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We Could Brighten Clouds to Cool the Earth

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11–20 of 165 posts

Re: We Could Brighten Clouds to Cool the Earth

#11

Wouldn’t that reduce the available sunlight for photosynthesis? The problem is that we’re trapping more heat per photon. Reducing the amount of photosynthesis might reduce the carbon fixation by plants. Not sure if that’d be a good idea.

Photosynthesis is largely limited by water availability. Plants only uptake CO2 when they can open stomata, which is when they won’t dry out.

Re: We Could Brighten Clouds to Cool the Earth

#12

Everything but taking care of the cause? Pollution. Deforestation. Etc. Here’s a good start: https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss...

Taking care of all of the causes is not enough to fix the problem of climate change. If we hit net zero today, it would still continue to warm for decades, which means more deforestation and desertification through fires. Your proposal is far too conservative to avert disaster.

Re: We Could Brighten Clouds to Cool the Earth

#13
post #12

Everything but taking care of the cause? Pollution. Deforestation. Etc. Here’s a good start: https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss...

Taking care of all of the causes is not enough to fix the problem of climate change. If we hit net zero today, it would still continue to warm for decades, which means more deforestation and desertification through fires. Your proposal is far too conservative to avert disaster.

Amd more to the point, it has already been made quite obvious we as a species don't have the will to tackle the cause, so we are left with quick fixes with side effects, or just trying to adapt. It doesn't really matter what the right course of action is (or was really) if no one will do it.

Re: We Could Brighten Clouds to Cool the Earth

#14
post #7

Wouldn’t that reduce the available sunlight for photosynthesis? The problem is that we’re trapping more heat per photon. Reducing the amount of photosynthesis might reduce the carbon fixation by plants. Not sure if that’d be a good idea.

Sounds like most of the brighter clouds generated would be over the ocean in this particular scenario, so shouldn’t affect plants too much.

> Sounds like most of the brighter clouds generated would be over the ocean in this particular scenario, so shouldn’t affect plants too much.

Phytoplankton rely on photosynthesis and are the food for a large fraction of marine life (either directly or indirectly).

Re: We Could Brighten Clouds to Cool the Earth

#15
once the global climate gets sufficiently inconvenient we will definitely figure out a way of regulating ocean albedo via microorganisms or micromachines or something similar. human ingenuity will find a way. yes it might be a bit messy for a while...

Re: We Could Brighten Clouds to Cool the Earth

#16
post #7

Wouldn’t that reduce the available sunlight for photosynthesis? The problem is that we’re trapping more heat per photon. Reducing the amount of photosynthesis might reduce the carbon fixation by plants. Not sure if that’d be a good idea.

Sounds like most of the brighter clouds generated would be over the ocean in this particular scenario, so shouldn’t affect plants too much.

Just plankton and algae and the largest ecosystem on the planet, right? There's always a gotcha, because nature is a chaotic, complex system that is mathematically impossible to account for all the consequences of exercising leverage.

Re: We Could Brighten Clouds to Cool the Earth

#17
post #15

once the global climate gets sufficiently inconvenient we will definitely figure out a way of regulating ocean albedo via microorganisms or micromachines or something similar. human ingenuity will find a way. yes it might be a bit messy for a while...

What could possibly go wrong...

Re: We Could Brighten Clouds to Cool the Earth

#19
post #12

Everything but taking care of the cause? Pollution. Deforestation. Etc. Here’s a good start: https://www.epa.gov/ghgemissions/global-greenhouse-gas-emiss...

Taking care of all of the causes is not enough to fix the problem of climate change. If we hit net zero today, it would still continue to warm for decades, which means more deforestation and desertification through fires. Your proposal is far too conservative to avert disaster.

Source? I think we would avert disaster if we got net zero today. We wouldn't avoid change and things would continue to warm as you say. But it wouldn't be the end of civilization, just very inconvenient. In the other hand if we don't stop making the problem worse we will eventually activate feedback loops that can't be stopped and that do end civilization, kill the majority of humans and other species, and make huge parts of the Earth uninhabitable by us.

Re: We Could Brighten Clouds to Cool the Earth

#20
post #2

I think I'm a relative optimist about global warming because there are a number of possible climate engineering interventions which seem fairly cheap and could plausibly buy us another decade or so. I can imagine a future where perhaps India or China decides to act on their own to this effect, risks be damned.

That's one of the main plot elements of The Ministry for the Future.
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