Brown carbon, a characteristic emission from wildfires, was tracked over a week in July 2026, revealing its impact on deteriorating air quality in various regions of the U.S. and Canada. This type of carbon, distinct from black soot, absorbs sunlight and contributes to atmospheric warming, in addition to being a significant component of fine particulate pollution.

Monitoring these emissions is crucial for understanding the dispersion and atmospheric impact of wildfires, which are becoming increasingly frequent and intense. Studying their trajectory and concentration allows for the assessment of public health and climate risks in affected areas, as well as the development of more accurate predictive models for future events.