| Popis: |
This study investigates the relationship between rice yields, climate change, and carbon dioxide (CO2). We integrate gridded climate data in the growing seasons and Asian rice yield data reported by the Food and Agriculture Organization with free air carbon dioxide enrichment (FACE) experimental data. Using those data, we estimate prediction models of rice yields that evolve over time and decompose effects of climate, CO2, and technological progress. The results show that atmospheric CO2 has significantly increased rice yields, with the contribution accounting for 29% to 33% of the observed yield growth. The results also reveal that increases in temperature decrease rice yields in parts of Asia, implying that both CO2 mitigation and climate change are yield growth depressing factors. The finding suggests a potential need for more agricultural research and development investment to offset CO2 mitigation and climate change effects. |
