Des chercheurs du Massachusetts Institute of Technology (MIT, États-Unis) proposent d’envoyer un radeau de bulles dans l’espace pour dévier une partie des rayons du Soleil et limiter — voire inverser — le réchauffement climatique. © MIT

Geoengineering is the category of technology that encompasses ideas aimed at intentionally altering our climate. With the aim of limiting the causes and consequences of global warming
According to experts from the IPCC, the Intergovernmental Panel on Climate Change, global warming of the planet will…” data-image=” b/ e3b72826bf_114784_global-warming-illustration.jpg” data-url=”” data-more=”Read more”>global warming. “What We Could Do…If We Continue To Do Nothing”joked David Keith, physicist at Harvard University (USA), on the occasion of a TedEx conference in 2007.

All types of technology fall into this category. The technologies of Capture and storage or recovery of carbon dioxide (CO2), for example. In its most recent report, the Intergovernmental Panel on Climate Change (IPCC) announces that we can no longer do without it. If we still hope to limit global warming to 1.5°C.

But geoengineering involves other technologies that are a bit more controversial. Because they aim to change our climate quickly and on a large scale, without always assuring the admissibility of the side effects. Like the technologies aiming somehow “Intervene at the source”to play with the solar radiation that the earth receives.

This is what a team of researchers out Massachusetts Institute of Technology (MIT, USA). The idea: send the bubbles into space to deflect part of the sun’s rays, the sun is the closest star to earth, from which it is about 150 million kilometers away. The Sun is 8.5 kParsecs from the center of the Milky Way. In the stellar classification, the Sun is a G2 type star.
The mass…” data-image=”” data-url=”https://news.” data-more=”Read more”>Sun that hit our planet. Because researchers estimate that deflecting just 1.8% of the sun’s radiation could be enough to reverse this global warming.

In case the weather gets out of control

Specifically, the researchers are planning to use a real raft Bubbles as big as Brazil. All on the side of the Lagrange point L1. The point in space between the Earth and the Sun where the gravitational effects of the two bodies cancel. The optimal position might actually be a bit closer to our sun and a stabilization mechanism for the raft – possibly based on the geometry of the raft – would then be necessary.

The shells of these space bubbles could be made of a thin layer of general
Symbol: Si Atomic number: 14 Electrons per energy level: 2, 8, 4 Atomic mass: 28.0855 Most stable isotopes: 28 Si stable with 14…” data-image=” /images /midioriginal/0/1/8/0187c0d646_59608_1024px-12-inch-silicon-wafer.jpg” data-url=” /” data -more=”Read more”>silicon or a building materials, intelligent materials, ecological materials…
A…” data-image=”” data-url=” .com/sciences/definitions/physics-material-15914/” data-more=”Read more”>material strengthened with graphs. That remains to be clarified. The researchers have already started a series of tests. To find out if it is possible to inflate silicone bladders in conditions similar to those in space. Under a Print about 0.0028 the atmosphere only and at a temperature of about -50°C. However, further studies are needed to be certain of selecting the right material and determining the ideal thickness of the envelope for these space bubbles.

The technology to inflate them in space also has yet to be developed. Just like the one who manages to hurl the bubbles into space. Why not, some kind of magnetic accelerator?

According to the researchers, the great advantage of their project is that this raft of space bubbles does not directly interfere with terrestrial ecosystems. And should therefore pose less risk to our planet. But this remains to be verified. This raft could also be destroyed quite simply – which begs the question from another perspective sustainability, because researchers estimate it could be useful for 50 to 200 years – if it has become redundant – or if it has unexpected side effects. All without generation space debris to important. And even gradually, to avoid too severe a shock for our planet and its inhabitants.

But before such a raft can float in space, a lot of work is still needed. Work that MIT researchers feel is necessary to begin. To be ready if our climate spirals out of control. Because they also remind us that such a project can in no way replace efforts to limit ours emissions To understand global warming, we need to understand its connection with the natural phenomenon of….” poilaumenton-flickr-01.jpg” data-url=” effet-serre-5381/” data-more=”Read more”>greenhouse gases and adaptation to global warming.

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