MétéoMédia - Planter des #arbres : oui, mais non...
▻https://www.meteomedia.com/ca/nouvelles/article/planter-des-arbres-oui-mais-non
[...] en juillet dernier, des scientifiques ont publié les résultats d’une étude dans la revue #Science qui affirmait que planter des milliards d’arbres permettrait de capturer l’équivalent de 20 ans d’émissions de #CO2.
À peine quelques semaines plus tard, un regroupement d’une soixantaine de chercheurs publie, dans la même revue scientifique, une critique de la même étude. Selon eux, les calculs seraient inexacts [...]
Trying to Plant a Trillion Trees Won’t Solve Anything | WIRED
▻https://www.wired.com/story/trees-regenerative-agriculture-climate-change
The team forgot that 55 percent of all historically emitted carbon got absorbed by the oceans, not the land, and so underestimated the total amount of carbon by about one half. They overestimated carbon uptake by trees, and suggested putting trees where they’ve never been, or where they’d actually make the planet hotter (by darkening planetary albedo over icy, more reflective terrain). They didn’t take into account that the ecosystems where they wanted to plant trees already sequestered carbon. And so on. “We’re not talking about small errors here. We’re talking about a huge difference in the total amount of carbon you could sequester,” says Carla Staver, an ecologist at Yale University.
The global tree restoration potential
►https://science.sciencemag.org/content/365/6448/76
Comment on “The global tree restoration potential”
►https://science.sciencemag.org/node/733045.full
