Authors: Yuhong Guo
Publish Date: 2015/03/14
Volume: 22, Issue: 14, Pages: 10839-10849
Abstract
The organic carbon OC and elemental carbon EC collected by eightstage air samplers over northern China during spring 2012 were determined to characterize the spatial variations size distributions and sources of carbonaceous aerosols OC and EC had high concentration levels and spatial heterogeneity Higher carbonaceous aerosol loadings were found in urban areas and high concentrations of OC and EC were found in eastern parts of northern China including Beijing Taiyuan in Shanxi Province Yucheng in Shandong Province Xianghe in Hebei Province and Shenyang in Liaoning Province Except the Cele site OC and EC at all the sites showed a bimodal distribution peaking in the size of 04–07 and 47–58 μm Carbonaceous aerosols in the fine mode in the urban areas are mostly presented in smaller sizes than those in the rural/regional background areas For most sites mass median aerodynamic diameter MMAD values in the fine particles for OC were higher than those for EC with the addition of semivolatile organics Good correlations between OC and EC in all the cities 5 in North China and 1 in northeast China may suggest the impact of anthropogenic emissions on carbonaceous aerosols in the above regionsThis project was supported by the CAS Strategic Priority Research Program Grant XDA05100100 XDB05020200 and the National Natural Science Foundation of China 41222033 The author thanks members of the Chinese Ecosystem Research Network CERN and Dunhuang Weather Bureau Engineer Xiutian Ba SemiArid ClimateEnvironment Observatory of CAS at Tongyu Renjian Zhang Xianghe and Xinglong site Professor Pucai Wang for contributions to this research
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