干旱区生态环境知识资源中心(Arid): Optical, Geochemical and Mineralogical Characteristics of Light-Absorbing Impurities Deposited on Djankuat Glacier in the Caucasus Mountains

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DOI	10.3390/w13212993
	Optical, Geochemical and Mineralogical Characteristics of Light-Absorbing Impurities Deposited on Djankuat Glacier in the Caucasus Mountains
	Kutuzov, Stanislav; Shahgedanova, Maria; Krupskaya, Viktoria; Goryachkin, Sergey
通讯作者	Kutuzov, S (corresponding author), Russian Acad Sci, Inst Geog, Moscow 119017, Russia. ; Kutuzov, S (corresponding author), Natl Res Univ Higher Sch Econ, Fac Geog & Geoinformat Technol, Moscow 101000, Russia.
来源期刊	WATER
EISSN	2073-4441
出版年	2021
卷号	13 期号:21
英文摘要	Supra-glacial material, including light-absorbing impurities (LAI) such as mineral dust of crustal and soil origin, black carbon, algae and cryoconite, reduce the reflectance of snow and glacier ice. The reduction depends on the amount of LAI and their physical and chemical properties, which vary spatially and temporally. Spectral reflectance data and snow and ice samples, containing LAI, were collected in the ablation zone of the Djankuat Glacier, Central Caucasus, Russia. The spectra of the samples containing mineral dust transported from deserts were characterized by negative visible near-infrared gradients and were different from the spectra of clean aged snow and exposed glacier ice and from the samples containing mineral dust produced locally. Geochemical and mineralogical analysis using X-ray diffraction and X-ray fluorescence spectrometry showed that samples containing desert dust were characterised by a high proportion of clay materials and such minerals as smectites, illite-smectites and palygorskite and by a smaller size of mineral particles. They were enriched in chromium, zinc and vanadium. The latter served as an indicator of dust transport over or origin from the oil-producing regions of the Middle East. There was a strong negative correlation between the amount of organic matter and mineral dust in the collected samples and the albedo of surfaces from which the samples were collected. The results suggested that organic matter reduced albedo more efficiently than mineral dust. The study highlighted the importance of supra-glacial material in changing the surface reflectivity of snow and glaciers in the Caucasus region.
英文关键词	light-absorbing impurities mineral dust spectral reflectance albedo glaciers Caucasus
类型	Article
语种	英语
开放获取类型	Green Accepted, gold
收录类别	SCI-E
WOS记录号	WOS:000718486400001
WOS关键词	SAHARAN DUST EVENTS ; BLACK-CARBON ; SPATIAL VARIATIONS ; MASS-BALANCE ; MT. ELBRUS ; SNOW ALGAE ; ICE ALBEDO ; IMPACT ; RUSSIA ; REFLECTANCE
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368198
作者单位	[Kutuzov, Stanislav; Goryachkin, Sergey] Russian Acad Sci, Inst Geog, Moscow 119017, Russia; [Kutuzov, Stanislav] Natl Res Univ Higher Sch Econ, Fac Geog & Geoinformat Technol, Moscow 101000, Russia; [Shahgedanova, Maria] Univ Reading, Dept Geog & Environm Sci, Whiteknights RG6 6AB, England; [Krupskaya, Viktoria] Russian Acad Sci, Inst Geol Ore Deposits Petr Mineral & Geochem, Moscow 119017, Russia
推荐引用方式 GB/T 7714	Kutuzov, Stanislav,Shahgedanova, Maria,Krupskaya, Viktoria,et al. Optical, Geochemical and Mineralogical Characteristics of Light-Absorbing Impurities Deposited on Djankuat Glacier in the Caucasus Mountains[J],2021,13(21).
APA	Kutuzov, Stanislav,Shahgedanova, Maria,Krupskaya, Viktoria,&Goryachkin, Sergey.(2021).Optical, Geochemical and Mineralogical Characteristics of Light-Absorbing Impurities Deposited on Djankuat Glacier in the Caucasus Mountains.WATER,13(21).
MLA	Kutuzov, Stanislav,et al."Optical, Geochemical and Mineralogical Characteristics of Light-Absorbing Impurities Deposited on Djankuat Glacier in the Caucasus Mountains".WATER 13.21(2021).