気候変動がグローバルな農業に与える影響（再掲）
令和7年2月13日|p.39
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The Impact of Climate Change on Global Agriculture
Climate change poses significant challenges to global agriculture, affecting crop yields, food security, and livelihoods worldwide. Rising temperatures, altered precipitation patterns, and increased frequency of extreme weather events are among the key drivers impacting agricultural systems.
Key Impacts
- Reduced crop productivity due to heat stress and water scarcity.
- Increased prevalence of pests and diseases in warmer climates.
- Disruption of planting and harvesting cycles due to unpredictable rainfall.
Figure 1: Projected changes in global temperature by 2050 under different emission scenarios.
$\Delta T = \alpha \cdot CO_2 + \beta \cdot CH_4$
| Region | Average Yield Change (%) |
|---|
| Sub-Saharan Africa | -15 |
| South Asia | -10 |
| North America | +5 |
*Data sourced from IPCC Sixth Assessment Report (2021).