Overview
- The peer‑reviewed study published Tuesday found that extreme wet‑season rainfall, not heat or broad drought, is the strongest climate‑related driver of year‑to‑year cocoa yield swings across major producing regions.
- In Ghana the researchers used two decades of district production records and daily weather data to show excess wet‑season rain plus dry‑season drought explains about two‑thirds of annual harvest variability.
- Very heavy rain damages tiny cocoa flowers and young pods and increases spread of fungal diseases such as black pod by splashing spores from soil onto fruit.
- Because the damaging rains link to large climate patterns like El Niño and Atlantic sea‑surface changes, the team is building seasonal forecasting and timing‑specific responses but faces limits from weak regional models, forecast capacity, and farm infrastructure.
- The finding matters for nearly six million smallholders and global supplies after 2024 price shocks, yet adoption of fixes such as drainage, timed fungicide, and more canopy cover will be constrained by costs, aging trees, and other non‑climate pressures.