The knowledge of the lightning-induced nitrogen oxides (LNO x) source is important for
understanding and predicting the nitrogen oxides and ozone distributions in the troposphere …

The extratropical upper troposphere and lower stratosphere (Ex‐UTLS) is a transition region
between the stratosphere and the troposphere. The Ex‐UTLS includes the tropopause, a …

This paper provides a review of stratosphere‐troposphere exchange (STE), with a focus on
processes in the extratropics. It also addresses the relevance of STE for tropospheric …

Wildfire is becoming the focus of increasing attention. It is now realized that changes in the
occurrence frequency and intensity of wildfires has important significant consequences for a …

We have constructed profiles of lightning NOχ mass distribution for use in specifying the
effective lightning NOχ source in global and regional chemical transport models. The profiles …

During the 20th century, the world's transportation system has changed dramatically with the
gradual emergence of a large fleet of commercial aircraft. Today, thousands of aircraft carry …

We describe an episode of a stratospheric intrusion into the free troposphere over Europe
followed by a long‐range transport of ozone from the North American boundary layer …

This paper presents studies of stratospheric intrusions in the Alps and northern Apennines,
their seasonal variations, and their effect on ozone concentrations. The results are based on …

We report observations and analysis of a pyro‐cumulonimbus event in the midst of a boreal
forest fire blowup in Northwest Territories Canada, near Norman Wells, on 3–4 August 1998 …

An overview is provided of the current understanding of transport in the middle atmosphere.
Over the past quarter century this subject has evolved from a basic recognition of the Brewer …