Prior to the year 2000, NASA showed US temperatures cooling since the 1930?s, and 1934 much warmer than 1998…
Right after the year 2000, NASA and NOAA dramatically altered US climate history, making the past much colder and the present much warmer. The [graphs] below shows how NASA cooled 1934 and warmed 1998, to make 1998 the hottest year in US history instead of 1934. This alteration turned a long term cooling trend since 1930 into a warming trend.
Steven Goddard again:
I’ve shown how NASA and NOAA have dramatically altered the US temperature record, and they are doing the same thing in other countries, like Iceland and Australia – almost always cooling the past, which creates the appearance of warming.
I’ve since come to understand that the annual average temperature for 2013, which the Bureau claimed was a record, is in fact a wholly contrived valued based on modeling of temperatures, rather than the averaging of actual recorded values."