Warming stripes

A new set of climate visualisations, communicating the long term rise in temperatures for particular locations as a changing set of colours from blue to red. Each stripe represents the temperature of a single year, ordered from the earliest available data to now.

Annual temperatures in central England from 1772-2017

The colour scale goes from 7.6°C (dark blue) to 10.8°C (dark red) [data]

Annual temperatures for the contiguous USA from 1895-2017

The colour scale goes from 50.2°F (dark blue) to 55.0°F (dark red) [data]

Annual temperatures in Toronto from 1841-2017

The colour scale goes from 5.5°C (dark blue) to 11.0°C (dark red) [data]

Annual global temperatures from 1850-2017

The colour scale represents the change in global temperatures covering 1.35°C [data]

Annual temperatures in Germany from 1881-2017

The colour scale goes from 6.6°C (dark blue) to 10.3°C (dark red)

More locations coming soon…

70 thoughts on “Warming stripes

    1. Thanks Alexandra – the scale differs between the locations, but covers around 3K for the central England version. Could add a scale to each, but was trying to keep everything as simple as possible for these particular visualisations.

      1. Is there a way you could line up these graphs so that all have the same time frame by size? Yes, England’s graph would start sooner, but it is disturbing (haha) to me that I can’t accurately compare the areas as it is currently shown. Thanks!

      2. Nice, I’m guessing each graph is on a relative scale, which does an awesome job of showing what really matters (warming). Then for more details (e.g. how many degrees of warming and what that will cause), people can delve deeper into other graphs. Would be great if you could make a page that starts with your graphs, and then goes further into the details step by step.

      3. If dark blue represents 7.6 degrees C on one chart, 50.2 degrees, F on a second chart, and 5.5 degrees on a third chart, what’s the point?

        Also, why are 15 color gradations used on the global temperatures chart to show a change of only 1.35 degrees C of data?

  1. I agree with Alexandra … at least it needs a bit more explanation of what we are looking at.

    But very striking – can’t you get a few arts students to knock up something – it should be in the Tate Mod (Turbine Hall preferably)?

  2. I love the display, allows to visualize at the same time past variations, but also the global shift. And much “funnier” than XY chart.
    Still, I agree that it would be good to have some explanation and scale. I suppose it’s yearly average minus average for the period (or first year) (?)

  3. Great job. For some reason this is quicker to understand than any other charts I’ve seen (and understood).

  4. Do you think that (if there were any way for humans to have documented before 18xx) there’s a possibility that these weather increases could be a part of a cyclic weather pattern gradually over the centuries? Hot >cold>hot? My father and I had this conversation where he brought that up, and looking at your data I’m wondering about it. Either the planet was stable since created and was always around 5 degrees cooler; or it was freezing at inception and has been continuously getting hotter; or it has a constant state of change (which is what this existence is all about) and the temps will continue to go through the high/low phases.

  5. This is nicely done. It really shows the variation in various areas but how they all sow similar trends. I was wondering if there were any countries/cities etc whose data doesn’t fit and shows a trend from warmer to colder. It would be interesting if they existed.

  6. It’d be interesting to see points on the chart at the times we know elements that contribute to climate change were introduced e.g. automobile invented, etc.

  7. I love the visual simplicity and lack of distractions.

    If there were some roll-over effects, like roll over a line and it tells you the year, that would help people to delve more deeply into the information behind the images if they were inclined to do that.

  8. Pretty.
    It would be ideal to overlay the actual chart with error bars, show labelled axes with temperature and time, and then all information would be instantly visible.

  9. Using the HSV system with hue to show temperature from cold (blue )to hot( red) leaves the possibility of using saturation or value as a dimension to show the uncertainty. Low saturation would allow the least accurate temperatures to be shown fading into the mist (palest blue or pink ) of uncertainty or alternatively using low value for disappearing into the darkness.

    With 3 colour dimensions to play with perhaps you could do temperature(H), uncertainty(V) and percent of globe covered (S).

  10. I would purchase as a poster. any plans for that? Maybe as a find raiser the NCAS. OK, the NCAS christmas party, but I’m serious… a daily reminder on my office wall…

  11. Is it more illustrative or informative than a curve? Maybe not.
    But sure it’s always interesting to see new representations

  12. The earth systems have been placed in balance from its creation. It’s the increasing dramatics that threaten life…especially species less resistant to environmental change. It’s ironic that species most endowed with creative talent are creating the most dramatic disruptions of a balanced earthly environment. A violation of the first rule of science is the cause. “don’t fix it, if it’s not broke” ; street rule, “if you broke it, you own it.” Law of the harvest, “whatever a man is sowing, this he will also reap.”
    From bad to worst, the prophecy is being fulfilled…”may the worst be with you!”
    2012, the day after tomorrow

    1. Projected human extinction isn’t a reach too far. Although natural cyclical changes do cause extinctions, there is a point of no return in this progression and mankind is clearly involved.

  13. Thanks, great job !

    One tiny question thought :

    “The colour scale represents the change in global temperatures covering 1.35°C”
    I thought it meant there is 1.35°C from dark blue to dark red (same as other images), but ulyces.co says each shade represents a variation of 1.35°C (meaning a dozen times × 1.35°C scope).

    Can you enlighten me ?

  14. The bottom 2 graphs really already show a rising trend as early as 1900, which raises the question if there is not another mechanism.

  15. Brilliantly frightening. Thank you for creating Ed.

    Subject to temperature data availability, it would be interesting to create an open tool for users to be able to type in their city / region to create their own.

  16. Why show 1D data as a 2D plot? Stretching the y-axis adds no information and just makes the images unnecessarily big. I would just squeeze the y-axis 75% smaller or so…

  17. In Mexico open data portal there is this datasets’ set called “Indicadores Básicos del Desempeño Ambiental – Atmósfera – Cambio climático”. Inside this there is the dataset in CSV called “Variación en temperatura global”. It covers data since 1880!

    In Spain there is AEMET (Agencia Estatal Metereológica? with temperature datasets in CSV, but you need to browse inside “Catálogo. Plan RISP” to find what you need.

  18. Ed,

    I think you are scaling all temperature (anomalies) for each example to the full colour scale.

    It’s OK if you do that, but then it does mean you can’t compare one example against another. That should be made clearer.


  19. What platform were these graphed in? If there is code available, would you consider sharing it so that people can apply it to their own data sets of interest?

    1. Hi
      Is Germany also available in really high resolution or vector? I would like to print that out to use it as art and as a warning to all of us, that this is a dangerous trend.
      Let’s keep all aware of that dangerous clima trend…

  20. Erstklassiges und anschauliches Diagramm. Die Farben spiegeln sehr schön wieder, wie sehr der menschliche Einfluss die Evolution komprimiert.

  21. Hi Ed, how large are the Warming Stripes files? I’d like to print the world data file, frame it and put it up somewhere at home. Thanks, Matias

    1. @Matias – as the images are all vertical stripes with no gradient in any single stripe, using an image editor to convert them from raster (pixel/dot-based image) to vector (shape-based image) will result in an intermediary file, likely SVG format, that you can stretch to suitable print dimensions before converting back to a raster format. There are online editors that will provide this service for free. Cheers!

  22. I would like to see these datasets redone with the “Human Comfort Zone” (15°C/59°F – 25°C/77°F) as the white area (centered on 20°C) and then shifting to red & blue as the numbers exit this zone. This would allow all the graphs to be on the same visual scale for comparison. I know some areas are more “used to” more extreme temperatures but the HCZ is said to represent the range that reflects the average person’s healthiest range worldwide.

  23. I’m sure when you use Arctic stations, the right half would even more red than in Toronto and the right end very dark red. In the most crucial ecosystem for human survivability.

  24. Hello Ed, I was wondering if these are under a Creative Commons License or something else? On what terms (if at all) can I use them for a presentation/poster? Have a great day!

  25. Thanks for such a great graphic! I will use the one for Toronto when teaching. I would like it more if the link to the data is not broken, though…

  26. Hi Ed,
    great work! Are the graphics free for use under a Creative Commons License or eventually public domain? I’d like to share them on our blog and in our client magazine (https://www.mahlwerck.de) because we went to a clima neutral production (as a first step). Thaks a lot!

  27. Dear Ed,
    with great interest and admiration, I have followed your publication of the warming stripes. I would like to hang the picture for Germany as a large-scale expression in my office as art and at the same time warning everyone that this is a dangerous trend. Could you send me a high resolution file via Mail: bjoernruesing@gmail.com
    Thank you in advance and best regards from Germany

  28. At first glance very impressive graphics. But….
    Are historical readings 100% credible?
    What do we know about measuring principles and methods decades and centuries ago?
    What do we know about measurement accuracy, calibration and uncertainties?
    How would the graphics look like if historical readings would be corrected in an appropriate way?

  29. Hello Ed,

    Can I get the images also for my computer, tablets and phone (for the background). It is a stark reminder to do every day the right thing to stabilize the climate. And to talk with people about it, if necessary. It is visible this way and a topic for a conversation.



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