The Earth in 200 Millions of Years?

[Christophe]

That's what I said above ... the oceans are the carbon sink (so by deduction, the generator of O2 ...) the most important of the planet ...

[izentrop]

What are the 2 bottom indicators in "orange"? Irradiation on the left and on the right "O atm" but which units?

More precisely http://www.clubdesargonautes.org/histoi ... p4.php#VI1

That's what I said above ... the oceans are the carbon sink (so by deduction, the generator of O2 ...) the most important of the planet ...

It's more complicated than that http://www.clubdesargonautes.org/histoi ... p4.php#III

[Christophe]

What are the 2 bottom indicators in "orange"? Irradiation on the left and on the right "O atm" but which units?

More precisely http://www.clubdesargonautes.org/histoi ... p4.php#VI1

Yes thanks but sorry, it's not clear at all ...

It is the recent period of the last million years that has particularly interested continental paleoclimatologists and paleoceanographers to explain the alternation of glacial and interglacial periods. The most remarkable result, mentioned above, is to be attributed to an American trio, Hay, Imbry and Shackleton, who in 1976 presented the analysis of two cores of the Indian Ocean, covering the whole of the last ice cycle, in which they had measured a number of different climate-related parameters, including changes in the ¹⁸O/¹⁶O in foraminifers, carbonate levels that reflected the abundance of calcareous shell organisms, and variations in the foraminiferal populations themselves, some with known affinities for specific temperature ranges. The evolution of these parameters was consistent in accordance with the astronomical theory of Milankovitch, unfortunately deceased for twenty years.

To validate it definitively, however, it remained to be verified that astronomical theory explained all the climatic oscillations of the quaternary. A core covering almost six million years and thus the entire Quaternary (1024 000 to one million years) as well as the transition to earlier periods when the northern hemisphere began to glaciate, was carried out in a stable region of the equatorial Pacific Ocean. The isotopic analysis allowed the team of Nicolas Shakleton to reconstruct the variations of the continental ice volume over the last six million years. Several climatic regimes were highlighted showing advances and retreats of the Antarctic and Arctic glaciers. The most remarkable result was to show that from the moment when the ice sheet settled at the North Pole, the oscillations increased in amplitude to reach, about 1024 000 years ago, the regime of the climatic alternations which knew humanity with oscillations of amplitudes close to 15 ° C and according to periodicities consistent with the calculations of Milankovitch whose theory was thus definitively validated.

6 millions of years for a carrot ... and next we have a graph that drills to more than 3000m for 400 000 years?

[izentrop]

6 millions of years for a carrot ... and next we have a graph that drills to more than 3000m for 400 000 years?

From what I understood, the first 3 curves of Vostok carrots http://www.clubdesargonautes.org/histoi ... ap8.php#23 come from air bubbles trapped in the ice. It was possible to deduce precisely the contents of CO2 CH4 and temperature.

The 2 curves from below come from the isotopic analysis of oxygen and carbon in foraminifera shells http://svtmarcq.over-blog.com/article-f ... 20187.html allowing to deduce curves of temperature and the level of the seas.
As these are sediment cores, we can go much further back in time, but with a little less precision.

[Christophe]

Still not very clear all this ...

[izentrop]

A carrot covering almost six million years and therefore the entire quaternary (1024 000 to a million years)

That's what you're talking about? Indeed, it is not clear http://www.leparisien.fr/espace-premium ... 253817.php ... a big shell maybe?

[Christophe]

Yes that's it ... and the () does not mean anything either ...

1024 000 to a million years

??

[izentrop]

I left a message to the Argonauts, we'll see?

[izentrop]

The response of the Argonauts:

Thank you for having detected a shell in chapter 4 of our book: "Climate change - History and issues" and in its paragraph beginning with: "A carrot covering almost six million years and therefore the entire quaternary (1024 000 to a million years) .... "It was necessary to read: (900 000 to a million years) .... This error will be corrected.
thanks again
cordially

[sen-no-sen]

To worry about the earth in 200 millions of years is certainly very interesting, especially in terms of geology, but for the rest it is only hyper-speculation.
It would be much more judicious to ask the question of the earth in a century, knowing that the nineteenth centuries should profoundly determine the others.


La techno-sphere.
A hyper-technological world or a return to the stone age