The hydroxyl radical (• OH) is one of the most powerful oxidizing agents, able to react
unselectively and instantaneously with the surrounding chemicals, including organic …

Multiphase chemistry plays a vital role in the Earth system, climate, and health. Chemical
reactions, mass transport, and phase transitions between gases, liquids, and solids are …

Ground-based Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS)
measurements of nitrous acid (HONO) and its precursor NO 2 (nitrogen dioxide) as well as …

We performed measurements of nitrous acid (HONO) during the PRIDE-PRD2006 campaign
in the Pearl River Delta region 60 km north of Guangzhou, China, for 4 weeks in June 2006 …

High levels of HONO have frequently been observed in Chinese haze periods and
underestimated by current models due to some unknown sources and formation …

Nitrate is an important component of atmospheric particulate matter and affects air quality,
climate, human health, and the ecosystem. Nitrate was previously considered a permanent …

Photolysis of nitrate (NO3–) produces reactive nitrogen and oxygen species via three
different channels, forming:(1) nitrogen dioxide (NO2) and hydroxyl radical (• OH),(2) nitrite …

In this study, continuous measurements of HONO and related parameters were carried out at
an urban site in Beijing during intense summer and winter campaigns. Highly variable …

Gaseous nitrous acid (HONO) is an important precursor of tropospheric hydroxyl radicals
(OH). OH is responsible for atmospheric self-cleansing and controls the concentrations of …

Haze events in China megacities involve the rapid oxidation of SO2 to sulfate aerosol. Given
the weak photochemistry that takes place in these optically thick hazes, it has been …