Tuesday, June 16, 2015

Watching the global thermometer - year to date GISTemp with May 2015

Sou | 3:29 AM Go to the first of 8 comments. Add a comment
This is the update of the progressive year-to-date global average surface temperature, from GISS. This update includes May.

Worth noting

  • May was an average of 0.71°C above the 1951-1980 mean.
  • April was adjusted back to 0.71°C from 0.75°C 
  • May this year was equal second hottest with May 2012.
  • Every month this year has been at least 0.71°C above the 1951-1980 mean. 
  • The progressive year to date average up to and including May is 0.77°C above the 1951-1980 mean.

Explaining the chart

The chart is a progressive year to date average for all years from 1995 to the present. What that means is for January each year, it just shows the anomaly for January. For February it shows the average of January and February for each year. For March, its the average of the monthly anomaly from January to March.

If you look at December, each year shows the annual average temperature for the full year. For November, each year has the average for the year up to November, not including December. (As before, I've made it extra large because of all the fine detail.)

Data Source: NASA GISS

2015 is still ahead of the pack so far, just ahead of 2010 for this time of the year. The years to watch are 2014, 2010 and 2005. I've plotted them with slightly thicker lines so they stand out more easily.

The coldest year of the lot was 1996, which still ended up more than 0.3°C above the 1950 to 1981 average.  The next time someone tries to tell you that "it hasn't warmed since 1996" then show them this chart :)

Related articles and data file

I promised to provide a data file because the chart is so messy. You can access it here on Google drive.

Watching the global thermometer - year to date with April 2015 and the same with YTD to March this year.


  1. This year could get warmer as the El Nino develops. 2010 got progressively cooler.

  2. Remember El Nino warming must not be confused with AGW because the warmth in the Pacific is caused by El Ninos (Did I get that right Bob?)

  3. Show & Tell the Truth and They Will Come...

    That would be a good slogan for you, Sou.

    The Flying Right 'cherry pick' the data they want. The only global satellite thermometer is managed by deniers Roy Spencer and John Christy, so it's highly likely that Polluting Industries and Toxic Empires have influence over that dataset. The Billionaires use Front Groups to deliver cash to Congress, Physicists, Climatologists, Bloggers etc... to Brainwash People...

    The Saddest Thing About Politics is Watching Millions of Working Poor Conservatives Line Up to Vote GOP Reflubitcan to Give These Billionaires a Better Life.

    In other News... Bernie Sanders Has Struck a Powerful Chord with the Working Poor, the Majority of This Country
    And All He is Doing is Telling the Truth
    Tell the Truth and They Will Come...

    The Corporate/Billionaire/Wall Street Finance Class Will Attack Bernie Sanders with Everything They've Got Because He Scares the Absolute Shyt out of Them. Watch for it.

    Officially Enter the Khazillionaire Khazar Mafia Look Alike, Donald Trump, announced his campaign for president today. Something like this... "Because of Obama, This Country Needs a Debt & Currencies Reset, as Pres I Will Bomb Our Enemies Back Into the Stone Age... Now That's a Reset That Works!!!"

    Somebody needs to tell this FOOL that we don't have many friends left that are not coaxed to be friends by Flying Monkey Peace Bombs! We were told by Dubya that Bombing Iraq Into the Stone Age would make us safer. Look how that's going... I'm Sure Trump Has All His 'Lie By Dates' Worked Out to Bring Bernie Down.

    1. Uhm, there's quite a bit of conspiracy ideation in what you just wrote.

    2. Yeah, what is this? Do you want me to spell it out in detail or shut the heck up?

    3. There is more than one satellite global temperature dataset.

  4. A question about El Nino. Am I right that 2010 was so hot because of an El Nino that was developing in 2009, while later in 2010 a La Nina was developing? And that that is the reason why 2010 was getting colder overtime?
    If the 2015 El Nino continues to increase in strength, will that mean that 2015 will get a similar pattern like 2014 or 2005? And if this El Nino reaches its maximum in late 2015/early 2016, could 2016 be even stronger?

    1. Probably, Estador. Here's a chart I did - El Nino is orange and La Nina is blue. From this article.

      A link to BoM history of ENSO years.

      It's hard to predict the future though.


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