Vehicle Emissions and their effect on the climate of Sichuan Basin, China

A study conducted in Sichuan Basin, China tested for carbonaceous aerosols in three different sites during the winter. It is already known that carbonaceous aerosols pose a threat to the environment, but what is not known is where they come from or their effect on light absorption. Studying carbonaceous aerosols and finding out what processes and resources are responsible for the release of particulate matter will assist scientists in finding ways to use more environmentally sustainable materials and processes. The findings of the experiments that were conducted showed that across the board, vehicle emissions were the highest contributor of Pm 2.5, or particulate matter. This is an important finding because it shows that vehicle emissions are responsible for the release of a large percentage of environmentally harmful particles. Furthermore, vehicle emissions were also found to be the highest producer of brown carbon, which is one of the primary kinds of pollutants in the area. Brown carbon can lead to reduced atmospheric visibility and light absorption. Pollutants that have the ability to absorb light will also have a warming effect, commonly known as climate change. One of the ways that this research could be used is by implementing air pollution mitigation policies in developing countries. Developing countries will begin to grow and their will likely be a significant increase in the usage of vehicles. Using these new findings, governments will be able to take preemptive measures to try and minimize the pollution that would be caused by vehicle emissions. 

Figure: The absorption and contributions of vehicle emission and biomass burning and other sources for brown carbon (Liu et al.). 


Reference: Song Liu, Tianzhi Luo, Li Zhou, Tianli Song, Ning Wang, Qiong Luo, Gang Huang, Xia Jiang, Shuhua Zhou, Yang Qiu, Fumo Yang. 2022. Vehicle exhausts contribute high near-UV absorption through carbonaceous aerosol during winter in a fast-growing city of Sichuan Basin, China. Environmental Pollution, 312:119966

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