Seasonal and long term variations of surface ozone concentrations in Malaysian Borneo
dc.contributor.author | Latif, Mohd Talib | |
dc.contributor.author | Dominick, Doreena | |
dc.contributor.author | Ahamad, Fatimah | |
dc.contributor.author | Ahamad, Nur Shuhada | |
dc.contributor.author | Khan, Md Firoz | |
dc.contributor.author | Juneng, Liew | |
dc.contributor.author | Xiang, Chung Jing | |
dc.contributor.author | Nadzir, Mohd Shahrul Mohd | |
dc.contributor.author | Robinson, Andrew D. | |
dc.contributor.author | Ismail, Marzuki | |
dc.contributor.author | Mead, Mohammed Iqbal | |
dc.contributor.author | Harris, Neil | |
dc.date.accessioned | 2016-09-23T17:30:37Z | |
dc.date.available | 2016-09-23T17:30:37Z | |
dc.date.issued | 2016-08-27 | |
dc.description.abstract | Malaysian 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.citation | Latif, 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 494-504 | en_UK |
dc.identifier.issn | 0048-9697 | |
dc.identifier.uri | http://dx.doi.org/10.1016/j.scitotenv.2016.08.121 | |
dc.identifier.uri | http://dspace.lib.cranfield.ac.uk/handle/1826/10587 | |
dc.language.iso | en | en_UK |
dc.publisher | Elsevier | en_UK |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.subject | Surface ozone | en_UK |
dc.subject | Ozone precursors | en_UK |
dc.subject | Meteorological factors | en_UK |
dc.subject | Seasonal variations | en_UK |
dc.title | Seasonal and long term variations of surface ozone concentrations in Malaysian Borneo | en_UK |
dc.type | Article | en_UK |
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