Modeling The Fiuctuational And Transformation Characteristics Of Peak Ground Level Ozone in Malaysian Ambient Air
Ground level ozone (O3) is a noxious air pollutant that Imposed adverse effect to human health, crop yield and the environment. Hence, it is important to understand their fluctuation and transformation characteristic which is still regarded at its infancy stage in Malaysia to properly design abat...
| Main Authors: | , , , |
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| Format: | Monograph |
| Published: |
Universiti Sains Malaysia
2016
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| Subjects: | |
| Online Access: | http://eprints.usm.my/37456/ |
| _version_ | 1848878197762949120 |
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| author | Ramli , Nor Azam Yahaya, Ahmad Shukri Md Yusof, Nor Faizah Fitri Mohamed, Nurul Izma |
| author_facet | Ramli , Nor Azam Yahaya, Ahmad Shukri Md Yusof, Nor Faizah Fitri Mohamed, Nurul Izma |
| author_sort | Ramli , Nor Azam |
| building | USM Institutional Repository |
| collection | Online Access |
| description | Ground level ozone (O3) is a noxious air pollutant that Imposed adverse effect to human
health, crop yield and the environment. Hence, it is important to understand their fluctuation
and transformation characteristic which is still regarded at its infancy stage in Malaysia to
properly design abatement and control strategies. Therefore, this study aimed to Investigate
the characteristics of O3 fluctuation and transformation from its precursors as well as to
introduce the critical conversion point (COP) of O3 formation. Next hour O3 prediction
models during daily, daytime, nighttime and critical conversion time were also developed
using multiple linear regression and principal component regression to predict O3
concentrations in different group of monitoring stations. This study consists of 18 areas across Malaysia from 1999 to 2010. Although an ovenwhelming majority of the recorded
data are below the prescribed levels in the Malaysian Ambient Air Quality Guidelines, total
of 1,988 hour of exceedences have been recorded with majority contributed by Shah Alam.
O3 diurnal cycles suggest a unimodal peak between 12 pm to 4 pm, while minimum
concentration is consistently measured on 8 am. Results of PCA showed the contributions
to O3 variation by NO2, NO, T and UVB is up to 80%, whereas the composite diurnal plots
confirmed that variation is highly depend on NO2 and NO concentrations. The CCP of O3
formation were identified to occur in between 8 am to 11 am. 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. Although the optimal model was during daily, the developed models using
critical conversion time were more consistent with minimal differences between MLR and
PGR in terms of error and accuracy. Effective ground level ozone control, need strategic,
systematic and concerted efforts amongenvironmental related agencies in Malaysia
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| first_indexed | 2025-11-15T17:27:31Z |
| format | Monograph |
| id | usm-37456 |
| institution | Universiti Sains Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T17:27:31Z |
| publishDate | 2016 |
| publisher | Universiti Sains Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | usm-374562022-09-21T07:54:20Z http://eprints.usm.my/37456/ Modeling The Fiuctuational And Transformation Characteristics Of Peak Ground Level Ozone in Malaysian Ambient Air Ramli , Nor Azam Yahaya, Ahmad Shukri Md Yusof, Nor Faizah Fitri Mohamed, Nurul Izma TA1-2040 Engineering (General). Civil engineering (General) Ground level ozone (O3) is a noxious air pollutant that Imposed adverse effect to human health, crop yield and the environment. Hence, it is important to understand their fluctuation and transformation characteristic which is still regarded at its infancy stage in Malaysia to properly design abatement and control strategies. Therefore, this study aimed to Investigate the characteristics of O3 fluctuation and transformation from its precursors as well as to introduce the critical conversion point (COP) of O3 formation. Next hour O3 prediction models during daily, daytime, nighttime and critical conversion time were also developed using multiple linear regression and principal component regression to predict O3 concentrations in different group of monitoring stations. This study consists of 18 areas across Malaysia from 1999 to 2010. Although an ovenwhelming majority of the recorded data are below the prescribed levels in the Malaysian Ambient Air Quality Guidelines, total of 1,988 hour of exceedences have been recorded with majority contributed by Shah Alam. O3 diurnal cycles suggest a unimodal peak between 12 pm to 4 pm, while minimum concentration is consistently measured on 8 am. Results of PCA showed the contributions to O3 variation by NO2, NO, T and UVB is up to 80%, whereas the composite diurnal plots confirmed that variation is highly depend on NO2 and NO concentrations. The CCP of O3 formation were identified to occur in between 8 am to 11 am. 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. Although the optimal model was during daily, the developed models using critical conversion time were more consistent with minimal differences between MLR and PGR in terms of error and accuracy. Effective ground level ozone control, need strategic, systematic and concerted efforts amongenvironmental related agencies in Malaysia Universiti Sains Malaysia 2016 Monograph NonPeerReviewed Ramli , Nor Azam and Yahaya, Ahmad Shukri and Md Yusof, Nor Faizah Fitri and Mohamed, Nurul Izma (2016) Modeling The Fiuctuational And Transformation Characteristics Of Peak Ground Level Ozone in Malaysian Ambient Air. Project Report. Universiti Sains Malaysia. (Submitted) |
| spellingShingle | TA1-2040 Engineering (General). Civil engineering (General) Ramli , Nor Azam Yahaya, Ahmad Shukri Md Yusof, Nor Faizah Fitri Mohamed, Nurul Izma Modeling The Fiuctuational And Transformation Characteristics Of Peak Ground Level Ozone in Malaysian Ambient Air |
| title | Modeling The Fiuctuational And
Transformation Characteristics Of Peak
Ground Level Ozone in Malaysian
Ambient Air |
| title_full | Modeling The Fiuctuational And
Transformation Characteristics Of Peak
Ground Level Ozone in Malaysian
Ambient Air |
| title_fullStr | Modeling The Fiuctuational And
Transformation Characteristics Of Peak
Ground Level Ozone in Malaysian
Ambient Air |
| title_full_unstemmed | Modeling The Fiuctuational And
Transformation Characteristics Of Peak
Ground Level Ozone in Malaysian
Ambient Air |
| title_short | Modeling The Fiuctuational And
Transformation Characteristics Of Peak
Ground Level Ozone in Malaysian
Ambient Air |
| title_sort | modeling the fiuctuational and
transformation characteristics of peak
ground level ozone in malaysian
ambient air |
| topic | TA1-2040 Engineering (General). Civil engineering (General) |
| url | http://eprints.usm.my/37456/ |