The ice shelves in eastern Antarctic peninsula seem to have been thinning since around 1700, leaving ice shelves such as Larsen B vulnerable to their recent break-up as human-caused climate change took hold
Source:
https://www.newscientist.com/article/2220977-collapse-of-antarctic-ice-may-have-been-centuries-in-the-making/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home