u/CorvidCorbeau

SS: As most of us know by now, the pollution we continue to emit every day contains materials that actually benefit us, such as reflective aerosols that reduce the amount of radiative forcing the Earth experiences.

Reducing the emissions of these beneficial pollutants will make the already dire global warming situation even worse, and this is yet another way through which we are shown that regardless of which direction we go, regarding emissions, no path remains that lets us get away with the last few centuries' damage and destruction without consequences.

The projected reduction in AMOC strength is significant and although the study says methane emission cuts could offset it, the natural methane emissions we will experience could potentially render this point moot.

SS: Scientists created an optimized model which describes how microbes produce methane in the global oceans, and their findings warn that the warming oceans will result in less mixing between the surface- and deep waters, creating a phosphate shortage close to the surface, which creates favorable conditions for methane-producing microbes.

Most of the methane produced through this process escapes to the atmosphere, as only ~2% is oxidized in time. Their simulation of future emissions shows that while this source of methane isn't that big (around 2Tg/year) it could almost double in the future under an aggressive global warming scenario.

SS: Related to collapse because well, we all know why. Arctic sea ice is not only decreasing in its extent but also its thickness, which makes it increasingly likely that even a moderate disturbance, such as a lighter heatwave or smaller arctic storms can result in record low ice coverage.

As we can see, we are trending towards the first ice free September in the arctic, maybe not this year, but way sooner than we'd like.