In January this year when David Spratt took a look at whether tipping points had already been passed for critical climate systems he found that coral reefs were in death spiral. From reef ecology scientists:
“The time between recurrent events is increasingly too short to allow a full recovery of mature coral assemblages, which generally takes from 10 to 15 years for the fastest growing species and far longer for the full complement of life histories and morphologies of older assemblages.”
Mass bleaching occurred in 1998, 2002, 2016, 2017 and 2020. Continue reading Farewelling the Great Barrier Reef
As linked by zoot on the last CC, pathogens are emerging as the permafrost melts, some capable of becoming active after long periods of time, even millions of years. There has been one case of anthrax becoming active after being frozen in a dead reindeer for 75 years. Continue reading Climate clippings 206
It’s not quite done and dusted, but the scientists on the official working group have overwhelmingly declared that the new ‘epoch’ of the Anthropocene has begun in the geological time scale.
Years ago I recall a caller on talkback radio saying that in 50 million years time the only sign of humans will be a layer of toxic slime in the geological record. Stratigraphy is what we are talking about here, so it’s serious. Humans are leaving an imprint on the earth’s crust that will be there forever, or until the dying sun expands, and burns the planet to a crisp. Continue reading Behold the dawn of the Anthropocene
In Goodbye Holocene, hello Anthropocene? I outlined the process being undertaken to consider whether the Holocene should give way to the Anthropocene. Now a few articles have appeared making the case.
Sam Wong in New Scientist give seven reasons: Continue reading The case for the Anthropocene
It hasn’t happened yet, not officially. The final decision rests with an august scientific body called the International Commission on Stratigraphy, which has a 36-person Working Group on the Anthropocene. Now 24 scientists, including some from the Working Group, have produced a paper advocating for the Anthropocene to be recognised as having begun in the mid-20th century. Continue reading Goodbye Holocene, hello Anthropocene?
One of the most contested graphs in climate science has been the hockey stick. Inconveniently for gain-sayers later science has confirmed the shape of the thing as sites such as Skeptical Science and New Scientist confirm.
The hockey stick was confined to temperatures for the last 1000 years. Graphs of the whole Holocene era were rare, although they did exist, as the featured image above. Now a study by Marcott et al has used 73 proxies to study average global temperature for the whole Holocene period of the last 11,300 years. You can read about it at New Scientist, Mother Jones, Climate Progress here and here. Continue reading New bigger, better hockey stick