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Global Temperature Report – Jan 2014

February 28, 2014

By Paul Homewood

Jan 2014 0.26 0.30 0.51 0.70
Change from last month 0.10 0.03 0.02 0.10
12 month running average 0.20 0.22 0.49 0.61
Average 2004-13 0.23 0.19 0.47 0.59
  • UAH & HADCRUT slightly up, GISS & RSS with a slightly larger rise.
  • 12 Month average virtually unchanged, and still remains close to the 10-Year average.



Please note the 2004-13 average has been revised, as my original figures were wrong.






For anyone not familiar with all this, UAH and RSS are the two satellite datasets, that measure temperatures in the lower troposphere, from the surface up to about 8000 metres. The HADCRUT and GISS datasets measure surface temperatures.

All temperatures are presented as anomalies, i.e the difference, measured against a baseline, that is different across all four sets. (This means that the anomalies are not directly comparable between sets)

The baselines used are:

RSS – 1979-98

UAH – 1981-2010

HADCRUT – 1961-90

GISS – 1951-80

HADCRUT is maintained the UK Met Office’s Hadley Centre in conjunction with the Climatic Research Unit at the University of East Anglia.

GISS is run by the Goddard Institute for Space Studies at NASA.

UAH is the University of Alabama in Huntsville, and their dataset is part of an ongoing joint operation with NOAA and NASA.

RSS is a scientific research company, Remote Sensing Systems.


1) RSS

2) UAH



  1. Green Sand permalink
    March 1, 2014 12:03 am

    Thanks Paul

    Haven’t looked but at the complete make up but any increase in HadCRUT must come from a significant increase in CRUTEM (land)? Oceans are 70% and HadSST3 was down, but hey ho on we go with “a perfect lull then” h/t Alan Reed

  2. March 1, 2014 10:49 am

    – Am I right that in a warming world the 12 month average anomally would be higher than the 10 year average ?
    only GISS shows this by 0.02C. But to make any conclusions whether the average anomally is falling or rising is not reliable since even the other 3 have fallen by around the same, such a figure must be close to margin of error.

  3. March 1, 2014 2:39 pm

    Thanks, Paul.
    We’ll soon see what February was like according to UAH. For GISS we know; there was never a pause. HadCRUT4 will follow suit. HadCRUT3 less so. CET will probably reach a minimum.
    We’ll see what ENSO decides. The UAH global map of temperature anomalies will be very interesting.

    • March 2, 2014 12:20 pm

      “CET will probably reach a minimum.”

      What do you mean by that?

      Provisional CET fro February is 6.2c , 2.4c above 1961-90.

  4. David permalink
    March 5, 2014 7:41 am


    May I ask how the figures for the ‘Average 2004-2013’ row in the table are calculated? I can’t replicate them.

    For instance, the table shows Average 2004-2013 for HadCRUT4 as 0.50. I get an average of 0.45 for January between 2004 and 2013. For UAH the table shows 0.23; whereas I calculate 0.20 as the 10 year average for UAH between 2004 and 2013.


    • March 5, 2014 10:18 am

      Are you just looking at “Januaries”, David?

      My figures are the “120-Month” average, so are more comaparable with the 12-month average.

      • David permalink
        March 5, 2014 11:28 am

        Thanks Paul,

        I initially looked at January. but I also considered the 120 month averages . I get the following using that period (average 2004-13):

        RSS: 0.23
        UAH: 0.19
        HadCRUT4: 0.47
        GISS: 0.59

        I reloaded the UAH and RSS data from your link just to be sure I had the latest versions and I still come up with the above. (BTW, your link to GISS is to UKMO.)

      • March 5, 2014 6:35 pm

        Thanks, David.

        I’ll recheck my spreadsheet.

    • March 6, 2014 11:29 am

      It’s sorted now, thanks David.

      I had a semi colon instead of a colon in my “AVERAGE” formula for some reason!


  5. BigAl permalink
    March 5, 2014 11:07 am

    Hi Paul,
    Love your web page and daily updates. Nice to see critical analysis available for all.

    Where do you get your funding to do this? It would be good to post it so that your financial backing (if any) is clear.

    Keep up the good work!

    Sincerely Dr Alex Emodi

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