Signal Global sea level up about 21cm since 1900

Summary

The report records that warming has helped raise global sea level by about 21 centimetres since 1900. Melting polar ice and the thermal expansion of seawater are given as the causes. The report expects sea level rise and similar climate impacts to continue even if the world reaches net zero and temperatures stabilise. In the UK, coastal erosion and more frequent flooding are making properties harder to insure, leaving many people exposed. Over the longer term, higher seas could disrupt UK ports and affect food imports. The report concludes that adaptation in both the built and the natural environment is needed to meet these challenges.