Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
The alternative text for this image may have been generated using AI.
Sea-level curves for Southern Scandinavia7,9,20,23,24,25,26,27 are plotted on common altitude scale, with period of maximum sea-levels highlighted to show variability.