Air pollution has become one of the most important environmental problems in densely populated areas of the world, particularly in developing countries, and has a significant impact on climate change, ecosystem services, and human health.

Air pollution and climate interact in numerous ways and continue to be a matter of intense study. Many notable gaps exist in the knowledge around these subjects that warrant further research in the field of interactions between aerosols, trace gases, and climate. Among these gaps in the knowledge are the spatiotemporal distributions, vertical profiles, and hotspots analyses and characterizations of aerosols and trace gases, quantification of radiative forcing and global warming due to aerosols and trace gases, and their impact on clouds and precipitation processes. In addition, the long-term monitoring of air pollution and its effects is emphasized.

Further research on these topics will help to understand the role of aerosols and trace gases in improving the understanding of climate change mechanisms and reducing uncertainties in climate prediction models. To understand the air pollution-climate interactions, we require improved and more comprehensive measurements through the use of innovative methods and advanced remote sensing technologies.

This special issue aims to collect original research and review articles focused on topics in the scope of aerosols and trace gases monitoring, their properties, and interactions, along with their relationship with climate.

Potential topics include but are not limited to the following:

• Spatiotemporal distribution and transport of aerosols and trace gases
• Interactions between atmospheric composition and climate change
• Variability of aerosol and trace gases with meteorological parameters
• Discriminating aerosol types (i.e., dust, black carbon, organic carbon, sea-salt, and sulphate) and their vertical profiles
• Trace gases (i.e., SO2, O3, NO2, CO2, and CO) distributions with height
• Natural and anthropogenic emissions of aerosols and trace gases