Seasonal and long term variations of surface ozone concentrations in Malaysian Borneo

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dc.contributor.authorLatif, Mohd Talib
dc.contributor.authorDominick, Doreena
dc.contributor.authorAhamad, Fatimah
dc.contributor.authorAhamad, Nur Shuhada
dc.contributor.authorKhan, Md Firoz
dc.contributor.authorJuneng, Liew
dc.contributor.authorXiang, Chung Jing
dc.contributor.authorNadzir, Mohd Shahrul Mohd
dc.contributor.authorRobinson, Andrew D.
dc.contributor.authorIsmail, Marzuki
dc.contributor.authorMead, Mohammed Iqbal
dc.contributor.authorHarris, Neil R. P.
dc.date.accessioned2016-09-23T17:30:37Z
dc.date.available2016-09-23T17:30:37Z
dc.date.issued2016-08-27
dc.description.abstractMalaysian Borneo has a lower population density and is an area known for its lush rainforests. However, changes in pollutant profiles are expected due to increasing urbanisation and commercial-industrial activities. This study aims to determine the variation of surface {O3} concentration recorded at seven selected stations in Malaysian Borneo. Hourly surface {O3} data covering the period 2002 to 2013, obtained from the Malaysian Department of Environment (DOE), were analysed using statistical methods. The results show that the concentrations of {O3} recorded in Malaysian Borneo during the study period were below the maximum Malaysian Air Quality Standard of 100 ppbv. The hourly average and maximum {O3} concentrations of 31 and 92 ppbv reported at Bintulu (S3) respectively were the highest among the {O3} concentrations recorded at the sampling stations. Further investigation on {O3} precursors show that sampling sites located near to local petrochemical industrial activities, such as Bintulu (S3) and Miri (S4), have higher NO2/NO ratios (between 3.21 and 5.67) compared to other stations. The normalised {O3} values recorded at all stations were higher during the weekend compared to weekdays (unlike its precursors) which suggests the influence of {O3} titration by {NO} during weekdays. The results also show that there are distinct seasonal variations in {O3} across Borneo. High surface {O3} concentrations were usually observed between August and September at all stations with the exception of station {S7} on the east coast. Majority of the stations (except {S1} and S6) have recorded increasing averaged maximum concentrations of surface {O3} over the analysed years. Increasing trends of {NO2} and decreasing trends of {NO} influence the yearly averaged maximum of {O3} especially at S3. This study also shows that variations of meteorological factors such as wind speed and direction, humidity and temperature influence the concentration of surface O3.en_UK
dc.identifier.citationLatif, M. Y. (2016) Seasonal and long term variations of surface ozone concentrations in Malaysian Borneo, Science of The Total Environment, Volume 573, 15 December 2016, Pages 494-504en_UK
dc.identifier.issn0048-9697
dc.identifier.urihttp://dx.doi.org/10.1016/j.scitotenv.2016.08.121
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10587
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectSurface ozoneen_UK
dc.subjectOzone precursorsen_UK
dc.subjectMeteorological factorsen_UK
dc.subjectSeasonal variationsen_UK
dc.titleSeasonal and long term variations of surface ozone concentrations in Malaysian Borneoen_UK
dc.typeArticleen_UK

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