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学科主题: 地理学::自然地理学
题名: The visible spectroscopy of iron oxide minerals in dust particles from ice cores on the Tibetan Plateau
作者: Wu, GJ (Wu, Guangjian)1, 2; Xu, TL (Xu, Tianli)1, 3; Zhang, XL (Zhang, Xuelei)4; Zhang, CL (Zhang, Chenglong)5; Yan, N (Yan, Ni)1, 3
通讯作者: Wu, GJ
刊名: TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
发表日期: 2016
DOI: 10.3402/tellusb.v68.29191
卷: 68, 期:0, 页:29191
收录类别: SCI
合作性质: 国内
文章类型: Article
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.
语种: 英语
WOS记录号: WOS:000371279100001
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7874
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun 130102, Peoples R China
5.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

Recommended Citation:
Wu, GJ ,Xu, TL ,Zhang, XL ,et al. The visible spectroscopy of iron oxide minerals in dust particles from ice cores on the Tibetan Plateau[J]. TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,2016,68(0):29191.
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