Scientists have questioned the existence of a main «brake» of global warming

© Illustration RIA Novosti . Alina Planinabulgaria aerosols may be the main obstacle of global warmingScientists have questioned the existence of a main «brake» of global warming© Illustration RIA Novosti . Alina Polyanina

Observations of powerful volcanic eruption in Iceland has helped scientists understand that natural and anthropogenic aerosols cool the planet’s surface is not as strong as previously thought, according to a paper published in the journal Nature.

«We know that aerosols can have a huge impact on the climate, which is especially will show up in how they affect clouds. On the other hand, the strength of their influence remained unmeasured, what prevents us to make forecasts and to predict how climate change in the future. This eruption helped us to clarify this issue,» says Florent, Malavalli (Florent Malavelle) from the University of Exeter (USA).

It is believed that aerosols are microscopic droplets of liquid substances and solid particles reflect part of the sunlight and contribute to condensation in clouds, which significantly «cool» the planet. The majority of climate scientists suggests that a large part of the aerosol formed by the action of ammonia vapors and sulfuric acid in the lower atmosphere.

As recent climate research, a sharp increase in the concentration of aerosols in the atmosphere in the last 10-15 years is one of the reasons why global warming is some slowed down their move in 2000. Therefore, many scientists today think seriously about how to begin to artificially seed the atmosphere with aerosols to further slow the warming.

Malavalli and his colleagues were first able to accurately measure how the emissions of a huge number of aerosols affect climate and the behaviour of the atmosphere, watching the eruption of the volcano in Iceland Holocron in 2014 and 2015.

It tells Malavalli, scientists had expected that getting such a large number of aerosols into the air will not only increase cloud cover, but will make the cloud more dense, which will make them even more to reflect heat than they do in the absence of droplets of sulfur dioxide and other volcanic molecules in the air.

Much to the surprise of scientists, anything similar has not occurred – the clouds did not change its density and brightness, even in those days when emissions of Jaunrauna reached a peak. Accordingly, we can say that the increase in the concentration of aerosols in the atmosphere in recent years has affected the climate much less than used to be considered scientists, and that the reason for the slowing of global warming in the last 10 years may lie in something else.

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