The nitrate radical, NO3, is photochemically unstable but is one of the most chemically
important species in the nocturnal atmosphere. It is accompanied by the presence of …

Measurements of ozone throughout the troposphere clearly show an annual cycle. Over the
last couple of decades it has become apparent that the measured annual cycle of ozone in …

Exposure to ambient volatile organic compound (VOCs) in urban areas is of interest
because of their potential chronic and acute adverse effects to public health. Limited …

The Meteorological Synthesizing Centre-West (MSC-W) of the European Monitoring and
Evaluation Programme (EMEP) has been performing model calculations in support of the …

A global climatological distribution of tropospheric OH is computed using observed
distributions of O3, H2O, NOt (NO2+ NO+ 2N2O5+ NO3+ HNO2+ HNO4), CO, hydrocarbons …

Trend analyses were performed on several indicators of Arctic haze using data from sites
located in the North American, Norwegian, Finnish and Russian Arctic for the spring months …

Nonmethane hydrocarbons (NMHC) play an important role in global scale tropospheric
photochemistry. The representation of NMHC chemistry in three‐dimensional tropospheric …

Grab samples for nonmethane hydrocarbons (NMHCs) were collected from three sites: daily
at Alert, Northwest Territories (82.5° N, 62.3° W) from January 21 to April 19, daily at an ice …

We use a 3‐D chemical transport model (the GEOS‐Chem CTM) to evaluate a global
emission inventory for ethane (C2H6), with a best estimate for the global source of 13 Tg yr …

Air quality data from a one year study at an urban roadside location in Central London are
reported for a large number of both organic and inorganic air pollutants. The location is 5 m …