Thanks for your question…
I asked Kelly Hogan about your question. Kelly is a geologist from the Scott Polar Research Institute in Cambridge. She says that it is very difficult to give a single value for the rate at which ice is retreating around the world as it does so at different speeds.
Glaciers which are high in the mountains in some parts of the world, such as the Grinnell Glacier in the USA, are retreating at a rate of 10’s of metres per year. In the Antarctic it currently seems that it is much slower. There is not much evidence that most of the Antarctic ice sheet has changed in the last 150 years but some local changes are underway. Sea ice extent appears to be decreasing, and some ice shelves are breaking up. The most spectacular of these attract considerable publicity, particularly the collapse of part of Larsen Ice Shelf in 1995.