How Traffic Pollution Affects the Atmospheric Electric Field in Tel Aviv
A recent study conducted in metropolitan Tel Aviv, Israel, has shed light on the impact of traffic patterns on the electric field generated by Earth’s atmosphere. Led by researchers from The Hebrew University of Jerusalem, the study utilized detailed measurements collected in the city of Holon in 2024, correlating the data with air quality information over a seven-month period.
The researchers focused on tracking specific pollutants such as gases and particles from car emissions, tire wear, and chemical reactions in the atmosphere. By analyzing the data from fair weather days, they were able to filter out interference from rain and storms, providing a clearer picture of how traffic pollution influences the atmospheric electric field.
According to the published paper by the researchers, the study examined the relationship between fine particulate matter (PM2.5), nitrogen oxides (NOx), and the Potential Gradient (PG) – a proxy for the atmospheric electric field near the ground. The results revealed a direct link between traffic pollution and fluctuations in the electric field, especially during peak traffic hours.
One interesting finding was the delayed impact of PM2.5 particles on the electric field, suggesting differences in particle size, chemical composition, and atmospheric lifetime. Additionally, the researchers observed a weekend effect, with reduced traffic pollution correlating with a weakening of the atmospheric electric field.
Geoscientist Roy Yaniv from The Hebrew University of Jerusalem highlighted the rapid response of the electric field to nitrogen oxides during traffic rush hours, emphasizing the immediate influence of emissions on atmospheric conductivity. This study adds to previous research demonstrating how urban air pollution can affect the electric field surrounding us.
While these changes in the electric field are not harmful and do not pose a threat to weather systems or technology, they provide valuable insights into the impact of traffic pollution on air quality. By integrating air quality data into atmospheric electricity studies, researchers can better understand the interplay between urban pollution and the local electric field, with implications for public health.
Overall, this research underscores the importance of monitoring air pollution in densely populated regions like Tel Aviv and highlights the potential of electric field measurements in tracking pollution levels across cities.
The study has been published in Atmospheric Research.
