Joeri Rogelj Profile picture
prof. climate science & policy | 1.5C/net zero/carbon budget/justice | @CEP_IC @Grantham_IC | lead author @IPCC_CH AR6 @UNEP #emissionsgap | member @esabcc_eu

Aug 18, 2021, 12 tweets

After the first bang of the @IPCC_CH AR6 report, it's time to look at my favorite part of the report:
visuals in the SPM.

It was a privilege to work with a team of #dataviz and information design experts @angelamorelli @tomhal99 @jordanharold on these visuals
(1/n)

The first visual shows us that human influence has warmed the climate at a rate unprecedented in at least 2000 years.

I really like how it contrasts the climate our societies were used to during their development with the evidence that we are responsible.
(2/n)

A nice animated version by @angelamorelli (3/n)

The second visual shows how observed warming is driven by emissions from human activities.

It shows that greenhouse gases alone would already have warmed the planet by 1.5°C, but air pollution is currently cooling it. Both need to be tackled.
(4/n)

Also here a nice animation by @angelamorelli (5/n)

Climate change is already affecting us our activities contribute to many observed changes in weather and climate extremes.
Each red hexagon represents a world region in which observed hot extremes have increased, with the number of dots representing our confidence.
(6/n)

This visual was actually too large to fully fit in a single tweet. Here is the same visual for heavy precipitation and droughts.

We see it's happening and we know it's us.
(7/n)

Combined again in a single visualisation (8/n)

The fourth visual shows scenarios that help @IPCC_CH describe the implications of our emission reduction choices.

They cover a full range from very high emissions that require a roll-back of climate policies to very low emissions that require deep cuts in the next decade. (9/n)

The final visual for today shows that every increment of warming matters for climate impacts.

That is true for temperatures. (10/n)

As well as for precipitation and soil moisture - important for the impact heatwaves have on society and crops.
(11/n)

Enough for today. Stay tuned for the second part of visual over the next days. (end)

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