3 ms·

I don't want to sound fatalistic but it's difficult to see how we can reset the 4 big feedback loops in any reasonable amount of time: Ice-albedo feedback - ht

I don't want to sound fatalistic but it's difficult to see how we can reset the 4 big feedback loops in any reasonable amount of time: Ice-albedo feedback - https://en.wikipedia.org/wiki/Ice%E2%80%93albedo_feedback https://en.wikipedia.org/wiki/Ice%E2%80%93albedo_feedback Permafrost thaw feedback - https://www.thearcticinstitute.org/global-carbon-budget-permafrost-feedback-loops-arctic/ https://www.thearcticinstitute.org/global-carbon-budget-perm... Forestfire\Drought feedback - https://weatherology.com/trending/articles/Drought-Feedback-Loop-Wildfires.html https://weatherology.com/trending/articles/Drought-Feedback-... Jetstream Disruption feedback - https://www.climate.gov/news-features/understanding-climate/understanding-arctic-polar-vortex https://www.climate.gov/news-features/understanding-climate/... It'll be like stopping an avalanche with a shovel. Any control theory guys out there with suggestions?

toomuchtodo 5y ago
Sulfur dioxide aerosol injection in the stratosphere until carbon capture and decarbonization can catch up. We desperately need an energy inexpensive way to sequester atmospheric carbon underground in stable (mineral) form. Hopefully we’ll see progress from Climeworks or similar concerns in this space. https://iopscience.iop.org/article/10.1088/1748-9326/aae98d/meta https://iopscience.iop.org/article/10.1088/1748-9326/aae98d/...
- funkykong 5y ago
  I wonder if Venusians tried the same thing which lead to the concentrations of SO2 we see in Venus' atmosphere.
  - DrAwdeOccarim 5y ago
    Someone should make this a movie.
    - deleted 5y ago
      [deleted]
- hutzlibu 5y ago
  As long as so many coal plants are happily smoking and even more are about to be build, I think the first priority is to shut them down and replace those, instead of experimenting with the already quite instable global climate, by injecting more chemicals. And after we stop emmitting CO2, we can focus on artificial decarbonization. But I would rather invest in proven technology, like reforesting first.
- taneq 5y ago
  I read something recently about seeding beaches with crushed limestone which accelerates CO2 absorption through weathering or something.
- pabs3 5y ago
  I think that was what the movie Snowpiercer was about. It ended badly before the start of the movie, with an ice age.
taneq 5y ago
> Any control theory guys out there with suggestions? Nothing small and cheap. We've been applying a massive forcing effect by adding billions of tons of CO2 per year to the atmosphere over decades. It's going to require a commensurate amount of effort, at the very least, to swing the needle back in the other direction. Our best bet might be something crazy like using nukes to set off volcanoes to generate an ongoing low level 'nuclear winter' type effect. We'd have to be careful to pick the right volcanoes, though, to minimize the CO2 emitted by said volcanoes.
lr1970 5y ago
In the field of active climate engineering one can try dispersing aluminum [0] or/and (synthetic) diamond micro-particles [1] in the stratosphere to reflect some of the Sun's light back into space. Especially useful because the effect is temporary and self-healing. An accidental "ice age" will resolve on its own in few months after one stops replenishing the stratosphere with the particles. [0] https://acp.copernicus.org/preprints/15/11799/2015/acpd-15-11799-2015-print.pdf https://acp.copernicus.org/preprints/15/11799/2015/acpd-15-1... [1] https://www.nature.com/articles/nature.2015.18634 https://www.nature.com/articles/nature.2015.18634

toomuchtodo 5y ago

Sulfur dioxide aerosol injection in the stratosphere until carbon capture and decarbonization can catch up. We desperately need an energy inexpensive way to sequester atmospheric carbon underground in stable (mineral) form. Hopefully we’ll see progress from Climeworks or similar concerns in this space. https://iopscience.iop.org/article/10.1088/1748-9326/aae98d/meta https://iopscience.iop.org/article/10.1088/1748-9326/aae98d/...

funkykong 5y ago
I wonder if Venusians tried the same thing which lead to the concentrations of SO2 we see in Venus' atmosphere.
- DrAwdeOccarim 5y ago
  Someone should make this a movie.
  - deleted 5y ago
    [deleted]
hutzlibu 5y ago
As long as so many coal plants are happily smoking and even more are about to be build, I think the first priority is to shut them down and replace those, instead of experimenting with the already quite instable global climate, by injecting more chemicals. And after we stop emmitting CO2, we can focus on artificial decarbonization. But I would rather invest in proven technology, like reforesting first.
taneq 5y ago
I read something recently about seeding beaches with crushed limestone which accelerates CO2 absorption through weathering or something.
pabs3 5y ago
I think that was what the movie Snowpiercer was about. It ended badly before the start of the movie, with an ice age.

taneq 5y ago

> Any control theory guys out there with suggestions? Nothing small and cheap. We've been applying a massive forcing effect by adding billions of tons of CO2 per year to the atmosphere over decades. It's going to require a commensurate amount of effort, at the very least, to swing the needle back in the other direction. Our best bet might be something crazy like using nukes to set off volcanoes to generate an ongoing low level 'nuclear winter' type effect. We'd have to be careful to pick the right volcanoes, though, to minimize the CO2 emitted by said volcanoes.

lr1970 5y ago

In the field of active climate engineering one can try dispersing aluminum [0] or/and (synthetic) diamond micro-particles [1] in the stratosphere to reflect some of the Sun's light back into space. Especially useful because the effect is temporary and self-healing. An accidental "ice age" will resolve on its own in few months after one stops replenishing the stratosphere with the particles. [0] https://acp.copernicus.org/preprints/15/11799/2015/acpd-15-11799-2015-print.pdf https://acp.copernicus.org/preprints/15/11799/2015/acpd-15-1... [1] https://www.nature.com/articles/nature.2015.18634 https://www.nature.com/articles/nature.2015.18634