Atmospheric aerosols are complex mixtures of different chemical species, and individual
particles exist in many different shapes and morphologies. Together, these characteristics …

Abstract The 1999 Regional Haze Rule provides a context for this review of visibility, the
science that describes it, and the use of that science in regulatory guidance. The scientific …

Online coupled mesoscale meteorology atmospheric chemistry models have undergone a
rapid evolution in recent years. Although mainly developed by the air quality modelling …

Global simulations of sulfate, nitrate, and ammonium aerosols are performed for the present
day and 2050 using the chemical transport model GEOS‐Chem. Changes in climate and …

Regulatory and scientific applications of photochemical models are typically evaluated by
comparing model estimates to measured values. It is important to compare quantitative …

The lightest Non Methane HydroCarbon (NMHC), ie, acetylene (C 2 H 2) is found to form
secondary organic aerosol (SOA). Contrary to current belief, the number of carbon atoms, n …

A source-oriented CMAQ was applied to determine source sector/region contributions to
primary particulate matter (PPM) in China. Four months were simulated with emissions …

Influences of specific sources of inorganic PM 2.5 on peak and ambient aerosol
concentrations in the US are evaluated using a combination of inverse modeling and …

Source culpability assessments are useful for developing effective emissions control
programs. The Integrated Source Apportionment Method (ISAM) has been implemented in …

The direct effect of intraannual temperature variability on ozone and PM2. 5 concentrations
at the urban scale was simulated using a high‐resolution air quality model that tracks the …