Influence de la teneur en particules de l'atmosphere sur l'efficacite de piegeage des aerosols relation between particulate concentration in the atmosphere and aerosol collection efficiency

Bergametti, Gilles; Sage, R. Vie Le; Grubis, B.; Dulieu, B.; Elichegaray, C.

doi:10.1080/09593338209384131

Cited by 15 publications

(2 citation statements)

References 2 publications

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“…[17] During the KEFREN campaign, size segregated aerosol were also sampled using a EGA 80 cascade impactor with Nuclepore ® PC filters (47 mm in diameter, 0.2 mm porosity). This custom made impactor has 6 stages including a terminal filter and was operated at low flow rate ($1 m 3 h À1 ) [Bergametti et al, 1982]. Its entrance was 1.5 m high above ground and oriented downward.…”

Section: Laboratory Analyses and Determination Of Total Atmospheric Dmentioning

confidence: 99%

Direct measurements of atmospheric iron, cobalt, and aluminum‐derived dust deposition at Kerguelen Islands

Heimburger

Losno

Triquet

et al. 2012

Global Biogeochemical Cycles

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[1] Atmospheric deposition is one of the major sources of nutrients bringing trace metals to remote marine biota. In this study, total atmospheric deposition and crustal aerosol concentrations were monitored at Kerguelen Islands (49 18′S; 70 07′E) in the Southern Ocean during a short campaign in early 2005 and then continuously for about 2 years (2009)(2010). Results show very low levels of atmospheric dust and trace metals concentrations but higher deposition fluxes than expected. The averaged total dust deposition flux as derived from Al deposition measurements is 659 mg m À2 d À1 . Simultaneously measured Fe and Co deposition fluxes are respectively 29 mg m À2 d À1 (520 nmol m À2 d À1 ) and 0.014 mg m À2 d À1 (0.24 nmol m À2 d À1 ), giving typically crustal elemental ratios to Al of 0.54 and 2.6 10 À4 . Measured dust deposition is in relatively good agreement with those simulated by current atmospheric models, but suggest that previous indirect calculations from field experiments are too low by a factor of 20. Observations and model results show that dust is transported above the marine atmospheric boundary layer to Kerguelen Islands, and thus that surface concentrations are not representative of the total dust column. Indeed, using surface concentrations leads to very large computed wet scavenging ratios, and to the conclusion that it is not appropriate to derive deposition fluxes from surface concentrations at remote ocean sites.

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Section: Laboratory Analyses and Determination Of Total Atmospheric Dmentioning

confidence: 99%

Direct measurements of atmospheric iron, cobalt, and aluminum‐derived dust deposition at Kerguelen Islands

Heimburger

Losno

Triquet

et al. 2012

Global Biogeochemical Cycles

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“…The mass-size distribution of the noncarbonaceous aerosol species was retrieved by using cascade impactor sampling. We used an EGAI 80 low-volume cascade impactor [Bergametti et al, 1982]…”

Section: Aerosol Size Distributionsmentioning

confidence: 99%

Contribution of the different aerosol species to the aerosol mass load and optical depth over the northeastern tropical Atlantic

Chiapello¹,

Bergametti²,

Chatenet³

et al. 1999

J. Geophys. Res.

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Abstract. Simultaneous ground-based measurements of chemical composition, size distribution, and column optical thickness at 670 nm of atmospheric aerosols have been performed at Sal Island (Cape Verde) during the winter season when African dust is transported in the lower troposphere. Mineral dust and, occasionally, sea salt dominate the aerosol mass load, whereas the excess sulfates plus the carbonaceous aerosol (particulate organic matter and black carbon) contributions to the mass load remain lower than 5% on average. We compute the total aerosol optical depth (AOD) by combining optical properties derived from measured size distributions and vertical concentration profile of each aerosol type estimated from surface elemental concentrations and meteorological observations. Results are very consistent with direct Sun photometer measurements. This allows us to derive the chemical apportionment of AOD in this region: mineral dust from Africa controls the total AOD and generally dominates AOD even in the absence of dust outbreak; on average, sea salt, excess sulfate, and carbonaceous aerosols all together only contribute to an averaged background AOD of 0.04 at 670 nm.

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Local, Proximal and Distal Saharan Dusts: Characterization and Contribution to the Sedimentation

Coudé-Gaussen¹

1989

Paleoclimatology and Paleometeorology: Modern and Past Patterns of Global Atmospheric Transport

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Influence de la teneur en particules de l'atmosphere sur l'efficacite de piegeage des aerosols relation between particulate concentration in the atmosphere and aerosol collection efficiency

Cited by 15 publications

References 2 publications

Direct measurements of atmospheric iron, cobalt, and aluminum‐derived dust deposition at Kerguelen Islands

Direct measurements of atmospheric iron, cobalt, and aluminum‐derived dust deposition at Kerguelen Islands

Contribution of the different aerosol species to the aerosol mass load and optical depth over the northeastern tropical Atlantic

Local, Proximal and Distal Saharan Dusts: Characterization and Contribution to the Sedimentation

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