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The madden-julian oscillation modulates the air quality in the maritime continent

Air quality in the Maritime Continent, which worsens particularly during peatland fire periods, causes climate and environmental concerns. The occurrence of peatland fire haze has been related to the interannual variations of the El Nino-Southern Oscillation, Indian Ocean Dipole, and inter-seasonal...

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Main Authors: Kuwata, Mikinori, Miyakawa, Takuma, Yokoi, Satoru, Khan, Md Firoz, Latif, Mohd Talib
Format: Article
Published: Amer Geophysical Union 2021
Subjects:
Q Science (General)
QD Chemistry
Online Access:http://eprints.um.edu.my/28134/
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spelling my.um.eprints.281342022-07-25T04:49:16Z http://eprints.um.edu.my/28134/ The madden-julian oscillation modulates the air quality in the maritime continent Kuwata, Mikinori Miyakawa, Takuma Yokoi, Satoru Khan, Md Firoz Latif, Mohd Talib Q Science (General) QD Chemistry Air quality in the Maritime Continent, which worsens particularly during peatland fire periods, causes climate and environmental concerns. The occurrence of peatland fire haze has been related to the interannual variations of the El Nino-Southern Oscillation, Indian Ocean Dipole, and inter-seasonal monsoon cycle. However, the factors affecting the region's air quality on subseasonal timescales have not been clearly identified. We investigated the role of the Madden-Julian Oscillation (MJO), which has a 30-90-day cycle, in air quality using a long-term observation data set from Malaysia. The results show that in MJO Phase 3, during which the region is covered by convective clouds, only accounted for 4 +/- 2% of high PM10 concentration days (daily average PM10 concentration at site X > average + standard deviation of daily average PM10 concentration at site X) among all active MJO periods. In contrast, the corresponding values were considerably higher in MJO Phases 1 and 5-8. The MJO also modulated CO and ozone concentrations. This study shows that the MJO influences air quality during both fire and non-fire seasons, demonstrating that variations in wildfire activity are not the only cause of air quality changes. Other factors, such as precipitation, also need to be considered to better understand the relationship between the MJO and air quality. Amer Geophysical Union 2021-07 Article PeerReviewed Kuwata, Mikinori and Miyakawa, Takuma and Yokoi, Satoru and Khan, Md Firoz and Latif, Mohd Talib (2021) The madden-julian oscillation modulates the air quality in the maritime continent. Earth And Space Science, 8 (7). ISSN 2333-5084, DOI https://doi.org/10.1029/2021EA001708 <https://doi.org/10.1029/2021EA001708>. 10.1029/2021EA001708
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QD Chemistry
spellingShingle Q Science (General)
QD Chemistry
Kuwata, Mikinori
Miyakawa, Takuma
Yokoi, Satoru
Khan, Md Firoz
Latif, Mohd Talib
The madden-julian oscillation modulates the air quality in the maritime continent
description Air quality in the Maritime Continent, which worsens particularly during peatland fire periods, causes climate and environmental concerns. The occurrence of peatland fire haze has been related to the interannual variations of the El Nino-Southern Oscillation, Indian Ocean Dipole, and inter-seasonal monsoon cycle. However, the factors affecting the region's air quality on subseasonal timescales have not been clearly identified. We investigated the role of the Madden-Julian Oscillation (MJO), which has a 30-90-day cycle, in air quality using a long-term observation data set from Malaysia. The results show that in MJO Phase 3, during which the region is covered by convective clouds, only accounted for 4 +/- 2% of high PM10 concentration days (daily average PM10 concentration at site X > average + standard deviation of daily average PM10 concentration at site X) among all active MJO periods. In contrast, the corresponding values were considerably higher in MJO Phases 1 and 5-8. The MJO also modulated CO and ozone concentrations. This study shows that the MJO influences air quality during both fire and non-fire seasons, demonstrating that variations in wildfire activity are not the only cause of air quality changes. Other factors, such as precipitation, also need to be considered to better understand the relationship between the MJO and air quality.
format Article
author Kuwata, Mikinori
Miyakawa, Takuma
Yokoi, Satoru
Khan, Md Firoz
Latif, Mohd Talib
author_facet Kuwata, Mikinori
Miyakawa, Takuma
Yokoi, Satoru
Khan, Md Firoz
Latif, Mohd Talib
author_sort Kuwata, Mikinori
title The madden-julian oscillation modulates the air quality in the maritime continent
title_short The madden-julian oscillation modulates the air quality in the maritime continent
title_full The madden-julian oscillation modulates the air quality in the maritime continent
title_fullStr The madden-julian oscillation modulates the air quality in the maritime continent
title_full_unstemmed The madden-julian oscillation modulates the air quality in the maritime continent
title_sort madden-julian oscillation modulates the air quality in the maritime continent
publisher Amer Geophysical Union
publishDate 2021
url http://eprints.um.edu.my/28134/
_version_ 1739828440944607232
score 13.211869

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