Black carbon aerosol characterization in a remote area of qinghai-tibetan plateau, western china | |
Fahey, DW (Fahey, D. W.)[ 3,4 ]; Shen, ZX (Shen, Zhenxing)[ 2 ]; Han, YM (Han, Yongming)[ 1 ]; Huang, RJ (Huang, R. -J.)[ 6,7 ]; Hu, TF (Hu, Tafeng)[ 1 ]; Gao, RS (Gao, Rushan)[ 3 ]; Cao, JJ (Cao, Junji)[ 1,5 ]; Schwarz, JP (Schwarz, J. P.)[ 3,4 ]; Wang, QY (Wang, Qiyuan)[ 1,2 ] | |
刊名 | Science of the Total Environment |
2014-05-01 | |
卷号 | 479-480期号:1页码:151-158 |
关键词 | Refractory Black Carbon Size Distribution Mixing State Tibetan Plateau |
DOI | 10.1016/j.scitotenv.2014.01.098 |
文献子类 | 期刊论文 |
英文摘要 | The concentrations, size distributions, and mixing states of refractory black carbon (rBC) aerosols were measured with a ground-based Single Particle Soot Photometer (SP2), and aerosol absorption was measured with an Aethalometer at Qinghai Lake (QHL), a rural area in the Northeastern Tibetan Plateau of China in October 2011. The area was not pristine, with an average rBC mass concentration of 0.36μgSTP-m-3 during the two-week campaign period. The rBC concentration peaked at night and reached the minimal in the afternoon. This diurnal cycle of concentration is negatively correlated with the mixed layer depth and ventilation. When air masses from the west of QHL were sampled in late afternoon to early evening, the average rBC concentration of 0.21μgSTP-m-3 was observed, representing the rBC level in a larger Tibetan Plateau region because of the highest mixed layer depth. A lognormal primary mode with mass median diameter (MMD) of ~175nm, and a small secondary lognormal mode with MMD of 470-500nm of rBC were observed. Relative reduction in the secondary mode during a snow event supports recent work that suggested size dependent removal of rBC by precipitation. About 50% of the observed rBC cores were identified as thickly coated by non-BC material. A comparison of the Aethalometer and SP2 measurements suggests that non-BC species significantly affect the Aethalometer measurements in this region. A scaling factor for the Aethalometer data at a wavelength of 880nm is therefore calculated based on the measurements, which may be used to correct other Aethalometer datasets collected in this region for a more accurate estimate of the rBC loading. The results present here significantly improve our understanding of the characteristics of rBC aerosol in the less studied Tibetan Plateau region and further highlight the size dependent removal of BC via precipitation. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.ieecas.cn/handle/361006/9803] |
专题 | 地球环境研究所_粉尘与环境研究室 |
通讯作者 | Cao, JJ (Cao, Junji)[ 1,5 ] |
作者单位 | 1.Centre for Climate and Air Pollution Studies, Ryan Institute, National University of Ireland Galway, University Road, Galway, Ireland 2.Key Laboratory of Aerosol Science & Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China; 3.Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 4.National Oceanic and Atmospheric Administration, Earth System Research Laboratory, NOAA, Boulder, CO, USA; 5.Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA; 6.Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China; 7.Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland; |
推荐引用方式 GB/T 7714 | Fahey, DW ,Shen, ZX ,Han, YM ,et al. Black carbon aerosol characterization in a remote area of qinghai-tibetan plateau, western china[J]. Science of the Total Environment,2014,479-480(1):151-158. |
APA | Fahey, DW .,Shen, ZX .,Han, YM .,Huang, RJ .,Hu, TF .,...&Wang, QY .(2014).Black carbon aerosol characterization in a remote area of qinghai-tibetan plateau, western china.Science of the Total Environment,479-480(1),151-158. |
MLA | Fahey, DW ,et al."Black carbon aerosol characterization in a remote area of qinghai-tibetan plateau, western china".Science of the Total Environment 479-480.1(2014):151-158. |
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