Objective: To study the mechanism of formation of air quality and to determine the
impact of the studied factors on asthma morbidity in Vladivostok.
Methods: The evaluation of air pollution in Vladivostok was done using long-term
(2008–2012) monitoring data (temperature, humidity, atmospheric pressure, wind
speed, etc.). The levels of suspended particulate matter, nitrogen and sulfur dioxide,
carbon monoxide, ammonia, formaldehyde (mg/m3) in six stationary observation posts
were assessed. We studied the aerosol suspensions of solid particles, which were
collected during snowfall from precipitation (snow) and air in 14 districts with different
levels of anthropogenic impact. Melted snow was analyzed on laser granulometry. The
impact of air pollution on the distribution of asthma morbidity was evaluated in various
age groups by data of federal statistical observation obtained from 8 adults and 7 children
municipal clinics in Vladivostok (2008–2012).
Results: The content of suspended particulate components of pollution remained more
stable, due to the features of atmospheric circulation, rugged terrain and residential
development. The nano- and micro-sized particles (0–50 mm), which can absorb highly
toxic metals, prevail in dust aerosols. These respirable fractions of particles, even in small
doses, can contribute to the increase in asthma morbidity in the city.