East Asia and Southeast Asia have been identified as a global hot spot, with the fastest ozone increase. This paper presents the most comprehensive observational review of ozone distributions and evolution over East Asia and Southeast Asia across different spatiotemporal scales in the past two decades, which will have important implications for assessing ozone impacts on public health and crop yields and for developing future ozone control strategies.

This study investigated the evolution of biomass and water-soluble organic matter (WSOM) derived from coal combustion during an aqueous photochemical process. The results indicate that photochemical aging induces distinct changes in the optical and molecular properties of WSOM. More pronounced alterations were observed during OH photooxidation than direct photolysis. Our results also demonstrate that atmospheric photooxidation may represent a significant source of black-carbon-like substances.

We analyze various projections of African aerosol emissions and their potential impacts on climate and public health. We find that future emissions vary widely across emission projections, with differences in sectoral emission distributions. Using the Oslo chemical transport model, we show that air pollution exposure in some regions of Africa could increase significantly by 2050, increasing pollution-related deaths, with most scenarios projecting aerosol-induced warming over sub-Saharan Africa.

Local and upstream specific humidity is the main factor determining non-monsoon season d-excess variability over southeast Tibetan Plateau (TP) due to the intrusion of cold and dry air from upper levels. During the summer monsoon season, d-excess and δ¹⁸O mainly reflect the effect of raindrop evaporation which leads to lower vapor δ¹⁸O but higher d-excess values. These findings provide new insights into using water isotopes to track moisture sources and dynamics over the TP.

This atmospheric modelling study focuses on the radiative and climatic impacts of coarse-aerosol scattering in the long-wave range. The impact of this process on several climate variables is studied, showing, in particular, significant changes in long-wave radiation and daily surface minimum temperature. Other changes in atmospheric fields are also simulated. The findings of this study highlight the importance of incorporating aerosol scattering in the long-wave spectrum in climate models.

Our paper investigates whether it is possible to observe continuous injections of 1 and 2 Tg S y^-1 (sulfur per year) into the stratosphere with the currently active satellite occultation instruments. The calculations show that, considering the natural variability and the assumptions made here, the stratospheric aerosols formed from continuous emissions of 1 and 2 Tg S y^-1 in the quasi-steady-state phase can be detected, which is not the case in the first month of the 2-year initial phase.

We investigated the impact of the shortwave water vapour continuum absorption on clear-sky shortwave radiative feedback. For current temperatures, the impact is modest (<2%). In a warmer world, continuum-induced uncertainty in estimated feedback would be up to ~5%. Representing continuum absorption with the widely used semi-empirical model in radiative transfer calculations leads to an underestimation of this feedback. Constraining the shortwave continuum will help reduce these discrepancies.