Thread by @ncdave4life

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 1/7」That's simply untrue, Gabriel. Ice core records indicate that reversals in CO2 concentration trend followed reversals in temperature trend by at least several hundred years over ONE particular period of time. But that's no longer the case, and it hasn't been for >100 years.

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 2/7」Earth only got ≈90 ppmv of CO2 level change over a complete glaciation/deglaciation cycle, accompanied by at least 5-6°C global temperature change.
In contrast, we've gotten a 140 ppmv CO2 increase since 1780, accompanied by a small fraction of that much temperature change.

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 3/7」I do not understand how anyone can think that adding something to the atmosphere does not increase then amount of it in the atmosphere. That's just silly.

1 ppmv CO2 = 7.8024 Gt CO2 = 2.12940 PgC

So adding 7.8 Gt CO2 to the air raises CO2 level by 1 ppmv.

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 4/7」Since we have good economic data for the production of coal, oil, natural gas and cement, we can calculate anthropogenic emissions to within less than ±10%. (It's about 11.11 PgC/year averaged over the 5-year period 2017 thru 2021, = 5.22 ppmv CO2/yr)
sealevel.info/carbon/

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 5/7」We also know the amount of CO2 in the air, and from that we can tell by how much the amount of CO2 in the air increases each year (an average of 5.03 PgC/year over the 5-year interval 2017-2022, = 2.36 ppmv CO2/year).
sealevel.info/co2.html

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 6/7」Those two pieces of information are sufficient for us to deduce that "Nature" (the net sum of all natural sources and sinks) is removing CO2 from the air, currently a little over half as fast as mankind is adding it.

@SchneidGabriel @cptndemocracy64 @davidcharlesuk1 @EcoSenseNow 7/7」Subtracting the 2 figures above yields 5.22 - 2.36 = 2.86 ppmv CO2 / year, REMOVED by natural processes.
Similarly, AR6 WG1 Table 5.1 estimates that from 2010-2019 Nature removed an avg of 5.9 PgC/year (= 2.77 ppmv CO2 / yr).

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