Greenhouse gases increase extreme rainfall

According to a study recently published in the electronic library Geophysical Research Letters, once the Earth warms due to the increasing concentration of greenhouse gases, the intensity of extreme rainfall increases.

The study (by scientists from the Institute of Climate-Satellite Cooperation of the University of North Carolina (CICS-NC), the National Climate Resource Center of the American Meteorological and Hydrological Agency (NCDC), Institute Desert studies, the University of Wisconsin-Madison and the ERT Institute do) suggest that increased humidity due to warmer atmospheres will dominate all factors, leading to increased rainfall with the highest intensity "a remarkable way ".

According to a recent study, greenhouse gases will increase the intensity of extreme rainfall occurrences - (Photo: wikimedia.org)

'We are confident that more and more extreme rainfall will occur as the atmosphere will always be supplied with water -' fuel source 'for extreme rain' , Kenneth Kunkel - senior research professor at CICS -NC, say.

The study also found that by the end of the 21st century, rainfall will increase by a maximum of 20-30% across most of the Northern Hemisphere if the greenhouse gas continues to be released at high intensity.

The researchers said they looked at three factors that could lead to maximum rainfall anywhere, including atmospheric humidity, atmospheric vertical movement and wind. horizontal The team also studied climate model data to understand how high greenhouse gas emissions cause heavy rain.

They found that the greenhouse gas did not significantly change the maximum vertical movement of the atmosphere or the wind in the horizontal direction, but if the maximum humidity in the atmosphere increased by 20-30%, the maximum rainfall also increased. like that.

'The findings of this study and similar studies can provide the latest information for engineers and investors in ensuring people's safety and investment in infrastructure. important ' , Thomas R. Karl - director of NCDC and co-author of the study said.

Specifically, the above findings can be used as a 'standard design value' to design reservoirs, flow control works such as dams, culverts, canals, ponds, etc., thereby reducing the level of risk. ro caused by special heavy rains.