Satellite temperatures begin 1979, which was the coldest year on record in the Eastern Arctic

Data.GISS: GISS Surface Temperature Analysis (v2)

By starting the graph in 1979, there appears to be a correlation between temperature and CO2.

That relationship disappears with a longer view.

The real correlation with Iceland temperatures is the Atlantic Multidecadal Oscillation (AMO) – not CO2.

Wood for Trees: Interactive Graphs