Application Of Air Compass Software For Source
Identification Of Semi-volatile Organic
Compounds In Whitbourne, UK
Author(s)
S. Pongpiachan, T. Supadit, P. Hirunyatrakul,
I. Kittikoon & S. Whangthamrongwit
Abstract
One of the most controversial issues on air pollution field is how to
quantitatively identify the emission source of gaseous species in atmospheric
environment. Air Compass Software was carefully designed for this special
purpose by using C# program. Given that wind direction is measured as an angle
(α) relative to true north (0), mean direction was determined by using
trigonometric relations to determine the direction of the resultant of individual
wind vectors. The emission source strength – wind direction relationship can be
represented graphically by plotting R-value of (natural logarithm of partial
pressure) vs. against downwind angle (α) during the monitoring period. To apply
this relationship, measured atmospheric concentrations must be expressed as
partial pressures (P), which can be converted through the use of the ideal gas law
with a temperature correction. The aims of this study are to statistically quantify
the relationships between emission source strengths and downwind angles of
Semi-Volatile Organic Compounds (SVOCs) measured at Whitbourne
monitoring stations adjacent to Worcester city, UK from 20/11/2003 to
22/12/2003 (cold-period) and from 5/5/2004 to 26/5/2004 (warm-period). Air
Keywords
semi-volatile organic compounds, wind direction, trigonometric, air compass software, Whitbourne
Related Book
Other papers in this volume
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