I believe part of the concern is that this ice shelf is holding back land ice that would cause sea level rise. Quoting Wikipedia on the Larsen C shelf: "After

I believe part of the concern is that this ice shelf is holding back land ice that would cause sea level rise. Quoting Wikipedia on the Larsen C shelf: "After breaking away from Antarctica, it will leave the remainder of the shelf vulnerable to future collapse. If all the ice that the Larsen C shelf currently holds back were to enter the sea, it is estimated that global waters would rise by 10 cm (3.9 in)." https://en.wikipedia.org/wiki/Larsen_Ice_Shelf#Larsen_C https://en.wikipedia.org/wiki/Larsen_Ice_Shelf#Larsen_C