Comment What happeneed to the Deccan traps? (Score 1) 38
https://geosciences.princeton....
Abstract: We test whether Hg in marine sediments over the last 550 m.y. of the Cretaceous is a reliable proxy linking Deccan Traps volcanic eruptions to late Maastrichtian global climate warming and the mass extinction at the Cretaceous-Paleogene boundary (KPB).
From what I have seen and read about this, it is quite possible that the traps were emitting unimaginable amounts of gasses for tens of thousands, possibly hundreds of thousands of years. In this video essay from Kurzgesagt (https://www.youtube.com/watch?v=pjoQdz0nxf4) it is suggested that the traps emitted the equivalent of tens of thousands of our civilizations (!!!) for great many years. Gases that swung the climate like mad: sulfur-based "coolers" and carbon-based "warmers". Plus the mercury, where our current emissions will not even register on the scale back then (and also why the greatest source of Hg in the air today is coal and oil burning - we are re-emitting the poison that the Earth spewed in the past).
In the last several years though, there seems to be a concerted effort to bury the contribution of the traps and put all of it on the asteroid again. Could it be because the traps show that the greatest danger is beneath our feet and has nothing to do with our civilization? Compare the apocalyptic claims of irreversible this and catastrophic that, which will surely happen next year, or at the latest by 2030 or at the very, very latest by 2050 with evidence that tens of thousands of civilizations worth of emissions, going on for a lot longer than our singular civilization has existed didn't result in irreversible climate change and wholesale destruction of life. In fact, adding the asteroid as the cherry on the cake, KPB extinction event is, as far as I remember, the mildest extinction of the big 5(?). Only 75% of everything living perished...
Kurzgesagt goes on mentioning that all the big extinction events were caused by volcanic activity.