Fengkui Duan

TL;DR: In this paper, a model-assisted analysis of the hourly observation data of PM2.5 and its major chemical compositions was performed to understand extreme haze episodes repeatedly shrouded Beijing during the winter of 2012-2013, causing major environmental and health problems.

TL;DR: Based on PM2.5 chemical data sets from literature and from surface observations, chemical species and reconstructed speciation of PM2.5 in representative Chinese megacities and across China were compared to draw insights into the characteristics of PM 2.5 speciation as mentioned in this paper.

TL;DR: In this article, the effect of heterogeneous chemistry on haze formation in China by using the 3-D models was evaluated using the WRF-CMAQ model with newly added heterogeneous reactions and the meteorological anomaly during January 2013 on regional haze formation.

TL;DR: In this paper, daily particulate matter samples were collected during 1 year from 7 November 1997 to 31 October 1998 in Beijing area, at two monitoring sites, the Ming Tomb (a background site) situated northernmost of the basin and the Temple of Heaven (a residential site) inside the city for 110 atmospheric aerosol samples organic carbon (OC) was determined with a two-step thermal procedure using a CHN elemental analyzer, and water-soluble potassium (K+) with flame atomic absorption spectrometry.

TL;DR: Li et al. as discussed by the authors investigated the relationship between levoglucosan and other biomass burning tracers (i.e., water soluble potassium and mannosan) based on both ambient samples collected in Beijing and source samples.