Meteorological Factors in Dispersion Modelling of SO2 and NO2 in Baia Mare, Romania

Atmospheric dispersion characterizes the evolution in time and space of an ensemble of pollutants
(aerosols, gases, dust, etc.) emitted into the atmosphere. Atmospheric dispersion phenomenon is
influenced by different atmospheric conditions, soil and relief parameters and emission values. The
atmospheric dispersion model is the mathematical simulation of how air pollutants disperse. Such
models are used to estimate the concentration of air pollutants emitted from industrial activity,
domestic, rural and diffuse sources.
The paper presents the variety of atmospheric dispersion models on concentrations of SO2 and NO2
made according to the time variation of meteorological parameters (atmospheric pressure, relative
humidity, rainfall, wind speed, solar radiation, etc.) specific to the Maramureș area, in particular to the
Baia Mare Urban System area. The results had been correlated between specific climatic factors with
the pollution of the atmosphere, referred to data monthly and weekly fluctuations of NO2 and SO2. For
the climatic measurements, recordings have been made on the following parameters: air temperature,
air relative humidity, wind speed, cloud coverage and solar radiation. Measurements have been made
between 2010 and 2013, and interpreted using the models offered by G.S. Surfer software. The use
of G.S. Surfer software in climatic studies is useful because it creates a great precision graphic
representation for everyone interested in having an idea about climate and related pollution issues
regarding a specific urban area.