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DOI	10.1080/02786826.2011.605815
	The Influence of Dust on Quantitative Measurements of Black Carbon in Ice and Snow when Using a Thermal Optical Method
	Wang, Mo; Xu, Baiqing; Zhao, Huabiao; Cao, Junji; Joswiak, Daniel; Wu, Guangjian; Lin, Shubiao
通讯作者	Wang, M (通讯作者)
发表日期	2012
ISSN	0278-6826
起始页码	60
结束页码	69
卷号	46 期号:1
英文摘要	Accurate measurements of black carbon concentrations in snow and ice are essential to quantify its impact on glacial melting and sequential climate forcing via snow albedo. However, snow and ice contain dust that may severely bias the precision of the elemental carbon (EC) and organic carbon (OC) measurements of filters with a thermal/optical method. To evaluate the effects of dust on black carbon analysis and to optimize filtration methods, meltwater from ice core and surface snow samples with variable dust content were filtered with different methods, including filtration of the entire material (including settling) and supernatant liquid, mechanical stirring and sonication, as well as utilization of single and double quartz filters. In this research, it is shown that dust can induce an extra decrease in optical reflectance during the 250 degrees C heating stage in the thermal/optical method and an improper OC and EC split. To address this problem, a correction procedure was suggested and used to revise the OC and EC results. The OC, EC, and TC concentration variations from different filtration methods along the ice core depth and along surface snow elevation were illustrated. These results indicate that black carbon and dust generally mix as agglomerates. The agglomerate structure will contribute to the underestimation of EC and OC in the measurement. However, carbonaceous matter can be efficiently detached from dust particles by ultrasonic agitation of the meltwater samples, which significantly improves carbon volatilization during the thermal/optical analysis.
关键词	AEROSOL SOOT REFLECTANCE ABSORPTION PLATEAU SAMPLES SYSTEM RECORD REGION
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Engineering, Chemical ; Engineering, Mechanical ; Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000297065700007
来源期刊	AEROSOL SCIENCE AND TECHNOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257972
推荐引用方式 GB/T 7714	Wang, Mo,Xu, Baiqing,Zhao, Huabiao,et al. The Influence of Dust on Quantitative Measurements of Black Carbon in Ice and Snow when Using a Thermal Optical Method[J]. 中国科学院青藏高原研究所,2012,46(1).
APA	Wang, Mo.,Xu, Baiqing.,Zhao, Huabiao.,Cao, Junji.,Joswiak, Daniel.,...&Lin, Shubiao.(2012).The Influence of Dust on Quantitative Measurements of Black Carbon in Ice and Snow when Using a Thermal Optical Method.AEROSOL SCIENCE AND TECHNOLOGY,46(1).
MLA	Wang, Mo,et al."The Influence of Dust on Quantitative Measurements of Black Carbon in Ice and Snow when Using a Thermal Optical Method".AEROSOL SCIENCE AND TECHNOLOGY 46.1(2012).