[pmayrgundter]

Good finds. Thanks!

Yeah, it's the comparison between DRE and Gas ejecta that got me bogged down before.

Having now given up, I asked ChatG4. It says "the mass ratio between DRE and gaseous emissions might be on the order of 20:1 to 100:1", no citations ofc.

So, just as a strawman and using your 10-40%, on the low end .01.1 = 0.001, high end .05.4 = 0.02. So .1%-2% of ejecta by mass is CO2 emissions. Hah :)

Using my orig figure for Toba of a billion gigatons of ejecta, of which roughly a million gigatons would be CO2. Correct math?

Human GHG emissions are ~50 Gt/year.

[dredmorbius]

DRE == dense rock equivalent:

<https://en.wikipedia.org/wiki/Dense-rock_equivalent>

[pmayrgundter]

Math glitch. It was a million gigatons DRE, so 1000 Gt CO2