Wildfires are not only devastating in the immediate aftermath, but they also leave behind invisible climate change agents in the form of smoke particles. These particles have the potential to alter the Earth’s climate by enhancing the absorption of sunlight and warming the atmosphere. However, a recent study has shed light on a specific type of smoke particle, dark-brown carbon (d-BrC), which is proving to be a more potent snow-warming agent than previously thought.
Researchers at Washington University in St. Louis have delved into the world of d-BrC and its impact on the environment. Unlike its counterpart, black carbon, d-BrC is light absorbing, water insoluble organic carbon that has been largely underestimated in terms of its snow-warming potential. In fact, it has been found to be 1.6 times more potent than black carbon in darkening and decreasing the reflectance of snowy surfaces.
The research team at WashU likens d-BrC to the “evil cousin” of black carbon, as both particles are deposited on snow caps from wildfires, causing a significant impact on the surrounding environment. These particles cannot be easily removed or bleached away, leading to a reduction in snow reflectivity and subsequent warming of the snow. This, in turn, contributes to an increase in air temperatures and exacerbates the warming cycle.
The discovery of d-BrC’s significant role in snow melt from wildfire smoke deposition has major implications for climate models and measurements. By previously underestimating the impact of d-BrC, researchers have skewed their predictions and assessments of climate change. Taking into account the presence of d-BrC will lead to more accurate climate models and a better understanding of the effects of wildfires on the environment.
As wildfires continue to increase in frequency and intensity, it is crucial to further investigate the effects of d-BrC on the environment. The research team at WashU plans to conduct real-world experiments to observe the impact of d-BrC on snow melt and surrounding air temperatures. By using a specially designed snow globe in the lab, they are able to simulate snow-aerosol interactions and study the behavior of d-BrC in a controlled environment.
The study of d-BrC and its role in snow melt from wildfire smoke deposition is shedding new light on the hidden effects of wildfires on the climate. By understanding the impact of these smoke particles, we can develop better strategies for mitigating their effects and reducing anomalous snow melt. As we continue to face the challenges of climate change, research like this will be crucial in developing a more sustainable future for our planet.
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