中国秸杆焚烧及民用燃煤棕色碳排放的初步研究

	中国秸杆焚烧及民用燃煤棕色碳排放的初步研究
其他题名	A Preliminary Study on Brown Carbon Emissions from Open Agricultural Biomass Burning and Residential Coal Combustion in China
	蔡竟; 支国瑞; 陈颖军; 孟凡; 薛志钢; 李剑; 方引
发表期刊	环境科学研究
ISSN	1001-6929
	2014
卷号	27 期号:5 页码:455-461
关键词	农业秸杆民用燃煤 Brc(棕色碳) 排放量估算
产权排序	南昌航空大学环境与化学工程学院; 中国环境科学研究院; 中国科学院烟台海岸带研究所
作者部门	中科院海岸带环境过程与生态修复重点实验室
英文摘要	近年来的研究表明,在BC(黑碳)和OC(有机碳)之间,还存在着一种有弱吸光能力的OC,因大多显棕黄色而被称为BrC (brown carbon,棕色碳). 广泛存在的秸杆焚烧和冬季大量民用燃煤的使用,使国内BrC 排放严重,但鲜见对其排放量的测算. 采用七波段黑碳仪(aethalometer)方法,对夏季小麦秸杆焚烧过程及冬季民用炉燃煤过程产生的烟气进行现场监测,根据BrC 与BC的光谱关联性差别,分化出R_(BrC/BC)(总光学衰减中BrC和BC的相对贡献). 结果表明: 麦秆焚烧和民用燃煤烟气的R_(BrC/BC)分别为1. 754 ± 0. 278和0. 183 ± 0. 142. 借助R_(BrC/BC)值,结合现有的BC 排放清单(2000年),初步推算出中国民用燃煤和秸杆田间焚烧 BrC的排放总量(以BC 当量计,下同)为(270. 6 ± 101. 6)Gg,接近同期BC 排放量的一半; 其中秸杆焚烧的BrC 排放量为(175. 4 ± 27. 8)Gg,约占二者总量的65%; 民用燃煤的BrC 排放量为(95. 2 ± 73. 7)Gg,约占35%. 该研究结果可为更全面的BrC 排放测算奠定基础,并为研究BrC的大气化学及辐射强迫提供依据.
中文摘要	Recent studies suggest that,between ordinary organic carbon (OC,non-light-absorbing)and black carbon (BC,strongly lightabsorbing)in atmospheric carbonaceous aerosols,there are some light-absorbing organic carbon aerosols collectively termed brown carbon (BrC). Although China has large BrC emissions from residential coal combustion and open agricultural biomass burning,there are little specific BrC emissions or testing data available. A 7-wavelength aethalometer was used to monitor the light-absorbing features of primary aerosols emissions from summertime open burning of wheat straw and from wintertime combustion of residential coal. Based on distinctions in the spectral dependence between BrC and BC (the ngstrom index is theoretically 1. 0 for BC and is greater than 1. 0 for BrC),the relative Shares of BrC and BC (B_(BrC/BC)ratio)were calculated. The results show that the value was 1. 754 0. 278 for wheat straw and 0. 183 0. 142 for residential coal. Based on the BrC/BC ratios obtained,preliminary estimates of China's BrC emissions from residential coal and open agricultural biomass burning in 2000 were calculated with the help of corresponding BC emissions reported in previous studies. The yearly sum of BrC emissions from residential coal and open agricultural biomass burning was 270. 6 101. 6 Gg (BC equivalent)in China,with (175. 4 27. 8)Gg or approximately 65% attributable to field agricultural biomass and (95. 2 73. 7)Gg or approximately 35%,to residential coal. These findings would establish a foundation for a more comprehensive measurement of BrC emissions in the future as well as studies of BrC in atmospheric chemistry and radiation forcing.
文章类型	期刊论文
资助机构	国家自然科学基金项目,国家环境保护公益性行业科研专项
收录类别	EI
语种	中文
CSCD记录号	CSCD:5148000
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/8418
专题	中国科学院海岸带环境过程与生态修复重点实验室
推荐引用方式 GB/T 7714	蔡竟,支国瑞,陈颖军,等. 中国秸杆焚烧及民用燃煤棕色碳排放的初步研究[J]. 环境科学研究,2014,27(5):455-461.
APA	蔡竟.,支国瑞.,陈颖军.,孟凡.,薛志钢.,...&方引.(2014).中国秸杆焚烧及民用燃煤棕色碳排放的初步研究.环境科学研究,27(5),455-461.
MLA	蔡竟,et al."中国秸杆焚烧及民用燃煤棕色碳排放的初步研究".环境科学研究 27.5(2014):455-461.

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