A new generator for mineral dust aerosol production from soil samples in the laboratory: GAMEL

Lafon, S.; Alfaro, Stéphane C.; Chevaillier, Servanne; Rajot, Jean-Louis

doi:10.1016/j.aeolia.2014.04.004

Cited by 17 publications

(10 citation statements)

References 28 publications

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“…Moreover, Sun et al (2009) recorded only a small mass loss (lower than 0.2 %) for quartz, feldspar, calcite and hematite during ignition at 550 • C. Mass losses between 1 and 2.5 % for smectite, chlorite, illite and goethite and up to 18 % for kaolinite were observed (Sun et al, 2009). These au-thors showed that the structural water loss for 17 soil samples ranges from 0.56 to 2.45 % at 550 • C. This is consistent with the mass loss results obtained for the Douz soil which contains a significant proportion of quartz and calcite (Lafon et al, 2014). The larger mass loss observed for the Cape Verde soil can be partly due to its composition of quartz, potassic feldspars and an assemblage of illite-kaolinite-chlorite (Rognon et al, 1996;Desboeufs et al, 1999).…”

Section: Weighing and Ignition Protocolsupporting

confidence: 88%

An automatic collector to monitor insoluble atmospheric deposition: an application for mineral dust deposition

Bouchet¹,

Losno²,

Chevaillier³

et al. 2015

Preprint

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Abstract. Deposition is one of the key processes controlling the mass budget of the atmospheric mineral dust concentration. However, dust deposition remains poorly constrained in transport models simulating the atmospheric dust cycle. This is mainly due to the limited number of relevant deposition measurements. This paper aims at presenting an automatic collector (CARAGA), specially developed to sample the total (dry and wet) atmospheric deposition of insoluble dust in remote areas. The autonomy of the CARAGA can range from 25 days to almost 1 year depending on the programed sampling time step (1 day and 2 weeks sampling time steps, respectively). This collector is used to sample atmospheric deposition on Frioul Island which is located in the Gulf of Lions in the Western Mediterranean Basin over which Saharan dust can be transported and deposited. To quantify the mineral dust mass in deposition samples, a weighing and ignition protocol is applied. Two years of continuous deposition measurements performed on a weekly time step sampling on Frioul Island are presented and discussed with in-situ measurements, air mass trajectories and satellite observations of dust.

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Section: Weighing and Ignition Protocolsupporting

confidence: 88%

An automatic collector to monitor insoluble atmospheric deposition: an application for mineral dust deposition

Bouchet¹,

Losno²,

Chevaillier³

et al. 2015

Preprint

View full text Add to dashboard Cite

show abstract

“…Moreover, Sun et al (2009) recorded only a small mass loss (lower than 0.2 %) for quartz, feldspar, calcite and hematite during ignition at 550 • C. Mass losses between 1 and 2.5 % for smectite, chlorite, illite and goethite and up to 18 % for kaolinite were observed (Sun et al, 2009). These authors showed that the structural water loss for 17 soil samples ranges from 0.56 to 2.45 % at 550 • C. This is consistent with the mass loss results obtained for the Douz soil which contains a significant proportion of quartz and calcite (Lafon et al, 2014). The larger mass loss observed for the Cape Verde soil can be partly due to its composition of quartz, potassic feldspars and an assemblage of illite-kaolinite-chlorite (Rognon et al, 1996;Desboeufs et al, 1999).…”

Section: Weighing and Ignition Protocolsupporting

confidence: 79%

An automatic collector to monitor insoluble atmospheric deposition: application for mineral dust deposition

et al. 2015

View full text Add to dashboard Cite

Abstract. Deposition is one of the key terms of the mineral dust cycle. However, dust deposition remains poorly constrained in transport models simulating the atmospheric dust cycle. This is mainly due to the limited number of relevant deposition measurements. This paper aims to present an automatic collector (CARAGA), specially developed to sample the total (dry and wet) atmospheric deposition of insoluble dust in remote areas. The autonomy of the CARAGA can range from 25 days to almost 1 year depending on the programmed sampling frequency (from 1 day to 2 weeks respectively). This collector is used to sample atmospheric deposition of Saharan dust on the Frioul islands in the Gulf of Lions in the Western Mediterranean. To quantify the mineral dust mass in deposition samples, a weighing and ignition protocol is applied. Almost 2 years of continuous deposition measurements performed on a weekly sampling basis on Frioul Island are presented and discussed with air mass trajectories and satellite observations of dust. Insoluble mineral deposition measured on Frioul Island was 2.45 g m −2

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“…Thus, we selected h c = 6 × 10 −4 m. Assuming as Zhang and Shao said that the obstacles are spherical and that h c is equal to half their diameter, d c , leads to λ = 0.125. Thus, with these assumptions, the obstacles on the field in Banizoumbou should have an averaged diameter of about 1.2 × 10 −3 m, a reasonable estimate if we take into account the large dominance of coarse sand in the Banizoumbou soil (Lafon et al, ) and the low abundance of remaining crop residues.…”

Section: Resultsmentioning

confidence: 98%

Size‐Resolved Dry Deposition Velocities of Dust Particles: In Situ Measurements and Parameterizations Testing

et al. 2018

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Bulk and size-resolved particle concentrations were measured at 2.1 and 6.5 m above the soil surface during an intense dust deposition event that occurred in June 2006 in Niger. Bulk concentration measurements were performed using two tapered element oscillating microbalance instruments, and the size-resolved particle concentrations (from 0.3 to 20 μm) using two optical particle counters. The deposition fluxes derived from the bulk concentrations and those derived from the size-resolved ones are in very good agreement. The largest deposition fluxes are recorded when the dust concentrations are maximal. The temporal evolution of the dust deposition flux follows that of the dust concentration. This is not the case of the dry deposition velocities that are most of the time controlled by the wind friction velocity. The results also show that large particles are strongly sensible to rebound when the wind friction velocity is the highest. Size-resolved dry deposition velocities are compared with the rare measurements of dust deposition velocities over bare sandy soils and are confronted to existing parameterizations of the dry deposition velocity. The parameterization of Shao (2014, https://doi.org/10.5194/acp-14-12429-2014) appears to be the only one able to reproduce satisfyingly the measured dry deposition velocities on sandy soils in the 1-to 10-μm particle size range. Indeed, unlike others, this scheme considers the desert sandy surfaces as rough surfaces, allowing the interception of dust particles by the sand grains and/or by the small roughness elements present on the surface.

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A new generator for mineral dust aerosol production from soil samples in the laboratory: GAMEL

Cited by 17 publications

References 28 publications

An automatic collector to monitor insoluble atmospheric deposition: an application for mineral dust deposition

An automatic collector to monitor insoluble atmospheric deposition: an application for mineral dust deposition

An automatic collector to monitor insoluble atmospheric deposition: application for mineral dust deposition

Size‐Resolved Dry Deposition Velocities of Dust Particles: In Situ Measurements and Parameterizations Testing

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