This only deals with Antarctica's contribution.
Michael Man one of the most eminent climate scientists said that he might quibble about some of Jim Hansen’s research but the conclusions were probably correct.
New Zealand’s government is still using the IPCC mid-range scenario of about 700 mm by 2100 even though it does not include melting glaciers and ice shelves and we have long passed any hope of restricting sea levels to those optimistic level.
We can’t change what is happening to the climate but we can plan our infrastructure to minimise the worst of the effects and it start by recognising the gravity of the situation. Here is a summary of some NZ infrastructure losses.