The research foci in the MICS-Asia III study include the following aspects: development of reliable emission inventories in Asia; ability and uncertainty of current air quality models in Asia in predicting ozone, nitrogen oxides, VOC, sulfur oxides, PM_2.5, etc.; ability of online coupled models to simulate aerosol radiative forcing and ozone and aerosol–weather/climate interaction through aerosol–radiation–cloud feedback; and prediction of future air pollution and climate. The special issue is open to all publications that inform about these aspects and provide answers to the MICS-Asia III scientific questions.

• What is the ability of models to reproduce pollutant concentrations of photochemical smog under highly polluted conditions (regional haze) and to model a sharp PM_2.5 increase such as the episodes between January 2010 and March 2018?
• What are the uncertainties of process (physical and chemical processes) and model resolutions (horizontal and vertical) in air quality modelling? In particular, uncertainties in key boundary layer parameters, which have both direct and indirect impacts on modelling results by transporting meteorological fields and providing parameters in physical/chemical modules, respectively, need to be addressed.
• What are the air quality responses to specific emission perturbations in a common case?
• What are the impacts of anthropogenic emissions on radiation and climate change over East and Southeast Asia?

We especially welcome the publications related to MICS-Asia Phase III studies to inform the research community about the recent findings and progress of air quality and regional climate change studies over East and Southeast Asia. The findings from these publications will also help to better understand capability, uncertainty, and future direction within the current CTMs.