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Trend and Status of Ozone Concentration at Different Monitoring Station
in Penang
Faridah Binti Mohd Hassan
Supervisor: Dr. Nurul Adyani Binti Ghazali
Bachelor of Technology (Environment)
School of Ocean Engineering
Universiti Malaysia Terengganu
Ozone (O3) is known as one of the most severe air pollution problems in the world.
The aim of this study is to determine trend of O3 concentration and its correlation with
precursors at three different monitoring stations in Penang. Hourly variation of O3 and
their precursors, namely nitrogen dioxide (NO2), nitrogen oxide (NO) and
meteorological parameters (temperature and wind speed) were presented using time
series plots. Results show that hourly variation of O3 showed a maximum
concentration recorded between hours 1300 to 1400 while NOx and NO2 exhibited
two maxima, at about 0800-1000 and hour 2000-2100. The daily circle of O3
concentration revealed a lower nightly level and inverse relation between O3 and NOx,
evidencing the photochemical formation of O3. Additionally, meteorological factors,
particularly the temperature may influence the concentration of O3 in the atmosphere.
Finding from this study can be used as a basic for issuing advance warning to the
public prior to O3 reaching the peak concentration of a day.
27 | U M T U N D E R G R A D U A T E R E S E A R C H D A Y 2019