Asteroid Not Dinosaur Killer Obvious On Temperature Graph?

I believe in the Big Obvious.

For example it is obvious that Representative Democracy is neither.

Here is another example of the Big Obvious: the temperature jump UP after the end of the Cretaceous, (roughly) 66 million years ago. Refined series concur: there was a significant cooling before the K-T (Cretaceous-Tertiary)… now the “Tertiary” is known for obscure reason (all species generated?), as the Paleogene.

With the dinosaurs disappeared huge marine reptiles such as the mosasaursichthyosaurs, and plesiosaurs, as well as all the gigantic flying reptiles known as pterosaurs. While some mammals, birds, small reptiles, fish, and amphibians survived, diversity among the remaining life-forms dropped precipitously. In total, this mass extinction seems to have claimed three quarters of known species on Earth.

If this is true, the mass extinction was not caused by impact

Indeed, notice the jump in temperatures at the K-Pal boundary: dinosaurs were mesotherms, temperature sensitive… They couldn’t take brutal cooling… Especially with highly endothermic (temperature producing) avian dinosaurs (birds) and mammals around. I have argued the exact extinction mechanism from competition in:

https://patriceayme.wordpress.com/2013/03/14/why-did-neanderthals-disappear/

Mathematics extinguished, mostly, Neanderthals and absolutely 3/4 of species at the K-Pal boundary (from competition with more competitive species)

As dinosaurs evolved in times when temperatures were higher, it made no sense to have strong body temperature control: a large mass was plenty enough. Especially if covered with feathers…

So what happened? The Deccan Traps could have caused nuclear winter style cooling interspaced with strong CO2 warming, while the CO2 poisoned the oceans. Having a celestial body come at that point was extremely unlikely bad luck, and may have been the straw which broke the dying camelback….

In any case the warming came too late..

 

3 Responses to “Asteroid Not Dinosaur Killer Obvious On Temperature Graph?”

  1. ianmillerblog Says:

    I would be a little skeptical about the ancient temperatures – the dinosaurs were not noted for their production of thermometers or, for that matter, good record keeping. I have seen another analysis that had Jurassic temperatures equivalent to where you have the Triassic maximum. Another problem is comparing like vs like. The further back you go, the harder it is to know exactly where the places were.

    Having said that, I agree the Deccan Traps were also critical. Amongst other things, they kept their effects for a lot longer. The asteroid impact would kill a lot, but it wouldn’t promote evolution because it would not last that long. What the Deccan Traps did would last long enough for the more evolutionarily mobile to adapt and grasp the changing food supplies.

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    • Patrice Ayme Says:

      I was talking last evening over dinner to my good friend Charles, a top tenured paleontologist extraordinaire over-reviewer at Science for these matters and others… He is pro-asteroid, but has a very open mind. All his colleagues are pro-asteroid, foaming at the mouth…

      I made fun of the latest asteroid twist, which is that the bolide hit a special place. It used to be a place full of CO2, now it’s full of sulfur…

      I don’t believe it, have to poison all the seas… CO2 from Deccan Traps will do it. It’s just a matter of time before they find life was totally completely over stressed just before impact… The coincidence is amazing, though… Proving not the multiverse, but certainly, gods, demons or Lucifer…

      I mentioned to him the temperature jump as something huge, clearly showing the asteroid didn’t make the temps jump. Massive CO2 would though… Could even change the climate for millions of years… (Once albedo is modified, stays so…)

      BTW, thanks for your essay of last week, I was busy, very, not pleasant, so didn’t look at your site. I am VERY intrigued by “weak experiments”. Don’t understand them very much. First I was enthusiastic when I learned about them, then got to shrug them off completely… Anyway, SQPR can leave with them. Comment coming on your site…

      That asteroid can’t possibly work… But one thing that could work would be a comet impact, BTW… For a number of reasons (multiple impacts and flash steaming)…

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    • Patrice Ayme Says:

      More than ten years ago, DECCAN TRAPS:
      https://patriceayme.wordpress.com/2009/11/21/trapped-by-super-traps/

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