Global food security is threatened by climate change and conflicts. This study demonstrates that timely satellite-based crop harvest forecasting in major exporting regions can trigger production responses in the opposite hemisphere, offsetting short-term fluctuations and stabilizing global food supply. Forecasting reduced price fluctuations by 1.1 to 12.5 percentage points for wheat in Russia and Ukraine, and even reversed price shocks for soybeans in Brazil. This cross-hemispheric response, leveraging seasonal lags in crop calendars, improves global food security.
