PittsburghV1, Main, Exploration, bibRecord, 004F60

Secondary Production of Organic Aerosols from Biogenic VOCs over Mt. Fuji, Japan

Identifieur interne : 004F60 ( Main/Exploration ); précédent : 004F59; suivant : 004F61

Secondary Production of Organic Aerosols from Biogenic VOCs over Mt. Fuji, Japan

Auteurs : PINGQING FU [Japon, République populaire de Chine] ; Kimitaka Kawamura [Japon] ; JING CHEN [République populaire de Chine] ; Yuzo Miyazaki [Japon]

Source :

Environmental science & technology [ 0013-936X ] ; 2014.

RBID : Pascal:15-0033669

Descripteurs français

Pascal (Inist)
- Pollution air, Aérosol, Polluant secondaire, Précurseur, Composé organique volatil, Facteur biogène, Variation diurne, Variation nocturne, Honshu, Pollution origine naturelle, Volcan Fujiyama.
Wicri :
- topic : Aérosol.

English descriptors

KwdEn :
- Aerosols, Air pollution, Biogenic factor, Diurnal variation, Honshu, Natural origin pollution, Nocturnal variation, Precursor, Secondary pollutant, Volatile organic compound.

Abstract

We investigated organic molecular compositions of summertime aerosols collected at the summit of Mt Fuji (3776 m a.s.l.) in July-August 2009. More than 120 organic species were identified using GC/MS. Concentrations of both primary and secondary organic aerosol (SOA) tracers in whole-day samples were 4-20 times higher than those in nighttime samples, suggesting that valley breeze is an efficient mechanism to uplift the aerosols and precursors from the ground surface to mountaintop in daytime. Using a tracer-based method, we estimated the concentrations of secondary organic carbon (SOC) derived from isoprene, a/β-pinene, and β-caryophyllene to be 2.2-51.2 ngC m^-3 in nighttime and 227-1120 ngC m^-3 during whole-day. These biogenic SOCs correspond to 0.80-31.9% and 26.8-57.4% of aerosol organic carbon in nighttime and whole-day samples, respectively. This study demonstrates that biogenic SOA, which is controlled by the valley breeze, is a significant fraction of free tropospheric aerosols over Mt. Fuji in summer.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<front><div type="abstract" xml:lang="en">We investigated organic molecular compositions of summertime aerosols collected at the summit of Mt Fuji (3776 m a.s.l.) in July-August 2009. More than 120 organic species were identified using GC/MS. Concentrations of both primary and secondary organic aerosol (SOA) tracers in whole-day samples were 4-20 times higher than those in nighttime samples, suggesting that valley breeze is an efficient mechanism to uplift the aerosols and precursors from the ground surface to mountaintop in daytime. Using a tracer-based method, we estimated the concentrations of secondary organic carbon (SOC) derived from isoprene, a/β-pinene, and β-caryophyllene to be 2.2-51.2 ngC m<sup>-3</sup>
 in nighttime and 227-1120 ngC m<sup>-3</sup>
 during whole-day. These biogenic SOCs correspond to 0.80-31.9% and 26.8-57.4% of aerosol organic carbon in nighttime and whole-day samples, respectively. This study demonstrates that biogenic SOA, which is controlled by the valley breeze, is a significant fraction of free tropospheric aerosols over Mt. Fuji in summer.</div>
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Secondary Production of Organic Aerosols from Biogenic VOCs over Mt. Fuji, Japan

Secondary Production of Organic Aerosols from Biogenic VOCs over Mt. Fuji, Japan

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri