Themed collection Atmospheric chemistry

Atmospheric sea-salt and halogen cycles play important roles in atmospheric science and chemistry including cloud processes and oxidation capacity in the Antarctic troposphere.

Aerosol mass spectrometer has been widely deployed in Asia for real-time characterization of aerosol chemistry, and has significantly improved our understanding of the sources, properties, and formation processes of aerosols in a complex environment.

The review article summarizes the wide variety of atmospheric chemistry phenomena that occur indoors.

A review of the current understanding of oxidants and their precursors in indoor environments.

We report on the development of a modelling consortium for chemistry in indoor environments that connects models over a range of spatial and temporal scales, from molecular to room scales and from sub-nanosecond to days, respectively.

Ozone (O₃), a main component in photochemical smog, is a secondary pollutant formed through complex photochemical reactions involving nitrogen oxides (NO_x) and volatile organic compounds (VOCs).

Isocyanic acid (HNCO) has recently been identified in ambient air at potentially concerning concentrations for human health. Since its first atmospheric detection, significant progress has been made in understanding its sources and sinks.

Gaseous iodomethane (CH₃I) once emitted in the atmosphere will interact very little with sea salt aerosol particles. However, a low amount of CH₃I is irreversibly adsorbed at the particle surface.

Acrolein is released by several sources into indoor air. As it impacts human health, an easy-to-handle, fast and robust method with low detection limits is needed.

Smelting is one of the main sources of rare earth elements (REEs) in large scale smelting regions that have been neglected before.

Changes in the composition and absorptivity of primary brown carbon aerosol generated from smoldering pine were measured during exposure to hydroxyl radical in a photo-reaction chamber.

The formation, abundance and sources of secondary organic aerosol markers and other related polar organic species were investigated at two Eastern Mediterranean sites.

A large group of trace elements (Al, As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Ti, V, Zn) was measured for the first time in 226 air samples collected at the coastal monitoring station in Gdynia (northern Poland), in the period from January 12th to August 30th, 2019.

Hygroscopic particulate matter constituents promote uptake of aerosol water, depending on relative humidity, which can constrain qualities such as organic aerosol phase state and inorganic aerosol deliquescence and efflorescence.

Light-absorbing brown carbon aerosols can have a marine origin over the coastal oceans and are likely associated with the sea salt component emitted from the ocean surface – significantly contributes to aerosol radiative forcing.

Guaiacol photodegradation rate constants in solution, liquid-like regions in ice (frozen solutions), and at the air–ice interface (vapor-deposited to snow).

Magnesium and calcium chloride salts contribute to the global atmospheric aerosol burden via emission of sea spray and mineral dust.

Heavy metal pollution in fine particulate matter (PM_2.5) is a serious environmental and health concern in China, particularly during winter.

With an ongoing interest in displacing petroleum-based sources of energy with biofuels, we measure and model the formation and composition of secondary organic aerosol (SOA) from organic compounds present in biofuels.

Leaching of toxic heavy metal oxoanions from PM_2.5 is related to acids and transition metals of PM_2.5.

The mechanisms of with NO, NO₂, and NO₃ were studied to reveal the atmospheric fate of , comprehensively.

This study presents the first local measurements of metals in snow from the Argentine Central Andes.

Investigation of CCl₃COCl as a Cl atom precursor for laboratory use in (relative) rate and product.

Composition of individual atmospheric particles reveals the influence of marine sources, terrestrial sources, and anthropogenic sources on atmospheric chemistry in the changing Alaskan Arctic.

Particle formation from methanesulfonic acid–amine multicomponent systems is investigated using a combined experimental and theoretical approach.

Global model for the atmospheric chemistry of PFCA precursors.

The incorporation of organic nitrates into viscous secondary organic aerosol during particle formation is enhanced relative to expected equilibrium partitioning, and is best described by a kinetically controlled “burying” mechanism.

The resistance-based models combined with a new soil re-emission parameterization reproduce the observed diel and seasonal patterns of Hg⁰ exchange.

The House Observations of Microbial and Environmental Chemistry (HOMEChem) study was a large-scale collaborative experimental investigation probing indoor air composition and chemistry.

The photolysis of nitrous acid (HONO) is the main initiation source of hydroxyl radical (OH) which in turn is the main oxidant controlling the oxidation capacity of the indoor atmosphere.

Objects in a room add 50% to its surface area beyond the walls, ceiling, and floor.

Indoor field studies and in situ chamber experiments illustrate the interdependence of oxidants and oxidant precursors in residences.

Secondary Product Creation Potential (SPCP): a new metric for ranking the impact of volatile organic compounds on indoor air chemistry and human health.

Occupancy in indoor spaces can contribute to indoor aerosol mass via reactions of oxidants such as ozone with skin constituents and subsequent partitioning of those oxidation product to existing aerosol.

The sources and sinks of isocyanic acid (HNCO), a toxic gas, in indoor environments are largely uncharacterized.

Insulation materials affect indoor air by (i) releasing primary volatile organic compounds (VOCs) from enclosure cavities to the interior space, (ii) mitigating exposure to outdoor pollutants through reactive deposition (of oxidants, e.g., ozone) or filtration in infiltration air, and (iii) generating secondary VOCs and gas-phase byproducts from chemical reactions.

Size distribution of o-PAHs vs. their parent compounds and their implications for dry deposition.

In this paper, we synthesize the size distribution and optical properties of the atmospheric water-soluble fraction of light-absorbing organic carbon (brown carbon; BrC) in the continental outflow from the Indo-Gangetic Plain (IGP) in South Asia to the North Indian Ocean.