Climate Change Is Redrawing the Map

Goal: After this lesson you can explain how a warming climate threatens coffee land and name the main ways farmers are adapting. Subject: Geography | Run time: about 6 minutes

Quick recall

Last time we toured the big producers. Two quick questions. One: why does Colombia grow only Arabica? Its high Andean altitude and climate suit Arabica (Federación Nacional de Cafeteros de Colombia, 2023). Two: why does Ethiopia's wild coffee matter? It holds genetic diversity found nowhere else (Davis et al., 2012).

Why this matters

Here is the hard part of the geography. By 2050, up to half of the land that grows coffee today could become unsuitable for it (Bunn et al., 2015). Not gone, but too hot, too dry, or too erratic for the picky plant we met two lessons ago.

The idea

Remember why coffee is fragile. Arabica wants a narrow band of mild temperature and steady rain (Davis et al., 2012). Warming pushes past that band. As temperatures rise, the comfortable zone creeps up the mountains, and a farm that worked for generations can fall out of range (Bunn et al., 2015). This is not a far-off forecast. The signals are already in the price and the harvest. In 2024, drought and frost in Brazil helped drive a roughly 70 percent jump in coffee prices in a single year (Rabobank, 2024). Colombia went through about 13 straight months of excessive rain across 2023 and 2024 (Rabobank, 2024). Ethiopia has been working through a multi-year drought (Rabobank, 2024). Different countries, the same theme: the weather coffee depends on is getting less dependable. So what do you do about it? Farmers are leading the response, often ahead of any policy (World Bank, 2023). Three moves come up again and again. Plant higher, where the air is still cool enough. Grow under shade trees, which steady the temperature and the soil. And switch to cultivars bred to handle heat and drought (World Bank, 2023). This is also where Ethiopia's wild diversity earns its keep. That gene pool is the raw material breeders draw on to build the tougher coffee plants of the future (Davis et al., 2012).

Picture it

Picture the green belt from our first lesson, but imagine the comfortable zone inside it sliding slowly uphill and toward the poles as the planet warms. Farms near the warm edge drop off the map. Farms with mountain above them can follow the cool upward, for a while. Farms with no higher ground to climb are the ones in trouble.

Remember this

The fact to carry out: coffee's narrow range makes it an early warning system for climate change. Up to half of today's coffee land could be unsuitable by 2050, and farmers are adapting by planting higher, adding shade, and breeding hardier plants (Bunn et al., 2015; World Bank, 2023). When you hear that coffee got more expensive, the weather is usually part of the reason.

Quick check

Quick check. Name one way farmers are adapting coffee farms to a warmer climate. Any of these: planting at higher elevation, growing under shade trees, or switching to heat and drought resistant cultivars (World Bank, 2023).

Key Takeaways

By 2050, up to half of current coffee-growing land could become unsuitable as the climate warms (Bunn et al., 2015).
The strain is already visible: Brazil drought and frost helped drive a roughly 70 percent price jump in 2024 (Rabobank, 2024).
Farmers adapt by planting higher, using shade trees, and switching to hardier cultivars, often ahead of policy (World Bank, 2023).
Ethiopia's wild genetic diversity is the breeding stock for climate-resilient coffee (Davis et al., 2012).

Sources

Bunn, C., Läderach, P., Ovalle Rivera, O., & Kirschke, D. (2015). A bitter cup: Climate change profile of global production of Arabica and Robusta coffee. Climatic Change, 129(1-2), 89-101. https://doi.org/10.1007/s10584-014-1306-x
Davis, A. P., Gole, T. W., Baena, S., & Moat, J. (2012). The impact of climate change on indigenous Arabica coffee (Coffea arabica). PLOS ONE, 7(11), e47981. https://doi.org/10.1371/journal.pone.0047981
Rabobank. (2024). World coffee map 2024: Climate challenges and price volatility. Rabobank Food and Agribusiness Research.
World Bank. (2023). Climate change and coffee production: Economic impacts and adaptation strategies. https://climateknowledgeportal.worldbank.org