Climate Change Threatens the Flavor of Beer As Noble Hops Decline

With a fresh fizz and hoppy scent, a cold beer is a drink that touches all of our senses. But as our climate changes, so too might the flavor profile of one of the world’s most popular drinks.

Few beverages evoke the same familiar satisfaction as a freshly poured beer. Its complex, tantalizing flavor is a blend of bitter and sweet elements, delivered by hops, yeast, and malted barley. However, climate change poses a significant threat to the brewing industry, specifically impacting the production of these crucial ingredients.

Barley and hops are central to beer production, and both are facing challenges due to rising temperatures and changing weather patterns. Noble hops, renowned for their distinct flavor in lagers, are particularly affected, with production declining by 20% since the 1970s in key European regions. A key component of hop flavor, alpha acids, are projected to decrease by 31% by 2050.

The history of beer-making extends back thousands of years, with early brewing techniques focusing on fermenting grains to create intoxicating beverages. Hops, initially used as a preservative, became vital to balancing the sweet malt taste with their bitter flavor, particularly after the Industrial Revolution made it easier to produce lighter, cleaner lagers.

During the medieval ages, hops helped prevent beer from spoiling by adding antimicrobial benefits. As brewing processes evolved, hops became essential for their aromatic qualities, providing a crucial balance to the sweet flavors of malt.

The widespread use of noble hops in regions like Czechia, Germany, and Slovakia began in earnest after the Industrial Revolution. These hops impart a distinct flavor that has contributed to the popularity of lagers around the world.

Climate change has significantly impacted the growth patterns of noble hops. Warmer temperatures have advanced the growing season by about 13 days in Germany and Czechia between 1970 and 2018, and ripening has moved 20 days earlier. Projections indicate that noble hop yields across key regions will decline by up to 18.4% by 2050, alongside a similar drop in alpha acid content.

Higher temperatures and droughts challenge hop cultivation, though irrigation can mitigate some effects. However, at the extreme temperatures of about 46°C (116°F), hop plants cease growth, and some diseases become more prevalent in hotter conditions.

Brewers are exploring various strategies to adapt to climate change. Switching to hardier hop varieties and implementing sustainable practices are among the methods being considered. Some hop farmers are introducing regenerative agricultural techniques, such as cover cropping and the use of biochar, to improve soil health and water retention.

Developing new hop varieties resistant to climate stress is