Time Series Analysis of Surface Ozone Monitoring Records in Kemaman, Malaysia

Ismail, Marzuki; Ibrahim, Mohd Zamri; Ibrahim, Tg. Azmina; Abdullah, Ahmad Makmon

doi:10.5772/50033

Cited by 12 publications

(16 citation statements)

References 21 publications

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“…Back trajectory analysis (Fig. 5) showed that the southwest monsoon wind from Sumatra can arrive at both monitoring stations within 84 hours and is frequently associated with the incidence of haze episodes in the Malaysian Peninsula as a result of biomass burning, which is the burning of peat soil and plant residue in Sumatra, Indonesia, and Indochina that releases vast quantities of smoke, consisting of a high quantity of pollutants into the atmosphere, which affects visibility and absorbs incident radiation [27][28]. Meanwhile, ozone concentrations are at the lowest during the northeastern monsoon, which occurs annually between November and March and is usually associated with the wet season.…”

Section: Resultsmentioning

confidence: 99%

The Relationship between Daily Maximum Temperature and Daily Maximum Ground Level Ozone Concentration

Abdullah¹,

Ismail²,

Yuen³

et al. 2017

Pol. J. Environ. Stud.

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Section: Resultsmentioning

confidence: 99%

The Relationship between Daily Maximum Temperature and Daily Maximum Ground Level Ozone Concentration

Abdullah¹,

Ismail²,

Yuen³

et al. 2017

Pol. J. Environ. Stud.

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“…Cluster 3 (Kemaman) is with a total area of 2535 km 2 and total population 166,750 in 2010. Only two major industrial sites (i.e., Kerteh Petrochemical and Gebeng Industrial Area) are located in and near Kemaman (Ismail et al, 2011). However, the higher ozone level in this location comparing to others may be due to transport of air pollutants from other locations and several meteorological parameters which always been associated with ozone variations such as wind speed and directions.…”

Section: Hacamentioning

confidence: 99%

The Influence of Spatial Variability of Critical Conversion Point (CCP) in Production of Ground Level Ozone in the Context of Tropical Climate

Awang

Elbayoumi

Ramli

et al. 2016

Aerosol Air Qual. Res.

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Critical conversion point (CCP) is a very crucial step in production of the ground level O 3 chemistry. Thus, a multivariate analysis was applied on the dataset of nine selected locations in Malaysia from 1999 to 2010. It incorporated hierarchical agglomerative cluster analysis (HACA) to explore the spatial variability of CCP and principal component analysis (PCA) to determine the major sources of the air pollutants that influence ozone CCP. High variability in CCP was observed between the monitoring stations that occurred during critical conversion time (CCT) from 8:00 a.m. to 11:00 a.m. The HACA results grouped the nine monitoring stations into three different clusters, based on the characteristics of ozone concentrations during CCT period. Results of PCA for the three clusters showed that the contributions to O 3 level variation during CCT by meteorological variables (UVB, temperature, relative humidity, and wind speed) are higher at 51.6%, 48.5%, and 33.3% than that of primary air pollutants (NO 2 , SO 2 , PM 10 ) at 19.2%, 21.4%, and 15.2% for cluster 1, cluster 2, and cluster 3, respectively. Therefore, applying a targeted spatial control strategy for ground level O 3 precursors during the CCT period is a crucial step.

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“…In general, this district is relatively underdeveloped, except for a few places along the coastline, in which steel and petrochemical plants are located (Sulong et al, 2002). Only two major industrial sites (i.e., Kerteh Petrochemical and Gebeng Industrial Area) are located in and near Kemaman (Ismail et al, 2011). In terms of weather conditions, this district experiences a wet equatorial climate characterized by high temperatures all year round, with seasonal heavy rains during the northeast monsoon from November to January (Sulong et al, 2002).…”

Section: Sampling Sitementioning

confidence: 99%

High Nighttime Ground-Level Ozone Concentrations in Kemaman: NO and NO2 Concentrations Attributions

Awang

Ramli

Yahaya

et al. 2015

Aerosol Air Qual. Res.

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High nighttime ozone (O 3 ) concentration levels were observed in Kemaman, Terengganu, and results were compared with those in other places in Malaysia. In this study, the contribution of precursors [nitric oxide (NO) and nitrogen dioxide (NO 2 )] and meteorological factors wind speed, and wind direction) toward long-term high nighttime O 3 over the period of 1999 to 2010 was evaluated. During this period, the recorded highest nighttime O 3 ground level was 89 ppb with more than 25% surpassing 20 ppb. Analysis shows that minimal decreasing trends were measured in Kemaman. Lower nitrogen oxide (NO x ) concentrations restricted the sinking agents; thus, reducing the depletion rates allowed O 3 to remain in the atmosphere. Minimal associations were observed between the O 3 concentration level and the speed and direction of wind. Accordingly, the largest contributor toward high nighttime O 3 ground level concentration in Kemaman was most probably NO x concentration.

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Time Series Analysis of Surface Ozone Monitoring Records in Kemaman, Malaysia

Cited by 12 publications

References 21 publications

The Relationship between Daily Maximum Temperature and Daily Maximum Ground Level Ozone Concentration

The Relationship between Daily Maximum Temperature and Daily Maximum Ground Level Ozone Concentration

The Influence of Spatial Variability of Critical Conversion Point (CCP) in Production of Ground Level Ozone in the Context of Tropical Climate

High Nighttime Ground-Level Ozone Concentrations in Kemaman: NO and NO2 Concentrations Attributions

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