Heavy dust fall in Beijing, on April 16-17, 2006: Geochemical properties and indications of the dust provenance

Feng, JIn; Zhu, Liping; Ju, Jian Ting; Li, Zhou; Zhen, Xiao Lin; Zhang, Wen; Gao, Shao Peng

doi:10.2343/geochemj.42.221

Cited by 34 publications

(34 citation statements)

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“…There might be some variations in the amount of Fe content depending on the size fraction (Cao et al, 2008;Wu et al, 2011) and on the source area (Formenti et al, 2011). Nonetheless, the average Fe content obtained by Ura et al (2011) is consistent with the values reported for bulk Asian dust events in Korea (3.7 % at Seoul, Choi et al, 2001;4.2-8.4 % at Seoul, Jeong, 2008) and in China (3.9-4.1 % at Beijing, Feng et al, 2008;3.0-5.7 % at Beijing, Lue et al, 2010). In our sample treatment, both wet and dry deposition samples were washed with ultrapure water.…”

Section: Observation Sites Experiments and Meteorological Datasupporting

confidence: 81%

Wet and dry deposition of mineral dust particles in Japan: factors related to temporal variation and spatial distribution

et al. 2014

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Abstract. Recent ground networks and satellite remotesensing observations have provided useful data related to spatial and vertical distributions of mineral dust particles in the atmosphere. However, measurements of temporal variations and spatial distributions of mineral dust deposition fluxes are limited in terms of their duration, location, and processes of deposition. To ascertain temporal variations and spatial distributions of mineral dust deposition using wet and dry processes, weekly deposition samples were obtained at Sapporo, Toyama, Nagoya, Tottori, Fukuoka, and Cape Hedo (Okinawa) in Japan during October 2008-December 2010 using automatic wet and dry separating samplers. Mineral dust weights in water-insoluble residue were estimated from Fe contents measured using an X-ray fluorescence analyser. Wet and dry deposition fluxes of mineral dusts were both high in spring and low in summer, showing similar seasonal variations to frequency of aeolian dust events (Kosa) in Japan. For wet deposition, highest and lowest annual dust fluxes were found at Toyama (9.6 g m −2 yr −1 ) and at Cape Hedo (1.7 g m −2 yr −1 ) as average values in 2009 and 2010. Higher wet deposition fluxes were observed at Toyama and Tottori, where frequent precipitation (> 60 % days per month) was observed during dusty seasons. For dry deposition among Toyama, Tottori, Fukuoka, and Cape Hedo, the highest and lowest annual dust fluxes were found respectively at Fukuoka (5.2 g m −2 yr −1 ) and at Cape Hedo (2.0 g m −2 yr −1 ) as average values in 2009 and 2010. The average ratio of wet and dry deposition fluxes was the highest at Toyama (3.3) and the lowest at Hedo (0.82), showing a larger contribution of the dry process at western sites, probably because of the distance from desert source regions and because of the effectiveness of the wet process in the dusty season.Size distributions of refractory dust particles were obtained using four-stage filtration: > 20, > 10, > 5, and > 1 µm diameter. Weight fractions of the sum of > 20 µ m and 10-20 µm (giant fraction) were higher than 50 % for most of the event samples. Irrespective of the deposition type, the giant dust fractions generally decreased with increasing distance from the source area, suggesting the selective depletion of larger giant particles during atmospheric transport. Based on temporal variations of PM c (2.5 < D < 10 µm), ground-based lidar, backward air trajectories, and vertical profiles of potential temperatures, transport processes of dust particles are discussed for events with high-deposition and low-deposition flux with high PM c . Low dry dust depositions with high PM c concentrations were observed under stronger (5 K km −1

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Section: Observation Sites Experiments and Meteorological Datasupporting

confidence: 81%

Wet and dry deposition of mineral dust particles in Japan: factors related to temporal variation and spatial distribution

et al. 2014

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“…Additionally, oxygen isotopic compositions within quartz from this dust fall vary with grain size and correlate with the variations in Nd isotopic composition, which supports the above idea of grain size separation by source area (Feng et al, 2008).…”

Section: Tracing Dust Provenancesupporting

confidence: 65%

“…These significant differences indicate that the potential source areas of LT-25, ZT-2 and WJ-1 differ from one another. Nakano et al (2004) and Feng et al (2008) also favored this conclusion.…”

Section: Tracing Dust Provenancementioning

confidence: 58%

“…We collected one contemporary dust sample (Sample No. WJ-1) from a heavy dust fall in Beijing, on April 16-17, 2006. Feng et al (2008 reported the grain size distributions and other principal properties of these samples.…”

Section: Methodsmentioning

confidence: 99%

“…Model ages for a single dust deposit, based on different size fractions, differ by as much as 150 Ma. The eolian samples studied in this work mainly consist of silt size particles (Feng et al, 2008). For other eolian deposits, the more the samples vary in grain size, the greater likelihood that their Nd model ages will vary within deposits from very similar provenance.…”

Section: Implication For Nd Model Agementioning

confidence: 99%

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Grain size effect on Sr and Nd isotopic compositions in eolian dust: Implications for tracing dust provenance and Nd model age

et al. 2009

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Strontium (Sr) and neodymium (Nd) isotopic compositions enable identification of dust sources and reconstruction of atmospheric dispersal pathways. The Sr and Nd isotopic compositions in eolian dust change systematically with grain size in ways not yet fully understood. This study demonstrates the grain size effect on the Sr and Nd isotopic compositions in loess and 2006 dust fall, based on analyses of seven separated grain size fractions. The analytical results indicate that Sr isotopic ratios strongly depend on the grain size fractions in samples from all types of eolian dust. In contrast, the Nd isotopic ratios exhibit little variation in loess, although they vary significantly with grain size in samples from a 2006 dust fall. Furthermore, Nd model ages tend to increase with increasing grain size in samples from all types of eolian dust. Comparatively, Sr isotopic compositions exhibit high sensitively to wind sorting, while Nd isotopic compositions show greater sensitively to dust origin. The principal cause for the different patterns of Sr and Nd isotopic composition variability with grain size appears related to the different geochemical behaviors between rubidium (Rb) and Sr, and the similar geochemical behaviors between samarium (Sm) and Nd. The Nd isotope data indicate that the various grain size fractions in loess have similar origins for each sample. In contrast, various provenance components may separate into different grain size fractions for the studied 2006 dust fall. The Sr and Nd isotope compositions further confirm that the 2006 dust fall and Pleistocene loess in Beijing have different sources. The loess deposits found in Beijing and those found on the Chinese Loess Plateau also derive from different sources. Variations between Sr and Nd isotopic compositions and Nd model ages with grain size need to be considered when directly comparing analyses of eolian dust of different grain size.

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Uranium, Thorium and Anthropogenic Radionuclides as Atmospheric Tracers

Hirose

2011

Advances in Isotope Geochemistry

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Heavy dust fall in Beijing, on April 16-17, 2006: Geochemical properties and indications of the dust provenance

Cited by 34 publications

References 50 publications

Wet and dry deposition of mineral dust particles in Japan: factors related to temporal variation and spatial distribution

Wet and dry deposition of mineral dust particles in Japan: factors related to temporal variation and spatial distribution

Grain size effect on Sr and Nd isotopic compositions in eolian dust: Implications for tracing dust provenance and Nd model age

Uranium, Thorium and Anthropogenic Radionuclides as Atmospheric Tracers

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