气候变化领域集成服务门户(CCPortal): Quantifying Light Absorption of Iron Oxides and Carbonaceous Aerosol in Seasonal Snow across Northern China

CCPortal

DOI	10.3390/atmos8040063
	Quantifying Light Absorption of Iron Oxides and Carbonaceous Aerosol in Seasonal Snow across Northern China
	Zhou, Yue; Wang, Xin; Wu, Xueqin; Cong, Zhiyuan; Wu, Guangming; Ji, Mingxia
通讯作者	Wang, X (通讯作者)
发表日期	2017
EISSN	2073-4433
卷号	8 期号:4
英文摘要	In this study, we attempted to quantify light absorption by insoluble light-absorbing particles (ILAPs) such as black carbon (BC), organic carbon (OC) and iron oxides in snow using an optical method directly and compared the results with those obtained using optical and chemical analysis methods cooperatively in previous studies. The mass absorption coefficients (MACs) and absorption Angstrom exponents (AAEs) of pure hematite, goethite and fullerene soot were also measured using an integrating sphere/integrating sandwich (ISSW) spectrophotometer in the laboratory. The results indicated that the MACs of pure hematite and goethite are 0.97 +/- 0.02 m(2).g(-1) and 0.43 +/- 0.01 m(2).g(-1) at 550 nm, and their AAEs are 5.53 +/- 0.47 and 2.18 +/- 0.16 from 550 nm to 750 nm, respectively. The MAC and AAE of fullerene soot are 6.40 +/- 0.42 m(2).g(-1) at 550 nm and 0.54 +/- 0.06 from 450 to 750 nm. By using the regionally average AAEs of non-BC components in snow, we evaluated the performance of a directly optical analysis, rather than combination of the optical and chemical methods, in quantifying the light absorption of BC, OC and Fe in snow samples. We found that the directly optical method used to measure the light absorption of BC and OC in Northern China snow has substantially low biases of 6.29% and 4.27% in median comparing to previous method. However, the high biases in estimating light absorption of Fe (33.01%) may be associated with the significant underestimation of the AAE of Fe.
关键词	BLACK-CARBON OPTICAL-PROPERTIES ORGANIC-CARBON BROWN CARBON MINERALOGICAL COMPOSITION ELEMENTAL CARBON ICE CORE DUST PARTICLES SOOT
英文关键词	insoluble light-absorbing particles; iron oxides; mass absorption coefficient; absorption Angstrom exponent
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000404058300001
来源期刊	ATMOSPHERE
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/258926
推荐引用方式 GB/T 7714	Zhou, Yue,Wang, Xin,Wu, Xueqin,et al. Quantifying Light Absorption of Iron Oxides and Carbonaceous Aerosol in Seasonal Snow across Northern China[J]. 中国科学院青藏高原研究所,2017,8(4).
APA	Zhou, Yue,Wang, Xin,Wu, Xueqin,Cong, Zhiyuan,Wu, Guangming,&Ji, Mingxia.(2017).Quantifying Light Absorption of Iron Oxides and Carbonaceous Aerosol in Seasonal Snow across Northern China.ATMOSPHERE,8(4).
MLA	Zhou, Yue,et al."Quantifying Light Absorption of Iron Oxides and Carbonaceous Aerosol in Seasonal Snow across Northern China".ATMOSPHERE 8.4(2017).