As has been the case in North America and western Europe, the SO 2 emissions have
substantially reduced in the North China Plain (NCP) in recent years. Differential rates of …

As primary emissions have been declining in recent decades in China, secondary pollution,
like ozone (O 3) and secondary aerosols are main pollutants deteriorating air quality. The …

Fine particulate matter (PM 2.5) and surface ozone (O 3) are major air pollutants in
megacities such as Delhi, but the design of suitable mitigation strategies is challenging …

Particulate nitrate (NO3–) has currently become the major component of fine particles in the
North China Plain (NCP) during winter haze episodes. However, the contributions of …

Extremely high levels of atmospheric sulfate aerosols have still frequently occurred in China
especially in winter haze periods and often been underestimated by models due to some …

Size-segregated aerosols collected in Bei**g from 2021 to 2022 were used to investigate
the contribution of organic aerosols to the aerosol liquid water content (ALWC), the …

To better understand the characteristics and transformation mechanisms of secondary
inorganic aerosols, hourly mass concentrations of water-soluble inorganic ions (WSIIs) in …

Hygroscopicity of aerosol (κchem) is a key factor affecting its direct and indirect climate
effects, however, long‐term observation in Delhi is absent. Here we demonstrate an …

We present in this technical note the research protocol for phase 4 of the Air Quality Model
Evaluation International Initiative (AQMEII4). This research initiative is divided into two …

Atmospheric ammonia (NH 3) as the most important alkaline gas in the atmosphere has
attracted much attention in recent years due to its critical role in haze formation, especially …