, 4 tweets, 3 min read Read on Twitter
Even 1.5°C scenarios with "no or low overshoot" have CO₂ removal (negative emissions), & I suspect at a scale that many are uncomfortable with...

How many realise this? Do people equate "no overshoot" with "no negative CO₂ removal"?

#SR15 ipcc.ch/sr15/chapter/2…
The 9 scenarios in #SR15 classified as "no overshoot" hit zero around 2050 & go *net* negative to the tune of about 5-15GtCO₂ in 2100. The actual CO₂ removal *gross* negative emissions is much larger than that.

Data: data.ene.iiasa.ac.at/iamc-1.5c-expl…
This was one of the key messages from "The trouble with negative emissions" article with @KevinClimate. The actual CO₂ removal (light orange) is much larger than commonly perceived (black line), as scenarios are generally plotted as "net" emissions!

Bonus extra: I should add, that in #SR15, "overshoot" is how much a given temperature level is exceeded, which is different to whether it has a peak & decline. A scenario could reach 1.5°C (no overshoot), but then decline to 1.3°C in 2100 because of CO₂ removal. 4/3
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