If the sea-level ice shelves that took many centuries to form suddenly un-form in a short period, it shows rapid warming of the sea in the region.

As I understand it, the Larsen-A and B ice shelves may not have existed 2000 years and formed after that, perhaps reaching their maxium size during the Little Ice Age. The Larsen-B ice shelf disintegrated in 2002.

Does anyone know: What does our current science consider anomalous: an ice sheet or no ice sheet at that location?