2019 Annual Temperature

The December 2019 temperature was up by 0.12C from November at  1.01C relative to 1961-1990. This completes the annual global average temperature for 2019 making it the second warmest year at 0.86C. This is  just 0.015C cooler than 2016. All these values are calculated using GHCN-V4 and HadSST3 and spherical triangulation.

Here is the temperature distribution for December

Notice in particular the warmer than average temperatures across Australia, parts of the US and Northern Europe plus the ocean hot spot west of New Zealand.

Here are the final trend results for 2019

Recent Monthly temperature trends

 

and the Annual trends showing 2019 slightly cooler than 2016.

Annual average temperature anomalies

So 2019 ended with a warm December and Australia suffering terrible bush fires. I will be there in 3 weeks time and was planning to first visit the Blue Mountains.

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5 Responses to 2019 Annual Temperature

  1. Mercurio says:

    How does this 18 year temperature record compare to the 20th century record?
    Is it even an important comparison to be made?

    As a non-expert, I am curious at to what conclusions you draw from the data. Seems to play into the hand of panic-stricken climate catastrophists, does it not?

  2. John K. says:

    What’s the margin of error? When you’re talking about tenths (and hundredths) of a degree, that may be important to know.

    • Clive Best says:

      John,

      There are two different sources of error. The first is a statistical error and this is rather small for recent years since V4 has over 14000 stations. Likewise HadSST3 has good coverage. I estimate this error at <0.01C.

      However there is a second systematic source of error whinch depends on the spatial integration method that is used to calculate the global average. Obviously I think my method is the best although the SST data has already been processed by Hadley into 5*5 degree bins. Other groups use different averaging methods and some use ERSST3 instead for SST.

      If you compare my result with Nick Stokes you find that usually we agree to within 0.03C each month. He uses ERSST3. So while it makes sense to quote values to within 0.01C, different methodologies only agree to within roughly 0.02C

  3. Scott Jones says:

    The fires should be mostly out by the time you get to Australia. Good rain predicted here this week.

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