Welcome to Defra Data Services Forum

The CFB data must be maintained to ensure it reflects the best available information and sea level science. This 2018 update is the first carried out since the project first publication in 2011.

Work was undertaken to:

• apply new sea level science and improvements to statistical methods to update existing ESLs
• make use of nearly 10 years of additional observational data recorded at National Tide Gauge Network (NTGN) sites since the original study, supplementary data available at NTGN sites and gauge data provided by other organisations for non-NTGN sites
• extend the locations for which ESLs are provided to include Northern Ireland, Jersey, additional Scottish Islands and along priority tidal rivers and estuaries

The significant enhancements achieved by the project included improved tidal analysis, improved de-trending, an improved statistical model, improved confidence intervals and improved extremal index estimation.