Over the last twelve years NASA and NOAA have rewritten Reykjavik, Iceland’s temperature history, to turn a long term cooling trend into a warming trend.
Data.GISS: GISS Surface Temperature Analysis (v2)
Data.GISS: GISS Surface Temperature Analysis (v4)
Long ago they were caught stating the reason why they do these things – they cannot account for the decline. The pal-reviewed Climategate whitewash never washed them clean, and the subsequent torturing of temperature records further contaminate them.