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Earth’s Orbital Shifts May Have Triggered Ancient Global Warming
A new study combining astronomical and geologic data hints at an extraterrestrial cause for extreme climate change 56 million years ago.
Whatever was responsible for the surge of carbon dioxide that preceded the PETM, the event—and the rise in global temperatures that followed—are the best analogue in the rock record for current human-caused global warming. That does not mean orbital forcing is playing a role in anthropogenic climate change, Zeebe says. In fact, humans are releasing carbon into the atmosphere far faster than it occurred at the time of the PETM, meaning its impacts could be more severe. “Obviously, orbital configurations today are very different than they were 56 million years ago,” he says. “And in terms of future climate change, there’s very little expectation that orbital forcing will reduce or mitigate [it].”
And I'm the King of Siam.
A new study combining astronomical and geologic data hints at an extraterrestrial cause for extreme climate change 56 million years ago.
Whatever was responsible for the surge of carbon dioxide that preceded the PETM, the event—and the rise in global temperatures that followed—are the best analogue in the rock record for current human-caused global warming. That does not mean orbital forcing is playing a role in anthropogenic climate change, Zeebe says. In fact, humans are releasing carbon into the atmosphere far faster than it occurred at the time of the PETM, meaning its impacts could be more severe. “Obviously, orbital configurations today are very different than they were 56 million years ago,” he says. “And in terms of future climate change, there’s very little expectation that orbital forcing will reduce or mitigate [it].”
And I'm the King of Siam.