Comparison of elemental and black carbon measurements during normal and heavy haze periods: implications for research
文献类型：期刊论文
| 作者 | Zhi, Guorui1; Chen, Yingjun2; Xue, Zhigang1; Meng, Fan1; Cai, Jing1,3; Sheng, Guoying3; Fu, Jiamo3 |
| 刊名 | ENVIRONMENTAL MONITORING AND ASSESSMENT
 |
| 出版日期 | 2014-10-01 |
| 卷号 | 186期号:10页码:6097-6106 |
| 关键词 | Elemental carbon Black carbon Heavy haze Enhanced absorption efficiency EC as indicator |
| ISSN号 | 0167-6369 |
| 产权排序 | [Zhi, Guorui; Xue, Zhigang; Meng, Fan; Cai, Jing] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China; [Chen, Yingjun] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol, Yantai 264003, Shandong, Peoples R China; [Cai, Jing; Sheng, Guoying; Fu, Jiamo] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China |
| 通讯作者 | Chen, YJ (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol, 17 Chunhui Rd, Yantai 264003, Shandong, Peoples R China. yjchen@yic.ac.cn |
| 中文摘要 | Studies specifically addressing the elemental carbon (EC)/black carbon (BC) relationship during the transition from clean-normal (CN) air quality to heavy haze (HH) are rare but have important health and climate implications. The present study, in which EC levels are measured using a thermal-optical method and BC levels are measured using an optical method (aethalometer), provides a preliminary insight into this issue. The average daily EC concentration was 3.08 +/- 1.10 mu g/m(3) during the CN stage but climbed to 11.77 +/- 2.01 mu g/m(3) during the HH stage. More importantly, the BC/EC ratio averaged 0.92 +/- 0.14 during the CN state and increased to 1.88 +/- 0.30 during the HH state. This significant increase in BC/EC ratio has been confirmed to result partially from an increase in the in situ light absorption efficiency (sigma (ap)) due to an enhanced internal mixing of the EC with other species. However, the exact enhancement of sigma (ap) was unavailable because our monitoring scheme could not acquire the in situ absorption (b (ap)) essential for sigma (ap) calculation. This reveals a need to perform simultaneous measurement of EC and b (ap) over a time period that includes both the CN and HH stages. In addition, the sensitivity of EC to both anthropogenic emissions and HH conditions implies a need to systematically study how to include EC complex (EC concentration, OC/EC ratio, and sigma (ap)) as an indicator in air quality observations, in alert systems that assess air quality, and in the governance of emissions and human behaviors. |
| 英文摘要 | Studies specifically addressing the elemental carbon (EC)/black carbon (BC) relationship during the transition from clean-normal (CN) air quality to heavy haze (HH) are rare but have important health and climate implications. The present study, in which EC levels are measured using a thermal-optical method and BC levels are measured using an optical method (aethalometer), provides a preliminary insight into this issue. The average daily EC concentration was 3.08 +/- 1.10 mu g/m(3) during the CN stage but climbed to 11.77 +/- 2.01 mu g/m(3) during the HH stage. More importantly, the BC/EC ratio averaged 0.92 +/- 0.14 during the CN state and increased to 1.88 +/- 0.30 during the HH state. This significant increase in BC/EC ratio has been confirmed to result partially from an increase in the in situ light absorption efficiency (sigma (ap)) due to an enhanced internal mixing of the EC with other species. However, the exact enhancement of sigma (ap) was unavailable because our monitoring scheme could not acquire the in situ absorption (b (ap)) essential for sigma (ap) calculation. This reveals a need to perform simultaneous measurement of EC and b (ap) over a time period that includes both the CN and HH stages. In addition, the sensitivity of EC to both anthropogenic emissions and HH conditions implies a need to systematically study how to include EC complex (EC concentration, OC/EC ratio, and sigma (ap)) as an indicator in air quality observations, in alert systems that assess air quality, and in the governance of emissions and human behaviors. |
| 学科主题 | Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | AEROSOL LIGHT-ABSORPTION ; SECONDARY ORGANIC AEROSOL ; THERMAL-OPTICAL METHODS ; CHEMICAL CHARACTERISTICS ; CLIMATE-CHANGE ; AIR-POLLUTION ; AETHALOMETER ; PARTICLES ; EC ; INSTRUMENT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000341497800011 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/8706]  |
| 专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 作者单位 | 1.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol, Yantai 264003, Shandong, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhi, Guorui,Chen, Yingjun,Xue, Zhigang,et al. Comparison of elemental and black carbon measurements during normal and heavy haze periods: implications for research[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2014,186(10):6097-6106. |
| APA | Zhi, Guorui.,Chen, Yingjun.,Xue, Zhigang.,Meng, Fan.,Cai, Jing.,...&Fu, Jiamo.(2014).Comparison of elemental and black carbon measurements during normal and heavy haze periods: implications for research.ENVIRONMENTAL MONITORING AND ASSESSMENT,186(10),6097-6106. |
| MLA | Zhi, Guorui,et al."Comparison of elemental and black carbon measurements during normal and heavy haze periods: implications for research".ENVIRONMENTAL MONITORING AND ASSESSMENT 186.10(2014):6097-6106. |
入库方式： OAI收割
来源：烟台海岸带研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。