°N, 1.3797°E, 51.8428°N), for the period 1911 to 1995. When these historic records are combined with digital records available from the PLA since 1995, the new sea level time-series spans the 111-year period from 1911 to 2021. London is one of the world's most important coastal cities and is located around the Thames Estuary. Quantifying changes in sea levels in the Thames Estuary over the 20^th century and early part of the 21^st century is vital to inform future management of flood risk in London. This dataset is of importance for ongoing monitoring of mean sea-level rise, and changes in tidal range and extreme sea levels in the Thames Estuary. The project was led by the School of Ocean and Earth Science, University of Southampton and the Environment Agency, with contributions from the Port of London Authority. The study contributes to the objectives of UK National Environment Research Council (NERC) project E-Rise: Earliest detection of sea-level rise accelerations to inform lead time to upgrade/replace coastal flood defence infrastructure (NE/P009069/1; I.D.H.). Data are made available under the NERC Open Government Licence.

该数据集包含从伦敦港务局（Port of London Authority, PLA）的历史性手写表格账簿资料中人工数字化处理的高低水位值。数据集涵盖1911年至1995年期间，泰晤士河口沿岸15个潮汐测量站点（tide gauge sites）的数据，其空间范围边界框（bounding box）为西经-0.3159°、北纬51.3914°、东经1.3797°、北纬51.8428°。将这些历史记录与PLA自1995年起提供的数字记录相结合，形成的新海平面时间序列（sea level time-series）覆盖1911年至2021年共111年周期。伦敦作为全球最重要的沿海城市之一，地处泰晤士河口区域。量化泰晤士河口在20世纪及21世纪初期的海平面变化，对于伦敦未来洪水风险管理的决策制定至关重要。该数据集对持续监测泰晤士河口平均海平面上升、潮差变化及极端海平面（extreme sea levels）具有重要价值。本项目由南安普顿大学海洋与地球科学学院及环境局牵头，伦敦港务局参与协作。研究旨在助力英国国家环境研究委员会（UK National Environment Research Council, NERC）的E-Rise项目目标——尽早探测海平面上升加速趋势，为沿海防洪基础设施升级或替换提供前置时间参考（项目编号：NE/P009069/1；负责人：I.D.H.）。数据依据NERC开放政府许可证（NERC Open Government Licence）对外提供。