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DOI	10.3402/tellusb.v68.29191
	The visible spectroscopy of iron oxide minerals in dust particles from ice cores on the Tibetan Plateau
	Wu, Guangjian; Xu, Tianli; Zhang, Xuelei; Zhang, Chenglong; Yan, Ni
通讯作者	Wu, GJ (通讯作者)
发表日期	2016
ISSN	1600-0889
卷号	68
英文摘要	Goethite (Gt) and hematite (Hm) are the most abundant forms of iron oxides in dust and the major light absorbers in the shortwave spectrum in air and snow. Diffuse reflectance spectrometry was performed to investigate the reflectance spectra of goethite and hematite in dust particles from ice cores, aerosol samples and glacier cryoconite on the northern and central Tibetan Plateau. The results showed that two peaks in the first derivative value of the spectra at 430 and 560 nm were determined to be goethite and hematite, respectively. The high iron content samples have a higher first derivative value, and prominent and much more distinct peaks for Hm and Gt. We propose that the strength of the Hm and Gt peaks may probe the iron content, and then in our samples hematite has a stronger correlation than goethite. However, when the iron content reaches a threshold, the iron oxides have little or no impact on the reflectance spectra. The fine fraction of glacier dust has a greater abundance of iron, and the first derivative values of hematite are higher than goethite, indicating that hematite might be concentrated in the fine fraction. The distinguishable differences in the Hm/Gt ratio among these ice core samples and other aerosol data indicate the regional to continental difference in composition, which can be used to simplify the iron oxides in snow radiation models.
关键词	AEROSOL-PARTICLES BLACK CARBON DESERT DUST SNOW HEMATITE RANGE OCEAN
英文关键词	ice core dust; diffuse reflectance spectroscopy; hematite; goethite; Tibetan Plateau
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000371279100001
来源期刊	TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
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/258745
推荐引用方式 GB/T 7714	Wu, Guangjian,Xu, Tianli,Zhang, Xuelei,et al. The visible spectroscopy of iron oxide minerals in dust particles from ice cores on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,68.
APA	Wu, Guangjian,Xu, Tianli,Zhang, Xuelei,Zhang, Chenglong,&Yan, Ni.(2016).The visible spectroscopy of iron oxide minerals in dust particles from ice cores on the Tibetan Plateau.TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,68.
MLA	Wu, Guangjian,et al."The visible spectroscopy of iron oxide minerals in dust particles from ice cores on the Tibetan Plateau".TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY 68(2016).