Temporal Analysis of Ozone and Nitrogen Oxides Fluctuations at Pasir Gudang, Malaysia

Abstract:

Ozone (O₃) and nitrogen oxides (NO_x) are closely related in the atmosphere. In ambient air, these pollutants always fluctuated depending on their emission sources and meteorological influences. The paper is aims to gain insight understanding of the monthly temporal variation of O₃ and NO_x concentrations to enable proper control strategies against these pollutants. One-year monitoring records from 1^st January to 31^st December 2009 of O₃ and NO_x at Pasir Gudang, were obtained from Department of Environmental Malaysia. Temporal analysis of O₃ and NO_x concentration fluctuation during annual and monthly were assessed using time series and scatter plots. The annual variations of O₃ concentrations were negatively correlated with annual variation of NO and NO₂ concentrations. Results suggest that NO concentration are higher than O₃ and NO₂ especially in May 2009. However, zero exceedences were recorded in the studied period for all pollutants against the Malaysia Ambient Air Quality Guidelines.

• Periodical: Applied Mechanics and Materials (Volumes 773-774)
• Pages: 1237-1241
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.773-774.1237
• Online since: July 2015
• Authors: Norrimi Rosaida Awang, Nor Azam Ramli*, Ahmad Shukri Yahaya
• Keywords: Annual Fluctuations, Monthly Fluctuations, Nitric Oxide, Nitrogen Dioxide, Time Series Plot

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