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Europe’s heat and drought crop losses tripled in 50 years: study

The severity of crop losses driven by heat waves and drought have tripled in the last fifty years in Europe, according to a study that highlights the vulnerability of food systems to climate change

By: EBR - Posted: Friday, April 2, 2021

Research published recently in the journal Environmental Research Letters, looked at agricultural production in 28 European countries – the current European Union and United Kingdom – from 1961 to 2018.
Research published recently in the journal Environmental Research Letters, looked at agricultural production in 28 European countries – the current European Union and United Kingdom – from 1961 to 2018.

The severity of crop losses driven by heat waves and drought have tripled in the last fifty years in Europe, according to a study that highlights the vulnerability of food systems to climate change.

Research published recently in the journal Environmental Research Letters, looked at agricultural production in 28 European countries – the current European Union and United Kingdom – from 1961 to 2018.

They compared this to data on extreme weather events – droughts, heat waves, floods and cold snaps – and found evidence suggesting “climate change is already driving increasing crop losses in observational records”.

While all four became significantly more frequent over the 50-year time period, “the severity of heatwave and drought impacts on crop production roughly tripled”, from losses of 2.2% between 1964 and 1990 to 7.3% from 1991 to 2015.

The study found that droughts in particular, which are becoming more frequent, are also becoming more and more intense: “the most severe events become disproportionately more severe”.

Overall, European crop yields still increased in the period, by almost 150% between 1964-1990 and 1991-2015, said lead author Teresa Bras, from the Nova School of Science and Technology in Lisbon.

But losses connected to extreme weather were different depending on the crop.

“Cereals, a staple that occupies nearly 65% of the EU’s cultivated area and is mainly used for animal feed, is the crop most severely affected,” said Bras.

These showed “consistently larger losses” linked to droughts and heat spells than other crops, the report said, intensifying by more than 3% for every drought year.

Researchers said this could be explained by the more widespread irrigation of other crops like vegetables, grape vines and fruit.

Climate change is expected to multiply weather extremes, including heat waves and droughts and the study warned of “ripple effects” from impacts on Europe across the global food system and on food prices.

The study said the punishing heat wave and drought of 2018 in Europe caused a decrease in grain production of 8% compared to the average of the previous five years, “which caused fodder shortages for livestock and triggered sharp commodity price increases”.

Since the 2015 Paris climate deal, the world has experienced its five hottest years on record.

The UN’s Food and Agriculture Organisation has warned that food production is “extremely sensitive” to climate change.

Earlier this month a study published in the journal Nature Geoscience found that recent summer droughts in Europe were the most severe the region has seen in 2,110 years and noted a sudden intensification since 2015.

In 2019, a report in Nature Climate Change warned that changes in the jet stream sharply increased the risk of heatwaves in regions responsible for up to a quarter of global food production – Western North America, Western Europe, Western Russia and Ukraine.

*first published in: www.euractiv.com

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