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[Watts Up With That?] Happer on The Truth About Greenhouse Gases | Watts Up With That?: “Sorry run that by me again, as I recall 50 million years ago coincides with the peak of the PETM (Paleocene-Eocene Thermal Maximum) (55-45 million years ago) when Co2 levels did indeed spike to ~2000ppm, with the very affects being talked about linked to the current AGW problem a global temp 6°C (11°F) warmer than today and ocean acidification event that is thought to have caused 35-50% rates of extinction in the deep ocean life, corals and plankton, and in spite of the fact there were no icecaps to melt sea level rise due to thermal expansion. The difference today is we have polar cap that can and are melting causing a more pronounced sea level rise, and rising ocean acidification is already being measured in oceans around the world.

[Consortium for Ocean Leadership] Ocean Leadership - Natural Global Warming Period Illuminated by ...: The existence of the remains of cyst-forming dinoflagellate plankton Apectodinium augustum and a change in the isotope content that is characteristic of the PETM suggest that the PETM affected lower ocean life predominately in the Spitsbergen by depleting the oxygen from lower levels of the ocean while the IODP Site 302-4A indicates oxygen depletion from the upper levels of the ocean.

[Your Hockey Site] All posts tagged 'global warming': Climate appetite scientist Steven Davis of a Carnegie Institution’s Department of Global Energy as well as colleagues acted a hypothetical: What would occur if a sum universe unexpected stopped office building brand brand brand brand brand brand brand new CO dioxide emitters, from spark plants to cars, as well as let a existent ones die of march of aged age? Will a CO emitters of now pull us over a limit, no have a difference what you do next?.But a tiny scientists consternation if we’re already there

[Watts Up With That?] Ancient natural global warming | Watts Up With That?: By carefully comparing their results with those from IODP Site 302-4A to the north, they found evidence for regional differences in the environmental manifestations of the PETM in high northern latitudes. For example, the evidence from the IODP site suggests that the sunlit surface layer of the ocean was often depleted of oxygen, the results from Spitsbergen suggest that oxygen depletion was largely restricted to the bottom waters and sediments.  In addition, they found that pollen from flowering plants was scarce, unlike at the IODP site, suggesting that conditions around the Spitsbergen Central Basin may not have been conducive to the growth of flowering plants during the PETM.

[Consortium for Ocean Leadership] Ocean Leadership - Could Human CO2 Emissions Cause Another PETM?: During the Cenozoic (the last 65 million years) the global climate has cooled substantially, up to a main cooling step at the Eocene-Oligocene transition (~34 mya), which included the development of the first glaciation at a continental scale in Antarctica. Another main cooling step occurred in middle Miocene (14 mya) and was a significant step in the development of the Antarctic continental glaciation.

[Climate Progress] NSIDC: Arctic is on thin ice — literally — and that means the ...: One permafrost model, presented in late 2005, indicated that near-surface Arctic permafrost will completely degrade during the 21st century. ...

[From the NonProfit Industrial Complex with Love] The Real Weapons of Mass Destruction: Methane, Propaganda & the ...: [21] Additional anthropogenic GHG forcing and methane emission threaten conditions approaching those of the Paleocene-Eocene Thermal Maximum (PETM) 56 Ma, when the eruption of some 1500 GtC (Sluijis et al, 2007), inferred from low d13C values (-2-3% @ 13°C), this resulted in global warming of approximately 6°C, development of subtropical conditions in the Arctic circle (sea temperatures 18-23°C ”” Sluijis et al, 2007), ocean acidification and mass extinction of 30-35% of benthic plankton. The recent history of the atmosphere, and the presence of thousands of GtC in metastable methane hydrates, clathrates and permafrost, suggests a CO2 trajectory toward 550 or 650 ppm, as projected by Anderson and Bowes (2008), which may lead toward mass extinction of species and breakdown of global civilization (Stipp, 2004).

[Skeptical Science] CO2 has been higher in the past: And even the end-Cretaceous extinction (that did for the dinosaurs) seems to have had at least a significant component from massive flood basalt events (that resulted in the Deccan Traps in what is now India). In fact there is increasing evidence that the impact that resulted in the Chicxulub crater in the Yucatan post-dates the onset of the extinction by several 100,000's of years, and the extinction is associated with global warming (including a sudden contribution from the impact into limestone-rich deposits that vapourized massive amounts of carbonate (limestone) back into CO2):

[Consortium for Ocean Leadership] Ocean Leadership - Shark Teeth Provide Key To North Sea's Climatic ...: The Palaeogene was a time when greenhouse conditions prevailed and mammals began to diversify in the wake of the mass extinction event that saw the demise of the dinosaurs, along with 65% of all species. It also featured a brief episode of global warming known as the Palaeocene-Eocene thermal maximum (PETM), a rapid climatic disturbance that saw temperatures rise by around six degrees in a 20,000 year period.

[Watts Up With That?] Coloring the Models: Climate Change through Color Change | Watts ...: Yet the Register chose to continously enlighten us with his views on climate change without criticism, Is he perhaps having some connection to IT professional John Atkinson, who was allowed to post a similarly incoherent article on the Register? Is it just a coincidence that someone using the moniker “John A.”

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