Before NOAA data tampering, temperatures at the capital of Greenland have been declining for a century.

Data.GISS: GISS Surface Temperature Analysis

But to be fair, temperatures have actually been declining for at least 1,000 years – when Vikings farms were surrounded by forests.

CHANGING CLIMATE INDICATED IN ARCTIC – NYTimes.com

Nuuk is now a frozen wasteland. There are no trees growing.

This is all very inconvenient for climate scamsters at the US government, so they simply alter the data, to turn a Greenland cooling trend into a warming trend.

Data.GISS: GISS Surface Temperature Analysis