information:filtering, linguistic:voice_change, stylistic:style_transfer, quality:corruption, structural:expansion
Ice cover

The amount of water contained within glaciers directly influences global sea levels - sea level rise occurs if the glaciers retreat, and it drops if glaciers grow. Altogether, there appears to have been little change in sea level throughout the Younger Dryas. This is in contrast to rapid increases before and after, such as the Meltwater Pulse 1A. On the coasts, glacier advance and retreat also affects relative sea level. Western Norway experienced a relative sea level rise of 10 m (32 + 2 ⁄ 3 ft) as the Scandinavian ice sheet advanced. Notably, ice sheet advance in this area appears to have begun about 600 years before the global onset of the Younger Dryas. Underwater, the deposits of methane clathrate - methane frozen into ice - remained stable throughout the Younger Dryas, including during the rapid warming as it ended.