Ambient PM 2.5 pollution is a substantial threat to public health in global megacities. This
paper reviews the PM 2.5 pollution of 45 global megacities in 2013, based on mass …

By learning the PM2. 5 readings and meteorological records from 2010–2015, the severity of
PM2. 5 pollution in Beijing is quantified with a set of statistical measures. As PM2. 5 …

The official air-quality statistic reported that Beijing had a 9.9% decline in the annual
concentration of PM2. 5 in 2016. While this statistic offered some relief for the inhabitants of …

A regional haze with daily PM2. 5 (fine particulate matters with diameters less than 2.5 µm)
exceeding 500 µg/m3 lasted for several days in January 2013 over North China, offering an …

The online coupled Weather Research and Forecasting-Chemistry (WRF-Chem) model was
applied to simulate a haze event that happened in January 2010 in the North China Plain …

Severe PM 2.5 pollution was observed frequently in Beijing. We conducted highly time-
resolved measurements of inorganic ions associated with PM 2.5 at an urban site in Beijing …

Particulate matter (PM) pollution is a serious issue that has aroused great public attention in
Beijing. To examine the seasonal characteristics of aerosols in typical pollution episodes …

Four extreme haze episodes occurred in October 2014 in the North China Plain (NCP). To
clarify the formation mechanism of hazes in autumn, strengthened observations were …

Air quality is significantly influenced by the synoptic, regional and local meteorological
conditions. This study aims at elucidating the relation between synoptic flow patterns and …

Despite the stringent emission reduction measures implemented in Beijing over the past
decade, a series of unprecedentedly severe haze events hit this megacity in January 2013. It …