Organic aerosols (OAs) account typically for 20–90% of fine particles (PM 2.5) in the lower
troposphere. They contribute to a wide range of environmental problems, from local issues …

Objectives Many residents in Bei**g use disposable face masks in an attempt to protect their
health from high particulate matter (PM) concentrations. Retail masks may be certified to …

Secondary organic aerosol (SOA) is known to account for a major fraction of airborne
particulate matter, with significant impacts on air quality and climate at the global scale …

To investigate the characteristics of PM 2.5 and its major chemical components, formation
mechanisms, and geographical origins in the two megacities, Chengdu (CD) and …

As major chemical components of airborne fine particulate matter (PM 2.5), organic carbon
(OC) and elemental carbon (EC) have vital impacts on air quality, climate change, and …

ABSTRACTPM2. 5 is the major pollutant in most cities of China, especially contributed
significantly to the poor air quality in Bei**g. This study aimed to investigate the long-term …

The interaction of aerosols and the planetary boundary layer (PBL) plays an important role
in deteriorating urban air quality. Aerosols from different sources may have different effects …

OH radicals in the air maintain the oxidizing power of the troposphere. A conventional view
is that particulate matter (PM) in the atmosphere is a major sink of OH radicals, thereby …

To investigate the air quality improvement during 2022 Bei**g Winter Olympic Games
(WOG), continuous hourly observations of fine particulate matter (PM2. 5) and chemical …

The pollution emitted by power plants is a continuing environmental problem around the
world. Recently, China has proposed new regulations limiting emissions. The new …