Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone

Ground level ozone (O3) is a noxious air pollutant that imposed adverse effects to human health, crop yield and the environment. Hence, it is important to understand their fluctuation and transformation characteristics in Malaysia in order to design abatement and control strategies properly. Theref...

Full description

Saved in:

Bibliographic Details
Main Author:	Awang, Norrimi Rosaida
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TA1-2040 Engineering (General) Civil engineering (General)
Online Access:	http://eprints.usm.my/40780/1/NORRIMI_ROSAIDA_AWANG_24_pages.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.40780
record_format	uketd_dc
spelling	my-usm-ep.407802018-06-13T03:05:41Z Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone 2015 Awang, Norrimi Rosaida TA1-2040 Engineering (General). Civil engineering (General) Ground level ozone (O3) is a noxious air pollutant that imposed adverse effects to human health, crop yield and the environment. Hence, it is important to understand their fluctuation and transformation characteristics in Malaysia in order to design abatement and control strategies properly. Therefore, this study aimed at investigating the characteristics of O3 fluctuation and transformation from its precursors as well as to introduce the critical conversion point (CCP) of O3 formation in 18 monitoring stations across Malaysia from 1999 to 2010. The next hour O3 prediction models during daily, daytime, nighttime and critical conversion time were also developed using multiple linear regression (MLR) and principal components regression (PCR) to predict O3 concentrations in different groups of monitoring stations. Groups of monitoring stations were based on the Department of Environment, Malaysia in terms of classification and newly developed groups using ranking of means and cluster analysis. Although majority of the recorded data was below 100 ppb, total of 1,995 hour of exceedances have been recorded, with Shah Alam contributed 885 hour or 44.5%. O3 diurnal cycles suggested a uni-modal peak between 12 p.m. to 4 p.m., while minimum concentrations were consistently measured at 8 a.m.. Results of PCA showed the contributions to O3 variation by NO2, NO, temperature and UVB up to 80%, whereas the composite diurnal plots confirmed that variation is highly influenced by NO2 and NO concentrations. The CCP of O3 formation were identified to occur between 8 a.m. to 11 a.m.. The MLR model based on cluster group during daily exhibited optimal performance in terms of coefficient of determination, prediction accuracy, and index of agreement with values of 0.9351, 0.9671 and 0.9831,respectively. 2015 Thesis http://eprints.usm.my/40780/ http://eprints.usm.my/40780/1/NORRIMI_ROSAIDA_AWANG_24_pages.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Awam
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TA1-2040 Engineering (General) Civil engineering (General)
spellingShingle	TA1-2040 Engineering (General) Civil engineering (General) Awang, Norrimi Rosaida Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone
description	Ground level ozone (O3) is a noxious air pollutant that imposed adverse effects to human health, crop yield and the environment. Hence, it is important to understand their fluctuation and transformation characteristics in Malaysia in order to design abatement and control strategies properly. Therefore, this study aimed at investigating the characteristics of O3 fluctuation and transformation from its precursors as well as to introduce the critical conversion point (CCP) of O3 formation in 18 monitoring stations across Malaysia from 1999 to 2010. The next hour O3 prediction models during daily, daytime, nighttime and critical conversion time were also developed using multiple linear regression (MLR) and principal components regression (PCR) to predict O3 concentrations in different groups of monitoring stations. Groups of monitoring stations were based on the Department of Environment, Malaysia in terms of classification and newly developed groups using ranking of means and cluster analysis. Although majority of the recorded data was below 100 ppb, total of 1,995 hour of exceedances have been recorded, with Shah Alam contributed 885 hour or 44.5%. O3 diurnal cycles suggested a uni-modal peak between 12 p.m. to 4 p.m., while minimum concentrations were consistently measured at 8 a.m.. Results of PCA showed the contributions to O3 variation by NO2, NO, temperature and UVB up to 80%, whereas the composite diurnal plots confirmed that variation is highly influenced by NO2 and NO concentrations. The CCP of O3 formation were identified to occur between 8 a.m. to 11 a.m.. The MLR model based on cluster group during daily exhibited optimal performance in terms of coefficient of determination, prediction accuracy, and index of agreement with values of 0.9351, 0.9671 and 0.9831,respectively.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Awang, Norrimi Rosaida
author_facet	Awang, Norrimi Rosaida
author_sort	Awang, Norrimi Rosaida
title	Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone
title_short	Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone
title_full	Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone
title_fullStr	Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone
title_full_unstemmed	Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone
title_sort	assessment of fluctuational and critical transformational behaviour of ground level ozone
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Awam
publishDate	2015
url	http://eprints.usm.my/40780/1/NORRIMI_ROSAIDA_AWANG_24_pages.pdf
_version_	1747820821667119104

Assessment Of Fluctuational And Critical Transformational Behaviour Of Ground Level Ozone

Similar Items