Comparison of EC and BC and evaluation of dust aerosol contribution to light absorption in Xi'an, China |
| |
Authors: | Li Yang Zhang Xiaoye Gong Sunling Che Huizheng Wang Dan Qu Wenjun Un Junying |
| |
Affiliation: | (1) SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, 10 Fenghui S. Rd., Xi'an, 710075, China;(2) Key Laboratory for Atmospheric Chemistry (LAC), Centre for Atmosphere Watch and Services (CAWAS), Chinese Academy of Meteorological Sciences (CAMS), CMA, Beijing, 10081, Chine;(3) Air Quality Research Branch, Meteorological Service of Canada, 4905 Dufferin Street, Toronto, Ontario, M3H 5T4, Canada;(4) Graduate School of the Chinese Academy of Sciences, Beijing, 100039, China |
| |
Abstract: | The concentrations of EC, BC and dust aerosols were determined for atmospheric samples collected from an observation station in Xi'an, China. The results show that the averaged correlation coefficient between EC and BC was founded to be 0.72 with 0.81 (n = 49) in autumn, 0.70 (n = 112) in winter and 0.69 (n = 57) in spring, respectively. Absorption coefficients of dust aerosol were estimated to be 2.7 m2 g−1 in autumn and 4.4 m2 g−1 in winter. The comparison of absorption coefficients of dust aerosol with those of BC implies that BC is the principal light-absorbing aerosol over Xi'an atmosphere. By combining thermal analysis of elemental carbon and dust contents in the aerosol samples, however, the fraction of dust absorption to total light absorption is estimated to be 19% in autumn and 31% in winter, respectively. |
| |
Keywords: | Elemental carbon Black carbon Dust aerosol Correlation Absorption coefficient |
本文献已被 PubMed SpringerLink 等数据库收录! |
|