They discover that extreme rains are linked around the world

"Connections in a hemisphere generally work through waves established in the atmosphere.It is like dropping a stone in a pond: the first event sets the waves and these waves can then turn on." Other events "explained the British Brian Hoskins, researcher Imperial College of London and co-author of the study, in dialogue with ambito.com.

Although there is local and regional data, it has not been possible so far to establish the relationship across the world. Scientists have determined that extreme rainfall patterns are linked to gigantic air flows that cross the globe through our atmosphere, thus forming huge waves between the equator and the poles.

"The warming badociated with the increase in greenhouse gases is causing the atmosphere to retain more water and reject even more intense rainfall."

In the badysis, the Extreme precipitation events model, high resolution satellite data and new multiple comparison methodology.

They proved that the extreme rains in the monsoon systems of the South Asia, East Asia and Africa they are almost synchronized. They also discovered links between the south-central Asia, Europe and North America. And they calculated that extreme precipitation in Europe preceded in five days those that took place in India. This does not mean that some generate the others, but that they belong to the same pattern of atmospheric waves: being able to determine which of them will be activated first, it is possible to anticipate the wave's ride.

An information: In 2018, India has suffered more than 400 deaths and 800,000 people displaced by the worst floods following the monsoon rains for nearly a century.

The researcher regretted not having any direct information on Argentina because "We have just developed the technique and we have not yet fully exploited it"although he foresaw that they might discover links "Between the extremes of rain in South Asia with those of West Africa and those of South America".

This information will be the key to weather forecasts. "If we know that an episode of extreme rain in one region tends to precede that of a second five-day region, for example, we will have five days to warn the second region", graficó.

The studies will also provide a valuable database for monitoring the effects of climate change and changing patterns of extreme events that may occur in the future as a result of global warming.

Although Hoskins specified that "These processes are not due to climate change"he has remembered that "The warming badociated with the increase in greenhouse gases causes the atmosphere to retain more water and to reject it during even more intense rains.", For what "It's important to have as many warnings as possible about these more and more harmful events.".

Especially if, as the specialists predict, the extreme phenomena continue to multiply and put themselves in danger. According to a study Potsdam Institute L & # 39; German over the past 30 years, climate change has increased the episodes of heavy rainfall of 12% in different regions of the planet and the concentration of these events over these three decades "Unprecedented".