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Time effects of high particulate events on the critical conversion point of ground-level ozone

Particulate matter (PM), especially those with an aerodynamic particle size of less than 10 μm (PM10), is typically emitted from transboundary forest fires. A large-scale forest fire may contribute to a haze condition known as a high particulate event (HPE), which has affected Southeast Asia, partic...

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Main Authors: Awang, Norrimi Rosaida, Ramli, Nor Azam, Shith, Syabiha, Md Yusof, Noor Faizah Fitri, Zainordin, Nazatul Syadia, Sansuddin, Nurulilyana, Ghazalie, Nurul Adyani
Format: Article
Language:English
Published: Elsevier 2018
Online Access:http://psasir.upm.edu.my/id/eprint/74309/1/Time%20effects%20of%20high%20particulate%20events%20on%20the%20critical%20conversion%20point%20of%20ground-level%20ozone.pdf
http://psasir.upm.edu.my/id/eprint/74309/
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spelling my.upm.eprints.743092020-03-30T07:55:06Z http://psasir.upm.edu.my/id/eprint/74309/ Time effects of high particulate events on the critical conversion point of ground-level ozone Awang, Norrimi Rosaida Ramli, Nor Azam Shith, Syabiha Md Yusof, Noor Faizah Fitri Zainordin, Nazatul Syadia Sansuddin, Nurulilyana Ghazalie, Nurul Adyani Particulate matter (PM), especially those with an aerodynamic particle size of less than 10 μm (PM10), is typically emitted from transboundary forest fires. A large-scale forest fire may contribute to a haze condition known as a high particulate event (HPE), which has affected Southeast Asia, particularly Peninsular Malaysia, for a long time. Such event can alter the photochemical reactions of secondary pollutants. This work investigates the influence of PM on ground-level ozone (O3) formation during HPE. Five continuous air quality monitoring stations from different site categories (i.e., industrial, urban and background) located across Peninsular Malaysia were selected in this study during the HPEs in 2013 and 2014. Result clearly indicated that O3 concentrations were significantly higher during HPE than during non-HPE in all the sites. The O3 diurnal variation in each site exhibited a similar pattern, whereas the magnitudes of variation during HPE and non-HPE differed. Light scattering and atmospheric attenuation were proven to be associated with HPE, which possibly affected O3 photochemical reactions during HPE. Critical conversion time was used as the main determining factor when comparing HPE and non-HPE conditions. A possible screening effect that resulted in the shifting of the critical transformation point caused a delay of approximately of 15–30 min. The shifting was possibly influenced by the attenuation of sunlight in the morning during HPE. A negative correlation between O3 and PM10 was observed during the HPE in Klang in 2013 and 2014, with −0.87. Essentially, HPE with a high PM concentration altered ground-level O3 formation. Elsevier 2018 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/74309/1/Time%20effects%20of%20high%20particulate%20events%20on%20the%20critical%20conversion%20point%20of%20ground-level%20ozone.pdf Awang, Norrimi Rosaida and Ramli, Nor Azam and Shith, Syabiha and Md Yusof, Noor Faizah Fitri and Zainordin, Nazatul Syadia and Sansuddin, Nurulilyana and Ghazalie, Nurul Adyani (2018) Time effects of high particulate events on the critical conversion point of ground-level ozone. Atmospheric Environment, 187. 328 - 334. ISSN 1352-2310 10.1016/j.atmosenv.2018.06.008
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Particulate matter (PM), especially those with an aerodynamic particle size of less than 10 μm (PM10), is typically emitted from transboundary forest fires. A large-scale forest fire may contribute to a haze condition known as a high particulate event (HPE), which has affected Southeast Asia, particularly Peninsular Malaysia, for a long time. Such event can alter the photochemical reactions of secondary pollutants. This work investigates the influence of PM on ground-level ozone (O3) formation during HPE. Five continuous air quality monitoring stations from different site categories (i.e., industrial, urban and background) located across Peninsular Malaysia were selected in this study during the HPEs in 2013 and 2014. Result clearly indicated that O3 concentrations were significantly higher during HPE than during non-HPE in all the sites. The O3 diurnal variation in each site exhibited a similar pattern, whereas the magnitudes of variation during HPE and non-HPE differed. Light scattering and atmospheric attenuation were proven to be associated with HPE, which possibly affected O3 photochemical reactions during HPE. Critical conversion time was used as the main determining factor when comparing HPE and non-HPE conditions. A possible screening effect that resulted in the shifting of the critical transformation point caused a delay of approximately of 15–30 min. The shifting was possibly influenced by the attenuation of sunlight in the morning during HPE. A negative correlation between O3 and PM10 was observed during the HPE in Klang in 2013 and 2014, with −0.87. Essentially, HPE with a high PM concentration altered ground-level O3 formation.
format Article
author Awang, Norrimi Rosaida
Ramli, Nor Azam
Shith, Syabiha
Md Yusof, Noor Faizah Fitri
Zainordin, Nazatul Syadia
Sansuddin, Nurulilyana
Ghazalie, Nurul Adyani
spellingShingle Awang, Norrimi Rosaida
Ramli, Nor Azam
Shith, Syabiha
Md Yusof, Noor Faizah Fitri
Zainordin, Nazatul Syadia
Sansuddin, Nurulilyana
Ghazalie, Nurul Adyani
Time effects of high particulate events on the critical conversion point of ground-level ozone
author_facet Awang, Norrimi Rosaida
Ramli, Nor Azam
Shith, Syabiha
Md Yusof, Noor Faizah Fitri
Zainordin, Nazatul Syadia
Sansuddin, Nurulilyana
Ghazalie, Nurul Adyani
author_sort Awang, Norrimi Rosaida
title Time effects of high particulate events on the critical conversion point of ground-level ozone
title_short Time effects of high particulate events on the critical conversion point of ground-level ozone
title_full Time effects of high particulate events on the critical conversion point of ground-level ozone
title_fullStr Time effects of high particulate events on the critical conversion point of ground-level ozone
title_full_unstemmed Time effects of high particulate events on the critical conversion point of ground-level ozone
title_sort time effects of high particulate events on the critical conversion point of ground-level ozone
publisher Elsevier
publishDate 2018
url http://psasir.upm.edu.my/id/eprint/74309/1/Time%20effects%20of%20high%20particulate%20events%20on%20the%20critical%20conversion%20point%20of%20ground-level%20ozone.pdf
http://psasir.upm.edu.my/id/eprint/74309/
_version_ 1665896015340765184
score 13.211869

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