干旱区生态环境知识资源中心(Arid): Influence of sampling approaches on physical and geochemical analysis of aeolian dust in source regions

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DOI	10.1016/j.aeolia.2021.100684
	Influence of sampling approaches on physical and geochemical analysis of aeolian dust in source regions
	von Holdt, J. R. C.; Eckardt, F. D.; Baddock, M. C.; Hipondoka, M. H. T.; Wiggs, G. F. S.
通讯作者	von Holdt, JRC (corresponding author), Univ Cape Town, Dept Environm & Geog Sci, Private Bag X3, ZA-7701 Cape Town, South Africa.
来源期刊	AEOLIAN RESEARCH
ISSN	1875-9637
EISSN	2212-1684
出版年	2021
卷号	50
英文摘要	The characterisation of mineral dust at emission sources is essential for quantifying the wider-scale environmental impacts dust has, as well as improving its incorporation in modelling. Methods of sampling sediments at these source areas for the purposes of dust characterisation are varied and can produce different representations of emitted dust. This study systematically compared dust characterisations from three established approaches for estimating dust emission potential, namely: Big Spring Number Eight (BSNE) traps, a Portable In-situ Wind Erosion Laboratory (PI-SWERL) wind tunnel, and bulk surface sampling, at a known Namib Desert dust source. Individual particle analysis by auto-SEM (QEMSCAN) allowed comparison of size, shape, mineralogy and elemental composition at micrometre-scale for samples from the three approaches. BSNE samples consisted of a lower proportion of fine sediment (<20 ?m particle diameter) than PI-SWERL-derived samples, with this performance possibly influenced by atmospheric humidity. In comparison, PI-SWERL characterised the dust with relatively fewer particles between 63 and 100 ?m, a fraction that was more evident in both the BSNE-derived and surface sediments. The reduced representation of this coarser fraction resulted in appreciable differences in particle shape and mineralogic characteristics compared to BSNE and surface-derived samples. The different representations by the three methods return variable dust characteristics at source across fundamental properties of particle size, shape and mineralogy. Awareness of the different representations of dust caused by sampling technique remains essential for the appropriate physical and geochemical characterisation of aeolian dust and highlights how standardised techniques are important for meaningful comparisons, while methods to achieve accurate characterisation remain a priority for the discipline.
英文关键词	Mineral dust Sampling Auto-SEM PI-SWERL BSNE Individual particle analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000644940000002
WOS关键词	ATMOSPHERIC MINERAL DUST ; SIZE DISTRIBUTION ; RADIATIVE PROPERTIES ; MOJAVE DESERT ; MEASURE PM10 ; PI-SWERL ; PARTICLE ; AEROSOL ; DEPOSITION ; EMISSION
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
来源机构	University of Oxford
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349291
作者单位	[von Holdt, J. R. C.; Eckardt, F. D.] Univ Cape Town, Dept Environm & Geog Sci, Private Bag X3, ZA-7701 Cape Town, South Africa; [Baddock, M. C.] Loughborough Univ, Geog & Environm, Loughborough LE11 3TU, Leics, England; [Hipondoka, M. H. T.] Univ Namibia, Dept Geog Hist Environm Studies & Tourism Managem, 340 Mandume Ndemufayo Ave,Pionierspk, Windhoek, Namibia; [Wiggs, G. F. S.] Univ Oxford, Oxford Univ, Sch Geog & Environm, Ctr Environm, Oxford OX1 3QY, England
推荐引用方式 GB/T 7714	von Holdt, J. R. C.,Eckardt, F. D.,Baddock, M. C.,et al. Influence of sampling approaches on physical and geochemical analysis of aeolian dust in source regions[J]. University of Oxford,2021,50.
APA	von Holdt, J. R. C.,Eckardt, F. D.,Baddock, M. C.,Hipondoka, M. H. T.,&Wiggs, G. F. S..(2021).Influence of sampling approaches on physical and geochemical analysis of aeolian dust in source regions.AEOLIAN RESEARCH,50.
MLA	von Holdt, J. R. C.,et al."Influence of sampling approaches on physical and geochemical analysis of aeolian dust in source regions".AEOLIAN RESEARCH 50(2021).