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Does light pollution affect nighttime ground-level ozone concentrations?

Ground-level ozone (O3) is mainly produced during daytime in the presence of ultraviolet (UV) light and later destroyed by nitrogen oxides during nighttime. However, light pollution caused by the excessive use of artificial lights may disrupt the chemistry of night-time ground-level O3 by providing...

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Huvudupphovsmän: Shith, Syabiha, Ramli, Nor Azam, Awang, Norrimi Rosaida, Ismail, Mohd Rodzi, Latif, Mohd Talib, Zainordin, Nazatul Syadia
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Publicerad: MDPI 2022
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id oai:psasir.upm.edu.my:100998
record_format eprints
spelling oai:psasir.upm.edu.my:100998 http://psasir.upm.edu.my/id/eprint/100998/ Does light pollution affect nighttime ground-level ozone concentrations? Shith, Syabiha Ramli, Nor Azam Awang, Norrimi Rosaida Ismail, Mohd Rodzi Latif, Mohd Talib Zainordin, Nazatul Syadia Ground-level ozone (O3) is mainly produced during daytime in the presence of ultraviolet (UV) light and later destroyed by nitrogen oxides during nighttime. However, light pollution caused by the excessive use of artificial lights may disrupt the chemistry of night-time ground-level O3 by providing enough energy to initiate nighttime ground-level O3 production. In this study, nighttime (7 p.m. to 7 a.m.) ground-level O3, nitrogen oxide (NO), and nitrogen dioxides (NO2) concentrations were observed for three years (2013, 2014, and 2015). The existence of O3 was found during nighttime, especially in urban areas with a concentration range of 8–20 ppb. The results suggested that nighttime variations of ground-level O3 concentrations were higher in urban areas than in suburban areas. The mean nighttime O3 concentration at urban sites varied, possibly because the distribution of anthropogenic lights around the urban sites is brighter than in suburban locations, as indicated by the data from the light-pollution map. This anthropogenic light has not caused the suspected nighttime photolysis processes, which directly slowed nighttime oxidation. The photochemistry rate of JNO2/k3 was supposed to be near zero because of the absence of photochemical reactions at night. However, the minimum concentration in all urban and suburban sites ranged from 2–3 ppb, indicating that O3 might also form at night, albeit not due to light pollution. MDPI 2022-11-06 Article PeerReviewed Shith, Syabiha and Ramli, Nor Azam and Awang, Norrimi Rosaida and Ismail, Mohd Rodzi and Latif, Mohd Talib and Zainordin, Nazatul Syadia (2022) Does light pollution affect nighttime ground-level ozone concentrations? Atmosphere, 13 (11). art. no. 1844. pp. 1-11. ISSN 2073-4433 https://www.mdpi.com/2073-4433/13/11/1844 10.3390/atmos13111844
institution UPM IR
collection UPM IR
description Ground-level ozone (O3) is mainly produced during daytime in the presence of ultraviolet (UV) light and later destroyed by nitrogen oxides during nighttime. However, light pollution caused by the excessive use of artificial lights may disrupt the chemistry of night-time ground-level O3 by providing enough energy to initiate nighttime ground-level O3 production. In this study, nighttime (7 p.m. to 7 a.m.) ground-level O3, nitrogen oxide (NO), and nitrogen dioxides (NO2) concentrations were observed for three years (2013, 2014, and 2015). The existence of O3 was found during nighttime, especially in urban areas with a concentration range of 8–20 ppb. The results suggested that nighttime variations of ground-level O3 concentrations were higher in urban areas than in suburban areas. The mean nighttime O3 concentration at urban sites varied, possibly because the distribution of anthropogenic lights around the urban sites is brighter than in suburban locations, as indicated by the data from the light-pollution map. This anthropogenic light has not caused the suspected nighttime photolysis processes, which directly slowed nighttime oxidation. The photochemistry rate of JNO2/k3 was supposed to be near zero because of the absence of photochemical reactions at night. However, the minimum concentration in all urban and suburban sites ranged from 2–3 ppb, indicating that O3 might also form at night, albeit not due to light pollution.
format Article
author Shith, Syabiha
Ramli, Nor Azam
Awang, Norrimi Rosaida
Ismail, Mohd Rodzi
Latif, Mohd Talib
Zainordin, Nazatul Syadia
spellingShingle Shith, Syabiha
Ramli, Nor Azam
Awang, Norrimi Rosaida
Ismail, Mohd Rodzi
Latif, Mohd Talib
Zainordin, Nazatul Syadia
Does light pollution affect nighttime ground-level ozone concentrations?
author_facet Shith, Syabiha
Ramli, Nor Azam
Awang, Norrimi Rosaida
Ismail, Mohd Rodzi
Latif, Mohd Talib
Zainordin, Nazatul Syadia
author_sort Shith, Syabiha
title Does light pollution affect nighttime ground-level ozone concentrations?
title_short Does light pollution affect nighttime ground-level ozone concentrations?
title_full Does light pollution affect nighttime ground-level ozone concentrations?
title_fullStr Does light pollution affect nighttime ground-level ozone concentrations?
title_full_unstemmed Does light pollution affect nighttime ground-level ozone concentrations?
title_sort does light pollution affect nighttime ground-level ozone concentrations?
publisher MDPI
publishDate 2022
_version_ 1819301239097131008
score 13.4562235

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