Sunday, August 09, 2020

Europe Will Dry Up

Extreme droughts are likely to become much more frequent across central Europe, and if global greenhouse gas emissions rise strongly they could happen seven times more often, new research show.

The area of crops likely to be affected by drought is also set to increase, and under sharply rising CO2 levels would nearly double in central Europe in the second half of this century, to more than 40m hectares (154,440 sq miles) of farmland.

Central Europe suffered its biggest and most damaging drought on record in 2018 and 2019, which had two of the three warmest summer periods ever recorded on the continent. The summers were also much drier than average, and more than half of the region suffered severe drought conditions. Rivers and watercourses dried up, some crops were ruined and wildfires increased during these two years of extreme drought. 

Researchers from UFZ-Helmholtz Centre for Environmental Research in Leipzig, Germany, were able to forecast that moderate reductions in greenhouse gases from their current levels would halve the likelihood of such extreme droughts, and shrink the affected land area by nearly 40%.

“The findings indicate that introducing measures to reduce future carbon emissions may lower the risk of more frequent consecutive drought events across Europe. On the one hand, we need to step up our efforts to reduce greenhouse gases worldwide, and at the same time deal with strategies to adapt to climate change.” Rohini Kumar, one of the authors of the study, explained.

 The study adds to an increasing body of research showing the impacts of global heating on Europe. Previous studies have suggested that southern and central Europe will experience more drought, with one study projecting that European cities will become much hotter, with London forecast to have a climate more like Barcelona by 2050 and southern and central European cities seeing more extreme levels of heat. 

Constantin Zohner, of the Crowther Lab at the Swiss Federal Institute of Technology in Zurich, said the study showed the consequences of failing to curb greenhouse gas emissions.

“These findings are an important warning to the world that continued emissions will strongly exacerbate future drought events, threatening ecosystems, agriculture and human wellbeing,” he told the Guardian. “The study, once more, highlights the urgent need for climate action in order to maintain the functionality of ecosystems and ensure water supply to future generations.”

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