http://hotair.com/archives/2015/01/18/ooops-nasa-now-38-sure-2014-was-warmest-year-on-record/
Ooops. NASA now “38% sure” 2014 was warmest year on record
posted at 9:31 am on January 18, 2015 by Jazz Shaw
The Nasa climate scientists who claimed 2014 set a new record for global warmth last night admitted they were only 38 per cent sure this was true…
The claim made headlines around the world, but yesterday it emerged that GISS’s analysis – based on readings from more than 3,000 measuring stations worldwide – is subject to a margin of error. Nasa admits this means it is far from certain that 2014 set a record at all.
Yet the Nasa press release failed to mention this, as well as the fact that the alleged ‘record’ amounted to an increase over 2010, the previous ‘warmest year’, of just two-hundredths of a degree – or 0.02C. The margin of error is said by scientists to be approximately 0.1C – several times as much.
Very expensive satellites were deployed over thirty years ago because it was known that surface based reporting stations did not give great accuracy for global temperature calculations. There are many siting and location issues. Urban areas are over represented and there are large areas of the earth’s surface that are not measured, not to mention instrumentation issues and many other factors. They are also more vulnerable to manipulation from agencies and governments that have political motivation to skew the data.
If one only uses data only from rural areas most reporting stations show no warming for approximately 20 years. It is also quite a coincidence that stations in third world countries who are hoping to receive compensation through the UN often seem to show warming that is more pronounced than stations in other areas.
So what do the satellites which have none of these issues show? They show that average temperatures have not warmed for 18 years and 3 months now. This is called the “pause” and it is universally recognized even by many warmists.