100 Years of Progress in Gas-Phase Atmospheric Chemistry Research

Wallington, T. J.; Seinfeld, John H.; Barker, John R.

doi:10.1175/amsmonographs-d-18-0008.1

Cited by 14 publications

(7 citation statements)

References 347 publications

(330 reference statements)

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“…An effective saturation concentration ( C *) of 3-MBTCA in the model estimation was 10 –3 μg m –3 (equivalent to 1.21 × 10 –8 Pa). The measured fraction corresponds to P sat 0 in the range of 4.2 × 10 –5 to 4.2 × 10 –6 Pa . It is worth noting that it is comparable to the experimental values of this study and Leinhard et al Our experimental data could be usefully applied to improve the prediction method of vapor pressure and SOA formation.…”

Section: Resultssupporting

confidence: 89%

Exploring Volatility Properties of Discrete Secondary Organic Aerosol Constituents of α-Pinene and Polycyclic Aromatic Hydrocarbons

Babar

Ashraf

Park

et al. 2020

ACS Earth Space Chem.

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Limited experimental data are available on the volatility parameters of saturation vapor pressure, vaporization enthalpy, and melting temperature of secondary organic aerosol (SOA) constituents. In this study, we aimed to determine the volatility of individual components of typical biogenic and anthropogenic SOA. The volatility profiles of four synthesized and two commercial SOA constituents were generated using a thermal denuder coupled with a scanning particle sizer. For the volatility measurement, four constituents of α-pinene SOA were synthesized in the laboratory because of the lack of commercial reagents. For each of the SOA species, a volatility profile was measured by changing the thermal denuder temperature below its melting point measured using thermal gravimetric analysis and differential scanning calorimetry. Saturation pressure (P sat 0) and vaporization enthalpy (ΔH v) at 25 °C of the SOA constituents were determined by applying the integrated volume method to the measured volatility profiles. The determined P sat 0 values of 3-methylbutane-1,2,3-tricarboxylic acid (3-MBTCA), terpenylic acid, diaterpenylic acid acetate (DTAA), sodium-(1R,2R,3S,5R)-2-hydroxy-2,6,6-trimethylbicyclo[3.1.1]heptan-3-yl sulfate (Na-2-OH-2,6,6-TMBHS), 1,2,4,5-benzenetetracarboxylic acid (1,2,4,5-B4CA), and 1,2,4-benzenetricarboxylic acid (1,2,4-B3CA) were 3.4 ± 0.6 × 10–5, 1.7 ± 0.3 × 10–4, 1.8 ± 0.2 × 10–5, 3.4 ± 0.4 × 10–5, 7.7 ± 0.7 × 10–5, and 2.1 ± 0.3 × 10–6 Pa, respectively. The estimated values of ΔH v for 3-MBTCA, terpenylic acid, DTAA, Na-2-OH-2,6,6-TMBHS, 1,2,4,5-B4CA, and 1,2,4-B3CA were 128.4 ± 4.7, 88.4 ± 3.5 135.4 ± 3.7, 38.4 ± 1.7, 42.8 ± 2.1, and 108.1 ± 4.1 kJ mol–1, respectively. These data will improve the knowledge of the formation and fate of SOA.

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Section: Resultssupporting

confidence: 89%

Exploring Volatility Properties of Discrete Secondary Organic Aerosol Constituents of α-Pinene and Polycyclic Aromatic Hydrocarbons

Babar

Ashraf

Park

et al. 2020

ACS Earth Space Chem.

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“…The history of tropospheric ozone research has been reviewed in detail recently (Staehelin et al, 2017;Wallington et al, 2019), and here, we provide a brief overview. The Art.…”

Section: A Brief History Of Tropospheric Ozone Researchmentioning

confidence: 99%

Tropospheric Ozone Assessment Report

Archibald

Neu

Elshorbany

et al. 2020

Elementa: Science of the Anthropocene

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Our understanding of the processes that control the burden and budget of tropospheric ozone has changed dramatically over the last 60 years. Models are the key tools used to understand these changes, and these underscore that there are many processes important in controlling the tropospheric ozone budget. In this critical review, we assess our evolving understanding of these processes, both physical and chemical. We review model simulations from the International Global Atmospheric Chemistry Atmospheric Chemistry and Climate Model Intercomparison Project and Chemistry Climate Modelling Initiative to assess the changes in the tropospheric ozone burden and its budget from 1850 to 2010. Analysis of these data indicates that there has been significant growth in the ozone burden from 1850 to 2000 (approximately 43 ± 9%) but smaller growth between 1960 and 2000 (approximately 16 ± 10%) and that the models simulate burdens of ozone well within recent satellite estimates. The Chemistry Climate Modelling Initiative model ozone budgets indicate that the net chemical production of ozone in the troposphere plateaued in the 1990s and has not changed since then inspite of increases in the burden. There has been a shift in net ozone production in the troposphere being greatest in the northern mid and high latitudes to the northern tropics, driven by the regional evolution of precursor emissions. An analysis of the evolution of tropospheric ozone through the 21st century, as simulated by Climate Model Intercomparison Project Phase 5 models, reveals a large source of uncertainty associated with models themselves (i.e., in the way that they simulate the chemical and physical processes that control tropospheric ozone). This structural uncertainty is greatest in the near term (two to three decades), but emissions scenarios dominate uncertainty in the longer term (2050–2100) evolution of tropospheric ozone. This intrinsic model uncertainty prevents robust predictions of near-term changes in the tropospheric ozone burden, and we review how progress can be made to reduce this limitation.

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“…Other reactive nitrogen emissions include biomass burning (~5 Tg N/yr), biogenic soil processes (~18 Tg N/yr) and lighting (up to 5 Tg N/yr) (Fowler et al 2013). Emissions of nitrogen oxides (NOx = NO + NO2) are of interest as they are important drivers of atmospheric chemistry since tropospheric ozone production is controlled by their availability (Fang et al 2011;Wallington et al 2019). Nitric acid (HNO3) or nitrate (NO3 -) are the major sink of NOx and major contributors to the atmospheric acidity, placing second after sulfuric acid (H2SO4).…”

Section: Introductionmentioning

confidence: 99%

Stable Isotopic Characterization of Nitrate Wet Deposition in the Tropical Urban Atmosphere of Costa Rica

Villalobos-Forbes

Esquivel‐Hernández

Sánchez‐Murillo

et al. 2021

Preprint

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Increasing energy consumption and food production worldwide results in anthropogenic emissions of reactive nitrogen into the atmosphere. To date, however, little information is available on tropical urban environments where inorganic nitrogen is vastly transported and deposited through precipitation on terrestrial and aquatic ecosystems. To fill this gap, we present compositions of water stable isotopes in precipitation and atmospheric nitrate (δ18O-H2O, δ2H-H2O, δ15N-NO3-, and δ18O-NO3-) collected daily between August 2018 and November 2019 in a tropical urban atmosphere of central Costa Rica. Rainfall generation processes (convective and stratiform) were identified using stable isotopes in precipitation combined with air mass back trajectory analysis. A Bayesian isotope mixing model forced with δ15N-NO3- values corrected for potential 15N fractionation effects reveal the predominant contribution of biomass burning and lightning to nitrate wet deposition. δ18O-NO3- values in Caribbean convective rainfall reflect the oxidation chemistry of NOx sources whereas δ15N-NO3- values in Pacific stratiform rainfall indicate the transport of nitrogen sources contributing to nitrate in atmospheric deposition. These findings provide necessary baseline information about the combination of water and nitrogen stable isotopes with atmospheric chemistry and hydrometeorological techniques to better understand wet deposition processes and to characterize the origin of inorganic nitrogen loadings in tropical regions.

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100 Years of Progress in Gas-Phase Atmospheric Chemistry Research

Cited by 14 publications

References 347 publications

Exploring Volatility Properties of Discrete Secondary Organic Aerosol Constituents of α-Pinene and Polycyclic Aromatic Hydrocarbons

Exploring Volatility Properties of Discrete Secondary Organic Aerosol Constituents of α-Pinene and Polycyclic Aromatic Hydrocarbons

Tropospheric Ozone Assessment Report

Stable Isotopic Characterization of Nitrate Wet Deposition in the Tropical Urban Atmosphere of Costa Rica

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