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Griffin, Robert J.; Nguyen, Khanh Ngoc; Dabdub, Donald; Seinfeld, John H.

doi:10.1023/a:1022436813699

Cited by 104 publications

(47 citation statements)

References 36 publications

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“…However, this modeling study did not take into account interactions with inorganic aerosol. Aqueous-phase processing of glyoxal (which is formed from the oxidation of toluene and isoprene) was also found to be possibly a significant source of SOA as it can form oxalic acid via reaction in clouds (Griffin et al, 2003) and could form oligomers or form SOA in particles via reaction with the hydroxyl radical or from reactions catalyzed by ammonium (Knote et al, 2014) which could be important to take into account. Implementing a complete cloud chemical mechanism should be tested.…”

Section: Perspectives On Model Improvementmentioning

confidence: 99%

Development of an inorganic and organic aerosol model (CHIMERE 2017<i>β</i> v1.0): seasonal and spatial evaluation over Europe

et al. 2018

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Abstract. A new aerosol module was developed and integrated in the air quality model CHIMERE. Developments include the use of the Model of Emissions and Gases and Aerosols from Nature (MEGAN) 2.1 for biogenic emissions, the implementation of the inorganic thermodynamic model ISORROPIA 2.1, revision of wet deposition processes and of the algorithms of condensation/evaporation and coagulation and the implementation of the secondary organic aerosol (SOA) mechanism H 2 O and the thermodynamic model SOAP.Concentrations of particles over Europe were simulated by the model for the year 2013. Model concentrations were compared to the European Monitoring and Evaluation Programme (EMEP) observations and other observations available in the EBAS database to evaluate the performance of the model. Performances were determined for several components of particles (sea salt, sulfate, ammonium, nitrate, organic aerosol) with a seasonal and regional analysis of results.The model gives satisfactory performance in general. For sea salt, the model succeeds in reproducing the seasonal evolution of concentrations for western and central Europe. For sulfate, except for an overestimation of sulfate in northern Europe, modeled concentrations are close to observations and the model succeeds in reproducing the seasonal evolution of concentrations. For organic aerosol, the model reproduces with satisfactory results concentrations for stations with strong modeled biogenic SOA concentrations. However, the model strongly overestimates ammonium nitrate concentrations during late autumn (possibly due to problems in the temporal evolution of emissions) and strongly underestimates summer organic aerosol concentrations over most of the stations (especially in the northern half of Europe). This underestimation could be due to a lack of anthropogenic SOA or biogenic emissions in northern Europe.A list of recommended tests and developments to improve the model is also given.

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Section: Perspectives On Model Improvementmentioning

confidence: 99%

Development of an inorganic and organic aerosol model (CHIMERE 2017<i>β</i> v1.0): seasonal and spatial evaluation over Europe

et al. 2018

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“…The concentration of biogenic compounds was observed to be approximately twice that for the anthropogenic VOCs , thus while only one lumped reaction was implemented for the anthropogenic VOCs, the reaction of biogenics with both OH and ozone was included (see Table 2). It is acknowledged that this approach neglects factors such as the relationship with condensed mass (Griffin et al, 2003), but it is applied here to broadly represent the potential for the production of oxidation products with low volatility that might partition into the particle phase.…”

Section: Uhma Modelmentioning

confidence: 99%

Evidence of an elevated source of nucleation based on model simulations and data from the NIFTy experiment

et al. 2012

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Abstract. New particle formation has been observed at a number of ground-based measurement sites. Prior research has provided evidence that this new particle formation, while observed in the near-surface layer, is actually occurring in atmospheric layers above the surface and appears to be focused in or close to the residual layer formed by the nocturnal inversion. Here, we present both observations and modeling for southern Indiana which support this postulate. Based on simulations with a detailed aerosol dynamics model and the Weather Research and Forecasting model, along with data from ground-based remote sensing instruments and detailed gas and particle phase measurements, we show evidence that (i) the maximum rate change of ultrafine particle concentrations as observed close to the surface is always preceded by breakdown of the nocturnal inversion and enhancement of vertical mixing and (ii) simulated particle size distributions exhibit greatest accord with surface observations during and subsequent to nucleation only when initialized with a particle size distribution representative of clear atmospheric conditions, rather than the in situ (ground-level) particle size distribution.

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“…Another approach is the volatility basis set [Donahue et al, 2006], which treats the chemical evolution of an aggregate distribution of semi-volatile material according to their volatilities. Finally, the molecular approach [Pun et al, 2002[Pun et al, , 2006Griffin et al, 2003;Tulet et al, 2006] associates experimental data with several molecular structures, which are surrogates of a large number of SOA species, to extrapolate SOA formation from smog chambers to the atmosphere. In the molecular approach, several processes, which are often not taken into account in the other approaches can be readily estimated (e.g., absorption into an aqueous phase, oligomerization, hygroscopicity, non-ideality) and treated explicitly in the model.…”

Section: Introductionmentioning

confidence: 99%

A hydrophilic/hydrophobic organic (H²O) aerosol model: Development, evaluation and sensitivity analysis

Couvidat¹,

Debry²,

Sartelet³

et al. 2012

J. Geophys. Res.

105

181

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A secondary organic aerosol (SOA) model, the Hydrophilic/Hydrophobic Organic model (H2O), is presented and evaluated over Europe. H2O uses surrogate organic molecules to represent the myriad of SOA species and distinguishes two kinds of surrogate species: hydrophilic species (which condense preferentially into an aqueous phase) and hydrophobic species (which condense only into an organic phase). These surrogate species are formed from the oxidation in the atmosphere of volatile organic compounds. H2O includes several important processes, including the effect of nitrogen oxides (NOX) on SOA formation, the dissociation of organic acids in an aqueous phase, the oligomerization of aldehydes, the non‐ideality of the particle phase and the hygroscopicity of organics. Concentrations of organic aerosols were simulated over Europe from July 2002 to July 2003 for comparison with measurements of the European Monitoring Evaluation Program (EMEP). In H2O, primary organic aerosols (POA) are considered as semi‐volatile organic compounds (SVOC) present in both the gas phase and the particle phase. Taking into account the gas‐phase fraction of SVOC increases significantly organic PM concentrations, particularly in winter, in better agreement with observations. The impacts on organic aerosol formation of ideality, of the choice of the parameterization for isoprene SOA formation, and of the OM/OC ratio of the model were also investigated. Assuming ideality in H2O was found to lead to a small decrease in OM. Compared to a two‐product parameterization, the parameterization of Couvidat and Seigneur [2011] for SOA formation from isoprene oxidation leads to a significant increase in isoprene SOA by taking into account their hydrophilic properties and suggests that most models may currently underestimate isoprene SOA.

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Untitled

Cited by 104 publications

References 36 publications

Development of an inorganic and organic aerosol model (CHIMERE 2017<i>β</i> v1.0): seasonal and spatial evaluation over Europe

Development of an inorganic and organic aerosol model (CHIMERE 2017<i>β</i> v1.0): seasonal and spatial evaluation over Europe

Evidence of an elevated source of nucleation based on model simulations and data from the NIFTy experiment

A hydrophilic/hydrophobic organic (H²O) aerosol model: Development, evaluation and sensitivity analysis

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Untitled

Cited by 104 publications

References 36 publications

Development of an inorganic and organic aerosol model (CHIMERE 2017&lt;i&gt;β&lt;/i&gt; v1.0): seasonal and spatial evaluation over Europe

Development of an inorganic and organic aerosol model (CHIMERE 2017&lt;i&gt;β&lt;/i&gt; v1.0): seasonal and spatial evaluation over Europe

Evidence of an elevated source of nucleation based on model simulations and data from the NIFTy experiment

A hydrophilic/hydrophobic organic (H2O) aerosol model: Development, evaluation and sensitivity analysis

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Development of an inorganic and organic aerosol model (CHIMERE 2017<i>β</i> v1.0): seasonal and spatial evaluation over Europe

Development of an inorganic and organic aerosol model (CHIMERE 2017<i>β</i> v1.0): seasonal and spatial evaluation over Europe

A hydrophilic/hydrophobic organic (H²O) aerosol model: Development, evaluation and sensitivity analysis