Un pas de plus vers la reconnaissance de l’#anthropocène comme nouvelle ère géologique avec ce papier dans Science de l’Anthropocene Working Group.
The Anthropocene is functionally and stratigraphically distinct from the Holocene
▻http://www.sciencemag.org/content/351/6269/aad2622.full
The appearance of manufactured materials in sediments, including aluminum, plastics, and concrete, coincides with global spikes in fallout radionuclides and particulates from fossil fuel combustion. Carbon, nitrogen, and phosphorus cycles have been substantially modified over the past century. Rates of sea-level rise and the extent of human perturbation of the climate system exceed Late Holocene changes. Biotic changes include species invasions worldwide and accelerating rates of extinction. These combined signals render the Anthropocene stratigraphically distinct from the Holocene and earlier epochs.
’Case is made’ for Anthropogenic Epoch
▻http://www.bbc.com/news/science-environment-35259194
“Within the Working Group - and we have 37 members - I think the majority of them now agree that we are living in an interval we should call the Anthropocene. There’s still some discussion as to whether it should be a formal or informal unit, but we’d like to have a specific definition. And a majority of the group are moving towards the mid-20th Century for the start of this new epoch.”
[...]
Ultimately it will be down to the International Commission on Stratigraphy to accept - or not - the “Anthropocene Epoch” as an additional unit in the official time scheme used to describe the planet’s 4.6 billion years of history.