TY - JOUR
T1 - Radiocarbon-based impact assessment of open biomass burning on regional carbonaceous aerosols in North China
AU - Zong, Zheng
AU - Chen, Yingjun
AU - Tian, Chongguo
AU - Fang, Yin
AU - Wang, Xiaoping
AU - Huang, Guopei
AU - Zhang, Fan
AU - Li, Jun
AU - Zhang, Gan
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/6/5
Y1 - 2015/6/5
N2 - Samples of total suspended particulates (TSPs) and fine particulate matter (PM2.5) were collected from 29th May to 1st July, 2013 at a regional background site in Bohai Rim, North China. Mass concentrations of particulate matter and carbonaceous species showed a total of 50% and 97% of the measured TSP and PM2.5 levels exceeded the first grade national standard of China, respectively. Daily concentrations of organic carbon (OC) and elemental carbon (EC) were detected 7.3 and 2.5μgm-3 in TSP and 5.2 and 2.0μgm-3 in PM2.5, which accounted 5.8% and 2.0% of TSP while 5.6% and 2.2% for PM2.5, respectively. The concentrations of OC, EC, TSP and PM2.5 were observed higher in the day time than those in the night time. The observations were associated with the emission variations from anthropogenic activities. Two merged samples representing from south and north source areas were selected for radiocarbon analysis. The radiocarbon measurements showed 74% of water-insoluble OC (WINSOC) and 59% of EC in PM2.5 derived from biomass burning and biogenic sources when the air masses were from south region, and 63% and 48% for the air masses from north, respectively. Combined with backward trajectories and daily burned area, open burning of agricultural wastes was found to be predominating, which was confirmed by the potential source contribution function (PSCF).
AB - Samples of total suspended particulates (TSPs) and fine particulate matter (PM2.5) were collected from 29th May to 1st July, 2013 at a regional background site in Bohai Rim, North China. Mass concentrations of particulate matter and carbonaceous species showed a total of 50% and 97% of the measured TSP and PM2.5 levels exceeded the first grade national standard of China, respectively. Daily concentrations of organic carbon (OC) and elemental carbon (EC) were detected 7.3 and 2.5μgm-3 in TSP and 5.2 and 2.0μgm-3 in PM2.5, which accounted 5.8% and 2.0% of TSP while 5.6% and 2.2% for PM2.5, respectively. The concentrations of OC, EC, TSP and PM2.5 were observed higher in the day time than those in the night time. The observations were associated with the emission variations from anthropogenic activities. Two merged samples representing from south and north source areas were selected for radiocarbon analysis. The radiocarbon measurements showed 74% of water-insoluble OC (WINSOC) and 59% of EC in PM2.5 derived from biomass burning and biogenic sources when the air masses were from south region, and 63% and 48% for the air masses from north, respectively. Combined with backward trajectories and daily burned area, open burning of agricultural wastes was found to be predominating, which was confirmed by the potential source contribution function (PSCF).
KW - Elemental carbon
KW - Open crop residue burning
KW - Organic carbon
KW - Radiocarbon (C) tracer
UR - https://www.scopus.com/pages/publications/84923868153
U2 - 10.1016/j.scitotenv.2015.01.113
DO - 10.1016/j.scitotenv.2015.01.113
M3 - 文章
C2 - 25747357
AN - SCOPUS:84923868153
SN - 0048-9697
VL - 518-519
SP - 1
EP - 7
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -