Gulf Stream and cold snap in Europe: measurements and studies!

[dedeleco]

Right now on A5, the history of the earth over 4 billion years, and it has seen much more without human CO2 fluctuations, than our tiny current fluctuation which bothers us !!!

[Christophe]

But yes dedeleco, there is no doubt that the Earth has already seen worse! The proof: https://www.econologie.com/forums/extinction ... 10297.html

But the debate is not there, the debate that bothers me is that it is our responsibility as "intelligent being" (= being able to adapt to its environment) in the future mass extinction of biodiversity looming on the horizon ...

If we do not avoid the biological or planetary catastrophe, then we will have to review the definition of (human) intelligence!

[Obamot]

The possibilities within the reach of man to become the craftsman of the perpetuation of life are not very numerous, it would be for example to colonize a planet or exoplanet of the solar system conducive to life (as we understand it sometimes). Make it habitable and send seeds and animals to create a biotope, but success is far from guaranteed ... Is there even a suitable place?

On Mars - however the most "favorable" planet - the "warmest" surface temperature, would be -3 ° C and the average temperature of -60 ° C !!! The attraction would not be enough to maintain an atmosphere ... it's already badly crossed

Another formula would undoubtedly be to create sorts of “underground cities” inside certain mountains and completely autonomous from the outside world (thanks to the energy of geothermal energy and the presence of groundwater to provide water). Because at least we would be sure of one thing: that after a cataclysm, if indeed we can survive ... there would already be all the right conditions there for "it starts again" ...
But we would have to assess the number of months (years?) That it would be necessary to "hold" underground ...

But man still thinks too much about beating his face instead of thinking about the survival of living species ...

[oiseautempete]

On Mars - however the most "favorable" planet - the "warmest" surface temperature, would be -3 ° C and the average temperature of -60 ° C !!! The attraction would not be enough to maintain an atmosphere ... it's already badly crossed

...

Inaccurate for t °: in summer at the Martian equator it can rise to over + 27 ° C ... while average t ° is -53 ° C (we reach -90 ° C in Antarctica in winter, and almost as low in some Russian northern regions)

[sen-no-sen]

"The praise of the flight" ... Martian is only a phony hypothesis of a scientist in search of eccentric theories.
All possibilities of colonization of planets is impossible in the short term and is an aberration.
We must act here and now, even if the blue planet is ransacked, it will always remain a paradise with respect to its Martian sister.

[Christophe]

+1 with sen-no-sen but man progresses and TV was also science fiction not even 100 years ago ... if we don't "mess around" too much, there is a good chance that we manages to colonize other planets ... one day. Do not forget that humanity is still very young compared to the age of the universe!

We come back to the fermi paradox that we talked about in this interesting subject: https://www.econologie.com/forums/echelle-de ... t8166.html

But nature can also mess around and there may be another element to take into account: the Icelandic volcano eruption in spring 2010

[Obamot]

Modern world for modern world .... as it is necessary to start with something, I propose to take everyone speed and open two bank branches (ATMs that print the tickets on the spot ... not push .. .) one on Mars and the other on the Moon, like that the ricans and the financial circles will have it in the year .._ oxis.

In reality, the sustainability of life is only valid if it is "spontaneous" and not "assisted". Otherwise we call it a laboratory ...

Oiseautempete: I have not been verified, but something tells me that there can be sandstorms which can last several months, suddenly the temperature becomes almost instantly negative, which means that your 27 ° C is not guaranteed. Result of the races, I do not believe that it is viable, neither without a certain climatic stability, nor without atmosphere ...

[Christophe]

Reversal of Atlantic ocean currents, a possible consequence of climate change


The southern Atlantic circulation is considered to be one of the major components of the climate system. In the past, these currents, the best known of which is the Gulf Stream, have been very sensitive to changes in salinity. However, with global warming and the melting of polar glasses, such a change could happen again.

The climate change experienced by the Earth 20.000 years ago during the Ice Age has resulted in the reversal of the Atlantic ocean currents. To better understand the phenomenon and to improve the forecasting capacity of such an upheaval, an international team of researchers has modeled and simulated these phenomena. The results of this study carried out by scientists from the universities of Seville, Oxford and Cardiff, and conducted by Rainer Zahn and Pere Masqué of the Institute of Environmental Science and Technology (Icta) and the Department of Physics of the University Autonomous of Barcelona were published in the journal Nature.

The investigation starts from the premise that warm ocean currents carry enormous amounts of energy from the tropics to the polar region of the North Atlantic and thus influence regional climate models. Once in the north, the currents cool, its waters "sink" and transfer with them to the abyss, carbon from the atmosphere.

Research has focused on the distribution in the Atlantic of certain isotopes generated from the natural decay of uranium in seawater, and which are dispersed in the Atlantic by ocean currents. By analyzing the distribution of radioactive isotopes, the researchers demonstrated that the ocean circulation was very different in the past, that there were periods of reversal of the circulation regime of the deep waters of the Atlantic basin when the climate changed. is cooling in the north and the density balance has been altered.

source:
- Europa Press, article of November 4, 2010
- Nature 468, 84-88 (4 November 2010) | doi: 10.1038 / nature09508; Received April 14, 2010; Accepted August 26, 2010; Published online 3 November 2010, Reversed flow of Atlantic deep water during the Last Glacial Maximum - César Negre, Rainer Zahn, Alexander L. Thomas, Pere Masqué, Gideon M. Henderson Gema Martinez-Méndez, Ian R. Hall & José L. Mas - http://www.nature.com/nature/journal/v4 ... 09508.html

Source: http://www.bulletins-electroniques.com/ ... /65371.htm

[Obamot]

You want to spoil us on New Years, right?

[FPLM]

So the role of the Gulf Stream would be a priori limited ... unless it influences, as presumed above, too, on the polar winds.

Definitely, this Gulf Stream is too strong, it even cools Australia

http://www.20min.ch/ro/news/monde/story/20484549

The gulf stream is only a portion of the thermohaline circuit and all the circuits that compose it are linked together. Therefore, nothing prevents us from believing that the slowdown of the gulf stream at its node is the only disturbance in the circuit. Besides, there is a similar node in the northeast of Australia ...
In addition, global warming being global, its effects are felt everywhere on the planet at the same time whether it is via the disturbances in thermohaline circulation or not.

cf .: http://reflexions.ulg.ac.be/cms/c_23593/les-courants-profonds-cherfs-d-orchestre-des-abysses

PS: maybe we will be able to terraform an exoplanet in the near future, still we have to be able to do it in time and today it's still science fiction, but above all what good is it to establish life on an inert planet if we are not able to preserve it on a viable planet.