A large consensus claims CO2 will cause the Earth to warm, at some climate sensitivity. A smaller consensus also claims positive accelerations will increase this effect, namely: polar amplification, humidity, and methane release.
Less often spoken of are the negative accelerations. I have collected here a few hypotheses.
This first group is for housekeeping.thermodynamics
- logarithmic property of radiative transfer
- increased absorption rate of CO2 into oceans (greater percentage, extra heat, extra air pressure due to CO2 being heaver than oxygen)
- thermal expansion of troposphere 1
- UV breakdown in the stratosphere of C02 at a greater rate
Now the true negative accelerations:
- more plants because of more CO2, humidity, and warmth
- CO2-fixing coccolithophores
- methane-fixing bugs in the tiaga
- increased CLAW production (by pelagibacterales) of dimethyl sulfide on ocean surface (creating more cloud albedo)
- extra CLAW in the Arctic (directly working opposite of polar amplification)
- tropical cyclones (causing more water to fall onto plants than usual)
- ocean rise increasing volume of water exchanged with the sill-protected Arctic (creating more open water, increasing lake-effect NH snowfall, slowing NH glacier melt (Ewing, Donn, 1956) leading to deceleration of ice albedo loss)
- heavier atmosphere will lead to enhanced rock weathering when rain hits the rock (some chemical reaction I do not understand).
- or is this counteracted because CO2 is heaver than O which it displaces?