Gas-phase chemical mechanisms are vital components of prognostic air quality models. The
mechanisms are incorporated into modules that are used to calculate the chemical sources …

Satellite-based retrievals of tropospheric NO 2 columns are widely used to infer NO x (≡
NO+ NO 2) emissions. These retrievals rely on model information for the vertical distribution …

The Regional Atmospheric Chemistry Mechanism (RACM) is a gas-phase chemical
mechanism that is widely used for the modeling of regional atmospheric chemistry. Much …

The understanding of oxidation in forest atmospheres is being challenged by measurements
of unexpectedly large amounts of hydroxyl (OH). A significant number of these OH …

Nitrogen oxides (NO x) are important components of ambient and indoor air pollution and
are emitted from a range of combustion sources, including on-road mobile sources, electric …

Lightning is one of the most important sources of upper tropospheric NO x; however, there is
a large spread in estimates of the global emission rates (2–8 Tg N yr− 1). We combine upper …

A lightning-nitrogen oxide (NO) algorithm is implemented in the Community Multiscale Air
Quality Model (CMAQ) and used to evaluate the impact of lightning-NO emissions (LNO x) …

The impact of nitric oxide (NO) emissions by lightning on summertime North American
nitrogen oxides (NOx) and ozone is studied using the Global Modeling Initiative (GMI) CTM …

Stratospheric intrusions are an important source of ozone (O3) in the troposphere. In this
study, 17 years of O3 sounding data from the Hong Kong Observatory with a weekly …

Although positive environmental aspects of increasing urban vegetative spaces are
undeniable, using predefined or unmanaged long-term green programs may cause …