Over the next century, higher temperatures and an increased number of droughts will hit the global barley supply, pushing beer prices way up. University of East Anglia economist Dabo Guan and his colleagues developed multiple scenarios based on several climate and economic models. Nature:
The researchers then simulated the effect of these droughts and heat waves on barley production by using software to model crop growth and yield on the basis of weather and other variables.
They found that, globally, this extreme weather would reduce barley yield by between 3% and 17%. Some countries fared better than others: tropical areas such as Central and South America were hit badly, but crop yields actually increased in certain temperate areas, including northern China and the United States. Some areas of those countries saw yield increases of up to 90% — but this was not enough to offset the global decrease.
Finally, Guan and his colleagues fed these changes in barley yield into an existing economic model that can account for changes in supply and demand in the global market. This enabled them to look at how reduced barley production would affect pricing and consumption of beer in countries, as well as trade between nations.
In the worst-case scenario, the reduced barley supply worldwide would result in a 16% decrease in global beer consumption in the years of extreme-weather events. Prices would, on average, double...
One goal of the research, Guan says, was to make tangible how "climate change will impact people’s lifestyle... (If people) want to drink beer when we watch football, then we have to do something."
painting: François Jaques, "Peasants Enjoying Beer at Pub in Fribourg" (Switzerland, 1923)
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