I thought the receding glaciers were causing the oceans to rise.
This trips up many people.
Note that glaciers are not all alike. One factor is how much is on land versus on sea/how much is in isostatic equilibrium. Wet-base versus Dry-base is an important factor. Thickness can vary.
Note that warming on the oceans --> can lead to more humid air that makes it farther inland prior to being droppped out --> leading to changes in snowfall --> leading to changes in glacial advance.
It's not simple.
Hard to tell from this snippet what is actualy happening. In Iceland glaciers will slide downhill due to warming near their base from natural and gradual geothermal heat. A huge flood and debris flow took out a large bridge a few years ago due to a more instant volcanic event as I recall.
But, other than the sliding motion (perhaps they are - hence the word “surge”), glaciers move downhill not because they are melting, but because they are GROWING. I believe Antartica has been colder than average over the last many years than normal. (And the Arctic has been warmer).
“I thought the receding glaciers were causing the oceans to rise.”
Advancing ice=global warming.
Retreating ice=global warming.
In the ol’ days they would talk about moisture budgets ‘n stuff. Now we know better!
/sarc.