Analysis of information sources in references of the Wikipedia article "Океанічні безкисневі події" in Ukrainian language version.
[At plus] Six degrees [i.e rise of 6 degrees Celsius] * At the end of the Permian period, 251 million years ago, up to 95% of species became extinct as a result of a super-greenhouse event, resulting in a temperature rise of six degrees, perhaps because of an even bigger methane belch that happened 200 million years later in the Eocene and also: *Five degrees of warming occurred during the Paleocene-Eocene Thermal Maximum, 55 million years ago: during that event, breadfruit trees grew on the coast of Greenland, while the Arctic Ocean saw water temperatures of 20C within 200km of the North Pole itself. There was no ice at either pole; forests were probably growing in central Antarctica. * The Eocene greenhouse event was probably caused by methane hydrates (an ice-like combination of methane and water) bursting into the atmosphere from the seabed in an immense “ocean burp”, sparking a surge in global temperatures. Today vast amounts of these same methane hydrates still sit on subsea continental shelves. * The early Eocene greenhouse took at least 10,000 years to come about. Today we could accomplish the same feat in less than a century. (emphasis, links added)
The central external trigger for euxinia is proposed to be enhanced volcanism (release of volcanic CO2), although other external forcings of the climate system could be imagined (changing solar luminosity, changes in continental configuration affecting ocean circulation and the stability of ice sheets.
The central external trigger for euxinia is proposed to be enhanced volcanism (release of volcanic CO2), although other external forcings of the climate system could be imagined (changing solar luminosity, changes in continental configuration affecting ocean circulation and the stability of ice sheets.
The central external trigger for euxinia is proposed to be enhanced volcanism (release of volcanic CO2), although other external forcings of the climate system could be imagined (changing solar luminosity, changes in continental configuration affecting ocean circulation and the stability of ice sheets.
[At plus] Six degrees [i.e rise of 6 degrees Celsius] * At the end of the Permian period, 251 million years ago, up to 95% of species became extinct as a result of a super-greenhouse event, resulting in a temperature rise of six degrees, perhaps because of an even bigger methane belch that happened 200 million years later in the Eocene and also: *Five degrees of warming occurred during the Paleocene-Eocene Thermal Maximum, 55 million years ago: during that event, breadfruit trees grew on the coast of Greenland, while the Arctic Ocean saw water temperatures of 20C within 200km of the North Pole itself. There was no ice at either pole; forests were probably growing in central Antarctica. * The Eocene greenhouse event was probably caused by methane hydrates (an ice-like combination of methane and water) bursting into the atmosphere from the seabed in an immense “ocean burp”, sparking a surge in global temperatures. Today vast amounts of these same methane hydrates still sit on subsea continental shelves. * The early Eocene greenhouse took at least 10,000 years to come about. Today we could accomplish the same feat in less than a century. (emphasis, links added)
