Researchers studying 'doomsday glacier' make worrying discovery

[jaxexpat]

4. That is huge, if provable. Source?

It's a curious thing, because air temperature and sea rise phenomenon are occurring exponentially. Feed-back loops (some enormous) have been observed to support that aspect. What you say has, for me, a challenging logic, 18" rise in 16 years and only 6" rise in the following 20 years. That infers that the underlying phenomenon is slowing, stopped or reversing. Do the calculations require human extinction in order to hold up?