『Abstract
We report observations of primary and secondary atmospheric pollutants
such as nitrogen oxides, sulfur dioxide, toluene, and ozone during
the period February 2002 to August 2003 in Puertollano, an industrial
area located in central-southern Spain. The measurements were
performed using a commercial differential optical absorption spectroscopy
instrument. From the hourly data, we have analyzed the mean seasonal
levels and the daily evolution and we have examined the occurrence
of elevated pollution episodes. The daily cycles of NO, NO2, SO2, and toluene were
characterized by an early-morning maximum whereas O3
peaks were monitored around noon. Seasonally, the highest hourly
mean concentrations of NO, NO2, SO2,
and toluene, 14.2, 27.0, 34.4, and 12.1 μg m-3 respectively,
were found in the winter while O3 summer
levels reached 119.1 μg m-3. The dataset presented
here shows episodic occurrences of elevated concentrations that
exceeded the maximum levels established in the European Directives.
For instance, hourly values for SO2 were
repeatedly measured above 350 μg m-3. During the period
of measurements, the O3 thresholds (i.e.,
hourly value of 240 μg m-3) defined to protect the
human health have also been exceeded numerous times. Finally,
we investigate daily and seasonal patterns in pollution levels
within the context of local meteorology and photochemistry, vehicular
traffic, and industrial emissions.
Keywords: DOAS; Air quality; Ozone; SO2;
Toluene; NOx; Puertollano』
1. Introduction
2. observation site and experimental
2.1. Observation site
2.2. Experimental
3. Results and discussion
3.1. Seasonal levels
3.2. Daily variation of NO, NO2, O3, SO2, and toluene
3.3. Pollution episodes
4. Summary and conclusions
Acknowledgements
References