Themed collection Celebrating Environmental Science: Atmospheres’ First Year

29 items
Open Access Perspective

Optimising air quality co-benefits in a hydrogen economy: a case for hydrogen-specific standards for NOx emissions

Hydrogen may play a major role as an energy source to support net zero but combustion leads to emissions of NOx, a key air pollutant. Delivering optimal air quality co-benefits may need more ambitious hydrogen-specific emission standards developing.

Graphical abstract: Optimising air quality co-benefits in a hydrogen economy: a case for hydrogen-specific standards for NOx emissions
Open Access Critical Review

Aging of atmospheric aerosols and the role of iron in catalyzing brown carbon formation

Iron in mineral dust can catalyze reactions with atmospheric organics that lead to the formation of brown carbon (BrC) that impact the climate in a number of ways.

Graphical abstract: Aging of atmospheric aerosols and the role of iron in catalyzing brown carbon formation
Open Access Communication

Aerosol presence reduces the diurnal temperature range: an interval when the COVID-19 pandemic reduced aerosols revealing the effect on climate

DTRs from February to June during the COVID-19 pandemic are greater than 3 standard deviations above the climatological mean DTR.

Graphical abstract: Aerosol presence reduces the diurnal temperature range: an interval when the COVID-19 pandemic reduced aerosols revealing the effect on climate
Open Access Paper

Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry

Using real-time simultaneous gas- and particle-phase data, the condensation of naphthalene and β-caryophyllene oxidation products on a molecular level is discussed.

Graphical abstract: Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry
Open Access Paper

Human health risk assessment of atmospheric mercury inhalation around three artisanal small-scale gold mining areas in Indonesia

To clarify the human health risk of inhalation of gaseous elemental mercury (GEM), we measured GEM concentrations in three artisanal small-scale gold mining (ASGM) areas of Palu (Central Sulawesi), Muara Aman (Benkulu in Sumatra), and Palangka Raya (Central Kalimantan).

Graphical abstract: Human health risk assessment of atmospheric mercury inhalation around three artisanal small-scale gold mining areas in Indonesia
Open Access Paper

Characterization of black carbon aerosols over Indian Antarctic station, Maitri and identification of potential source areas

Black carbon measurements at Maitri, Antarctica during XXXVIII Antarctica expedition and found 82 ng m−3 and Patagonia is a definitive BC origin in addition to the day-to-day station related activities.

Graphical abstract: Characterization of black carbon aerosols over Indian Antarctic station, Maitri and identification of potential source areas
Open Access Paper

Cytotoxicity and chemical composition of women's personal PM2.5 exposures from rural China

Direct measurement with personal samplers captures the chemical complexity of PM2.5 exposures better than fixed monitors. To investigate biological effects, lung cells were exposed to extracts of exposure PM2.5 samples.

Graphical abstract: Cytotoxicity and chemical composition of women's personal PM2.5 exposures from rural China
Open Access Paper

Natural greenhouse gas and ozone-depleting substance sources and sinks from the peat bogs of Connemara, Ireland from 1994–2020

New emissions of methane and chloroform, with concurrent depositions of ozone and hydrogen were determined from the peat bogs of Ireland.

Graphical abstract: Natural greenhouse gas and ozone-depleting substance sources and sinks from the peat bogs of Connemara, Ireland from 1994–2020
Open Access Paper

Size-resolved characterization of organic aerosol in the North China Plain: new insights from high resolution spectral analysis

Size-resolved organic aerosol (OA) analysis elucidated largely different size distributions of primary and secondary OA, and oxidation states between urban and rural sites in different seasons.

Graphical abstract: Size-resolved characterization of organic aerosol in the North China Plain: new insights from high resolution spectral analysis
From the themed collection: Aerosol formation in the urban environment
Open Access Paper

Insights into HONO sources from observations during a solar eclipse

Nitrous acid (HONO) is a key precursor to the principal atmospheric oxidant OH. HONO measurements during a solar eclipse show little variation, implying the main HONO sources are photolytic, approximately balancing removal through photolysis.

Graphical abstract: Insights into HONO sources from observations during a solar eclipse
Open Access Paper

A computationally efficient model to represent the chemistry, thermodynamics, and microphysics of secondary organic aerosols (simpleSOM): model development and application to α-pinene SOA

Secondary organic aerosols (SOA) constitute an important fraction of fine-mode atmospheric aerosol mass.

Graphical abstract: A computationally efficient model to represent the chemistry, thermodynamics, and microphysics of secondary organic aerosols (simpleSOM): model development and application to α-pinene SOA
From the themed collection: Aerosol formation in the urban environment
Open Access Paper

Modeling the effect of reduced traffic due to COVID-19 measures on air quality using a chemical transport model: impacts on the Po Valley and the Swiss Plateau regions

Our results indicate that lockdown measures induced a mild increase in secondary organic aerosol (SOA) concentrations in areas with substantial reductions in nitrogen dioxide (NO2) concentrations, i.e. the “Greater Milan” area.

Graphical abstract: Modeling the effect of reduced traffic due to COVID-19 measures on air quality using a chemical transport model: impacts on the Po Valley and the Swiss Plateau regions
Open Access Paper

Emerging Investigator Series: COVID-19 lockdown effects on aerosol particle size distributions in northern Italy

Impact of lockdown measures on the air pollutants and particle number size distribution.

Graphical abstract: Emerging Investigator Series: COVID-19 lockdown effects on aerosol particle size distributions in northern Italy
Open Access Paper

Photo-oxidation of pinic acid in the aqueous phase: a mechanistic investigation under acidic and basic pH conditions

The mechanism of aqueous-phase OH-oxidation of pinic acid was investigated for the first time, and norpinic acid and 3-methyl-1,2,3-butanetricarboxylic acid were identified as major products. The mechanism is pH-dependent, with enhanced yields under basic conditions.

Graphical abstract: Photo-oxidation of pinic acid in the aqueous phase: a mechanistic investigation under acidic and basic pH conditions
Open Access Paper

Unraveling the complexity of atmospheric brown carbon produced by smoldering boreal peat using size-exclusion chromatography with selective mobile phases

Water-soluble BrC in freshly emitted boreal peat combustion particulate matter spans a wide range of molecular sizes, polarities, and light absorption properties; in addition, its largest fraction undergoes solvent-dependent aggregation/dissociation.

Graphical abstract: Unraveling the complexity of atmospheric brown carbon produced by smoldering boreal peat using size-exclusion chromatography with selective mobile phases
Open Access Paper

Formation of atmospheric molecular clusters from organic waste products and sulfuric acid molecules: a DFT study

DFT calculations show that skatole oxidation products may likely initiate the formation of nucleation precursors in the atmosphere.

Graphical abstract: Formation of atmospheric molecular clusters from organic waste products and sulfuric acid molecules: a DFT study
Open Access Paper

Unique calibration of passive air sampling for field monitoring of PAHs with polyethylene thin films across seasons and locations

For better insight into passive air sampling, we monitored PAHs with PE sheets during 8 seasons at 3 locations. A numerical model was applied to fit the limiting air-side boundary layer, which was surprisingly stable around 1 mm in all locations.

Graphical abstract: Unique calibration of passive air sampling for field monitoring of PAHs with polyethylene thin films across seasons and locations
Open Access Paper

Mineral and biological ice-nucleating particles above the South East of the British Isles

Mineral dust is responsible for the ice-nucleating properties of aerosol samples collected over the British Isles below ∼−20 °C, while an additional source, potentially biogenic, must explain the ice-nucleating properties at higher temperatures.

Graphical abstract: Mineral and biological ice-nucleating particles above the South East of the British Isles
Open Access Paper

Insights into the molecular composition of semi-volatile aerosols in the summertime central Arctic Ocean using FIGAERO-CIMS

Molecular-level analysis of High Arctic aerosols sampled on a cruise to the North Pole shows: (1) a wide range of semi-volatile organic compounds, (2) no clear relationship between DMS oxidation products in the gas- and particle-phase

Graphical abstract: Insights into the molecular composition of semi-volatile aerosols in the summertime central Arctic Ocean using FIGAERO-CIMS
Open Access Paper

Viscosity and liquid–liquid phase separation in healthy and stressed plant SOA

Molecular composition, viscosity, and phase state were investigated for secondary organic aerosol derived from synthetic mixtures of volatile organic compounds representing emissions from healthy and aphid-stressed Scots pine trees.

Graphical abstract: Viscosity and liquid–liquid phase separation in healthy and stressed plant SOA
Open Access Paper

On-road emissions of Euro 6d-TEMP passenger cars on Alpine routes during the winter period

Vehicles show higher emissions at cold temperature. Nevertheless, emissions during real world tests can be below Euro 6d-TEMP requirements. The relatively high PN emissions from gasoline and PHEV vehicles indicate there is still room for improvement.

Graphical abstract: On-road emissions of Euro 6d-TEMP passenger cars on Alpine routes during the winter period
Open Access Paper

Peroxy radical kinetics and new particle formation

Chamber experiments may over emphasize peroxy radical cross reactions due to lower concentrations of reactants that directly convert OH into HO2.

Graphical abstract: Peroxy radical kinetics and new particle formation
Open Access Paper

Comprehensive organic emission profiles, secondary organic aerosol production potential, and OH reactivity of domestic fuel combustion in Delhi, India

This study examines the volatility distribution of organic emissions from solid fuel combustion sources from Delhi, India, and examines the chemical drivers of the OH reactivity and the secondary organic aerosol production potential.

Graphical abstract: Comprehensive organic emission profiles, secondary organic aerosol production potential, and OH reactivity of domestic fuel combustion in Delhi, India
Open Access Paper

Measurements of the partitioning of nitric acid and sulfuric acid in aqueous/organic phase-separated systems

Measurements of partitioning of nitric acid and sulfuric acid between aqueous and organic phases show organic-phase acid is significant, which has implications for aerosol chemistry factors. These acids can then participate in organic reactions.

Graphical abstract: Measurements of the partitioning of nitric acid and sulfuric acid in aqueous/organic phase-separated systems
Open Access Paper

Effect of aromatic ring substituents on the ability of catechol to produce brown carbon in iron(III)-catalyzed reactions

Our previous work demonstrated formation of highly insoluble and strongly light-absorbing organic particles in reactions between catechol or guaiacol with Fe(III) under pH = 3 conditions characteristic of aerosol liquid water.

Graphical abstract: Effect of aromatic ring substituents on the ability of catechol to produce brown carbon in iron(iii)-catalyzed reactions
Open Access Paper

Multicomponent diffusion in atmospheric aerosol particles

Condensed phase mass transport in single aerosol particles is investigated using a linear quadrupole electrodynamic balance (LQ-EDB) and the Maxwell–Stefan (MS) framework.

Graphical abstract: Multicomponent diffusion in atmospheric aerosol particles
Open Access Paper

Quenching of ketone triplet excited states by atmospheric halides

The photosensitized chemistry of three aromatic ketones (xanthone, flavone, and acetophenone) and also of secondary organic aerosols (SOAs) arising from the photo-oxidation of naphthalene was investigated by means of transient absorption spectroscopy.

Graphical abstract: Quenching of ketone triplet excited states by atmospheric halides
Open Access Paper

Investigating the evolution of water-soluble organic carbon in evaporating cloud water

Cloud cycling plays a key role in the evolution of atmospheric particles and gases, producing secondary aerosol mass and transforming the optical properties and impacts of aerosols globally.

Graphical abstract: Investigating the evolution of water-soluble organic carbon in evaporating cloud water
Open Access Paper

Near-canopy horizontal concentration heterogeneity of semivolatile oxygenated organic compounds and implications for 2-methyltetrols primary emissions

This study calls attention to the primary emissions of semivolatile oxygenated organic compounds (SV-OVOCs) and demonstrates how mapping out the near-canopy concentration can effectively isolate atmospheric SV-OVOC production from direct emissions.

Graphical abstract: Near-canopy horizontal concentration heterogeneity of semivolatile oxygenated organic compounds and implications for 2-methyltetrols primary emissions
29 items

About this collection

To mark one year since Environmental Science: Atmospheres opened for submissions, we have put together a web collection to highlight the broad range of topics covered by our first articles, which link fundamental and applied research and cover global to molecular scales.

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