搜索结果: 1-15 共查到“大气化学 secondary organic aerosol”相关记录33条 . 查询时间(0.125 秒)
Evidence for a significant proportion of Secondary Organic Aerosol from isoprene above a maritime tropical forest
a significant proportion Secondary Organic Aerosol isoprene a maritime tropical forest
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2011/2/25
Isoprene is the most abundant non-methane biogenic volatile organic compound (BVOC), but the processes governing secondary organic aerosol (SOA) formation from isoprene oxidation are only beginning to...
Modeling secondary organic aerosol formation from isoprene oxidation under dry and humid conditions
secondary organic aerosol isoprene oxidation dry and humid conditions
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2011/2/24
A new model for the formation of secondary organic aerosol (SOA) from isoprene was developed. This model uses surrogate molecular species (hydroxy-hydroperoxides, tetrols, methylglyceric acid, organic...
Impact of aftertreatment devices on primary emissions and secondary organic aerosol formation potential from in-use diesel vehicles: results from smog chamber experiments
aftertreatment devices primary emissions secondary organic aerosol formation in-use diesel vehicles smog chamber experiments
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2010/12/28
Diesel particulate matter (DPM) is a significant source of aerosol in urban areas and has been linked to adverse health effects. Although newer European directives have introduced increasingly stringe...
Aqueous chemistry and its role in secondary organic aerosol (SOA) formation
Aqueous chemistry secondary organic aerosol (SOA) formation
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2010/11/30
This paper provides an overview of SOA formation through aqueous chemistry, including atmospheric evidence for this process and a review of radical and non-radical chemistry, using glyoxal as a model ...
Terpenylic acid and related compounds: precursors for dimers in secondary organic aerosol from the ozonolysis of α- and β-pinene
Terpenylic acid dimers secondary organic aerosol the ozonolysis of α- and β-pinene
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2010/10/11
In the present study, we have characterized the structure of a higher-molecular weight (MW) 358 α- and β-pinene dimeric secondary organic aerosol (SOA) product that received ample attention in previou...
Investigation of the correlation between odd oxygen and secondary organic aerosol in Mexico City and Houston
the correlation odd oxygen and secondary organic aerosol Mexico City Houston
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2010/10/11
Many recent models underpredict secondary organic aerosol (SOA) particulate matter (PM) concentrations in polluted regions, indicating serious deficiencies in the models' chemical mechanisms and/or mi...
Role of aldehyde chemistry and NOx concentrations in secondary organic aerosol formation
aldehyde chemistry NOx concentrations secondary organic aerosol formation
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2010/8/16
Aldehydes are an important class of products from atmospheric oxidation of hydrocarbons. Isoprene (2-methyl-1,3-butadiene), the most abundantly emitted atmospheric non-methane hydrocarbon, produces a ...
Chemical evolution of secondary organic aerosol from OH-initiated heterogeneous oxidation
Chemical evolution secondary organic aerosol OH-initiated heterogeneous oxidation
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2010/8/13
The heterogeneous oxidation of laboratory Secondary Organic Aerosol (SOA) particles by OH radicals was investigated. SOA particles, produced by reaction of α-pinene and O3, were exposed to OH radicals...
Temperature effect on physical and chemical properties of secondary organic aerosol from m-xylene photooxidation
Temperature effect physical and chemical properties secondary organic aerosol m-xylene photooxidation
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2010/8/12
The chemical and physical differences of secondary organic aerosol (SOA) formed at select isothermal temperatures (278 K, 300 K, and 313 K) are explored with respect to density, particle volatility, p...
Characterization of a large biogenic secondary organic aerosol event from eastern Canadian forests
a large biogenic secondary organic aerosol event eastern Canadian forests
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2010/8/12
Measurements of aerosol composition, volatile organic compounds, and CO are used to determine biogenic secondary organic aerosol (SOA) concentrations at a rural site 70 km north of Toronto. These biog...
Secondary organic aerosol production from modern diesel engine emissions
Secondary organic aerosol production modern diesel engine emissions
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2010/2/1
Secondary organic aerosol (SOA) production was observed at significant levels in a series of modern diesel exhaust (DE) aging experiments conducted at the European Outdoor Photoreactor/Simulation Cham...
Evaluation of recently-proposed secondary organic aerosol models for a case study in Mexico City
recently-proposed secondary organic aerosol models case study Mexico City
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2009/8/18
Recent field studies have found large discrepancies in the measured vs. modeled SOA mass loadings in both urban and regional polluted atmospheres. The reasons for these large differences are unclear. ...
The formation, properties and impact of secondary organic aerosol: current and emerging issues
secondary organic aerosol current issues emerging issues
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2009/8/7
Secondary organic aerosol (SOA) accounts for a significant fraction of ambient tropospheric aerosol and a detailed knowledge of the formation, properties and transformation of SOA is therefore require...
In-cloud processes of methacrolein under simulated conditions – Part 2: Formation of secondary organic aerosol
In-cloud processes simulated conditions secondary organic aerosol
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2009/8/7
The fate of methacrolein in cloud evapo-condensation cycles was experimentally investigated. To this end, aqueous-phase reactions of methacrolein with OH radicals were performed (as described in Liu e...
Towards closing the gap between hygroscopic growth and activation for secondary organic aerosol – Part 2: Theoretical approaches
hygroscopic growth secondary organic aerosol Theoretical approaches
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2009/6/22
We examine the hygroscopic properties of secondary organic aerosol particles generated through the reaction of α-pinene and ozone using a continuous flow reaction chamber. The water activity versus co...