An attempt to cool the planet with artificial analogues of volcano emissions will lead to a rapid increase in hurricanes in the tropics and other catastrophic consequences, the scientists say.
“The results of our calculations show that” solar “geoengineering on a local or global scale is an extremely risky strategy for combating global warming – in some regions it will lead to the necessary consequences, and in others it will cause a catastrophe. issue and have introduced appropriate restrictions on such practices, “said Anthony Jones of the University of Exeter in the United Kingdom.
It is believed that aerosols – microscopic drops of liquid substances and solid particles – reflect some of the sun’s rays and condense moisture in the clouds, which noticeably “cools” our planet. As scientists believe, most of the aerosols are formed due to two processes – volcanic eruptions and reactions between pairs of ammonia and sulfuric acid in the lower layers of the atmosphere.
As recent climatic studies show, a sharp increase in the concentration of aerosols in the atmosphere over the past 10-15 years is one of the reasons why global warming slowed down somewhat in 2000. Therefore, many scientists today are seriously thinking about how to start artificially sowing Earth’s atmosphere with aerosols for an even greater slowdown in warming.
In recent years, scientists have begun to doubt this – calculations show that volcanic aerosols can not only cool the planet, but also accelerate the melting of glaciers and cause other dangerous side effects that can do more harm than good. Jones and his colleagues tried to assess their strength using computer models of the upper atmosphere of the Earth.
As these calculations have shown, “sowing” of the stratosphere with a large number of aerosols will lead to completely different consequences for the northern and southern hemispheres. For example, the frequency of powerful hurricanes and vortices in the northern tropics, according to climatologists, will drop noticeably, dropping by about 20-25%, while in the south they will begin to occur 50-75% more often when an equivalent number of particles are added to the atmosphere.
And the one and the other option has negative consequences. In the first case, a decrease in the intensity of hurricanes and vortices will lead to increased droughts in the desert regions of Africa and Asia, and the increase in typhoons and cyclones in the Pacific and Indian Oceans will make the life of the inhabitants of the islands and the coasts of Asia, Australia and Africa even more complex than it is today. In other words, any unilateral attempts to cool the Earth by residents of one of the countries of the southern or northern hemisphere will cause negative consequences for the inhabitants of the second half of the planet.
The strength of these effects, as noted by scientists, will be such that even attempts to keep the temperature rise at around 1.5 degrees Celsius, rather than lower them, will lead to negative consequences. All this, according to Jones and his colleagues, should make both scientists and officials treat such projects and initiatives with extreme caution.