Continuous wildfires threaten public and ecosystem health under climate change across continents

Highlights

● Wildfire and emission patterns vary globally, intensifying at high latitudes.

● Climate change-driven warming and drought are key in wildfire patterns.

● Wildfires impact health, especially in high-emission areas, lack management.

Abstract

Wildfires burn approximately 3%–4% of the global land area annually, resulting in massive emissions of greenhouse gases and air pollutants. Over the past two decades, there has been a declining trend in both global burned area and wildfire emissions. This trend is largely attributed to a decrease in wildfire activity in Africa, which accounts for a substantial portion of the total burned area and emissions. However, the northern high-latitude regions of Asia and North America have witnessed substantial interannual variability in wildfire activity, with several severe events occurring in recent years. Climate plays a pivotal role in influencing wildfire activity and has led to more wildfires in high-latitude regions. These wildfires pose significant threats to climate, ecosystems, and human health. Given recent changes in wildfire patterns and their impacts, it is critical to understand the contributors of wildfires, focus on deteriorating high-latitude areas, and address health risks in poorly managed areas to mitigate wildfire effects.

Graphical abstract

Keywords

Wildfire activity / Wildfire emissions / Climate change / Air quality

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 42077194, 42061134008, and 42377098), the Shanghai International Science and Technology Partnership Project (China) (No. 21230780200), and the Shanghai General Project (China) (No. 23ZR1406100).

Conflict of Interests

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