@Zythryn #36 mentioned Amazon as a tipping point. It has been a center of related ecological research since Salati et al 1979 and Nobre et al 1991. Readers are forgiven for not keeping track, but it has also been a center for large research investments, innovations and scientific training. Result is that more is known about tropical-forest functions from there than anywhere else. Possibly more than any-forest functions anywhere. Even so, its future is still uncertain - plants and the systems they drive can still surprise observers. Slivers of new knowledge from there get processed by click-driven media in many ways, and not all can I commend to your attention. It does seem well to not go crazy with forest removal for soy-and-corn in the lowlands, and to not go crazy with petroleum and gold 'development' in the highlands. It is large and it matters for all. But media churning Amazon does not teach much at all. == Permafrost soils may present another tipper, and media churn it similarly. However they have drawn less inve$tment for knowledge etc., even with a much longer carbon lever. Not happy about that.
This may not be as well understood as ice loss or such. I do believe this is going to be one of those changes that most people will be shocked by when it happens. More details on the paper here: https://www.nature.com/articles/s41467-020-18728-7
Canada forest fire burn area to date is 102% of average year total Canadian Wildland Fire Information System | National Wildland Fire Situation Report Canadian Wildland Fire Information System | Canadian National Fire Database (CNFDB) US forest fire burn area to date is 40% of average year total https://www.nifc.gov/fire-information/nfn Much higher than early July previous post on this. Again, fire seasons have months to go.
Comparison, same time, about 1/2 hour back, Coquitlam, BC, and Los Angeles, CA. Note the Coquitlam air quality; they’re not kidding. I stepped outside around 3pm, it’s not just eternal sunset light, nor campfire smoke; it smelled BAD.