Friday, November 03, 2023

Aerosols to the rescue?

[comment to ars technica https://arstechnica.com/science/2023/11/former-head-of-nasas-climate-group-issues-dire-warning-on-warming/ ]

We're now getting the kind of disaster that wipes out entire cities as a time. Just a few right now, but that's clearly going to accelerate, and not even be in places already acknowledged as vulnerable (that is, poor people and the global south). Temperatures that stay high evaporate more water, and there's going to be more water available anyway. 

We're used to storms destroying places, but having time to rebuild, sometimes even rebuild with the future in mind (e.g., not rebuilding in a flood plain), but whole new secondary effects are now getting enabled with the temperature rise: things like permafrost melting, fire tornados, and soon, large areas with wet bulb temperatures for extended periods of time that humans can't live in, any more than they can live under water. 

Oh, and it's not just humans, navel gazers, it's all the other plants and animals. 

Photosynthesis becomes less efficient at high temperatures, making the only at scale natural carbon sink less reliable. Aerosols may be increasing albedo, or lowering it, depending on the aerosol. Apparently, there's a lot of microplastic already in the air. Also: any geo-engineering without pumping up the carbon volume is kind of a pipe dream at this point.

Why anyone thinks any semblance of resilience and adaptability will be possible after around 2030 is a mystery to me. P.S.: hot wars are just about the most carboniferous activity people can participate in.