Thread by @KrVaSt

It doesn't matter how long it has been that earth saw these kind of CO2 concentrations in her atmosphere.

115k, 3M, 20M, 34M, 56M or 200M years ago?

More important is the rate of increase of CO2 in the atmosphere during the last few decades.
Biggest rate in about 420M years!

Because methane is getting the main contributor to global warming, it doesn't matter which GWP factors (100-year factors, 20-year factors or 10-year factor) we use to calculate the total CO2 equivalent of the main GHG's (N2O, CH4 & CO2 itself).

CO2e (N2O+CH4+CO2):
100-yr GWP: 584 ppm (99+65+420)
20-yr GWP: 674 ppm (89+165+420)
10-yr GWP: 710 ppm (83+207+420)

Local CH4 concentrations are going up to 16.000 ppb or 16 ppm (methane bubbles in the Arctic Ocean).

This means anomalous local CO2 equivalents:
1063 ppm (100-year GWP factors)
1885 ppm (20-year GWP factors)
2231 ppm (10-year GWP factors)

shr.gs/cUrWCQU

Arctic stations are picking up CH4 concentrations even higher than 2040 ppb. This means extreme high concentrations in larger areas. CO2 concentrations are triggering CH4 concentrations to raise anomalously fast. The Arctic permafrost has touched & passed its tipping point.

We have never seen this before.

We destroyed partially our main negative feedback: the forests.
There have never been more GHG's in our atmosphere than today in about 115.000 years, decades, centuries, millennia, ...

In simple words: "We need to raise our ambitions!"

100 times higher than what we agreed in the #ParisAgreement

#negativeemissions best within 365 days (500% reduction)

@antonioguterres @PEspinosaC @UNFCCC @EU_Commission