Temperature Data — Can it be trusted?

Climate Science is full of strange and special temperature related climate moments.  Everything from the Mann Hockey Stick Graph to ClimateGate to simple silly mistakes at NASA’s own National Oceanic and Atmospheric Administration (NOAA).

NASA has a storied history of messing up temperature data.

  • In 2007, a skeptical blogger noticed a Y2K conversion error in NASA’s data set.  Many USA based weather stations were using raw rather than corrected data.  This mistake should have been easy to catch, but NASA missed it for years and years.  O000ps.
  • The gap in individual sites immediately after the Y2K conversion should have been a red flag for NASA as this station data point demonstrates:https://i2.wp.com/images.dailytech.com/nimage/5625_large_Detroit_lakes_GISSplot.jpg
  • When the error was found, 1934 was crowned the warmest year ever, replacing 1998.  In the years that followed,  1934 cooled down again…presto….it’s magic.
  • In 2008 NASA used September data in October for all of Siberia and incorrectly claimed that October of 2008 was the warmest on record.  A short while later it was corrected.
  • A satellite malfunction in 2009 caused NASA to miscalculate the summer Arctic Ice melt. Literally a California sized error.  They overstated the melt by a surface area the size of California.

For years I have been using East Anglia University in the UK as my source for temperature data.   Their data was more stable and matched Satellite data more consistently than did NOAA data.

Then last year I noticed something…

The East Anglia Data was changing too.   I’m not sure exactly when it changed…but it changed.   First lets look at some data published by East Anglia University in 2009:

and compare that to current data:

The charts look virtually identical until about 1940 and then things begin to get….well…odd.   The entire data set from 1940 to 1979 appears to have been shifted by perhaps 0.1 degree C.  Satellite data began in 1979.  All the data from 1979 to 2009 looks the same except for 1998 and 2005.   1998 suddenly got cooler and 2005 got warmer.  Why was the data changed in 2012?  What new information caused the change?

Most climate experts now claim that 2010 was the warmest year in history.   Maybe it wasn’t? And by history, they really mean the last 150 years.  Satellite data still shows a peak in 1998.

In 1977 the conventional wisdom was that a new ice age was coming.  Time Magazine ran a cover story discussing it


I wonder what the world will be saying 35 years from now?

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