From "Storms of My Grandchildren" by James Hansen
The IPCC has known about the incredible magnitude of the aerosol cooling effect for nearly 20 years.

Amounts in Wm² are multiplied by 0.75 to calculate the cooling effect in °C (Hansen)

1.1 to 3.7 Wm² = 0.8°C to 2.7°C

https://www.ipcc.ch/site/assets/uploads/2018/03/TAR-05.pdf
Yet this large rapid warming which directly results from reduced burning of fossil fuels (especially coal) isn't brought to our attention by the IPCC in carbon budgeting or by the UN / UNFCCC when demanding from world governments greater ambition to cut emissions.
Hansen:

"It means that the little blip of extra warming that we got in the past five years is only a down payment on the penalty that young people will pay for our Faustian bargain."

A huge surge which is now impacting humanity's food & water supplies.

https://mailchi.mp/caa/global-warming-acceleration?e=3ac2bfcbd5
V. Ramanathan:

"These [global temperatures] could happen sooner with quicker shedding of air pollutants."

https://www.nature.com/articles/d41586-018-07586-5
"They ran their model for the years 1980 to 2005, both with and without the reduction in sulphur emissions seen in Europe since 1980. The results suggest the Arctic is 0.54C warmer because of those emissions cuts, while Europe is 0.13C warmer."
"Sulphur emissions in Europe peaked in the 1970s and have declined to around a quarter of that level as governments have tackled air pollution. This decline has meant a reduction of the aerosol cooling effect, the researchers say, magnifying Arctic warming by 0.5C since 1980."
"as the study is only based on one model, the actual amount of warming COULD BE QUITE A LOT MORE (!!) or less than 0.5C"
Please read important thread.

IPCC has known for many years, yet has not brought to our attention in carbon budgeting.
@GretaThunberg
@Luisamneubauer
@gailbradbrook
@GreenRupertRead @jembendell @XRebellionUK @ExtinctionR @SLunnon1 @ClareTotty @RogerHallamCS21 @money_rebellion
You can follow @MarkCranfield_.
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