Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6317122 | Environmental Pollution | 2013 | 10 Pages |
Abstract
The spatial and temporal distribution and the flux of black carbon (BC) concentration in Beijing were continuously investigated over a two-year period at five sites to highlight the relative influence of contributing sources. The results demonstrate firstly that there is significant spatio-temporal variability of BC in Beijing. Highest concentrations occurred during winter primarily due to stagnant meteorological conditions, and seasonal BC sources, such as coal combustion for heating purposes. Biomass burning was identified as a minor seasonal source during the summer months. BC also varied spatially with higher concentrations in the SE of Beijing and lower concentrations in the NW, due to the differing emission intensity of various local BC sources such as traffic and industry. Frequently, overnight BC concentrations were higher due to specific meteorological conditions, such as the lower urban mixing layer height and various anthropogenic activities, such as exclusive night-time heavy duty vehicle traffic in the inner-city.
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Nina Schleicher, Stefan Norra, Mathieu Fricker, Uwe Kaminski, Yizhen Chen, Fahe Chai, Shulan Wang, Yang Yu, Kuang Cen,