Local and transboundary factors’ impacts on trace gases and aerosol during haze episode in 2015 El Niño in Malaysia

Nur Adilla Che Samsuddin, Firoz Khan, Khairul Nizam Abdul Maulud, Ahmad Hazuwan Hamid, Fahia Tarannum Munna, Muhammad Aizat Ab Rahim, Mohd Talib Latif, Md. Akhtaruzzaman

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Southeast Asian haze is a semi-natural phenomenon that chokes the region each year during the dry monsoon season. Smoke-haze episodes caused by the vegetation and peat fires in Indonesia severely affected large parts of Malaysia during the 2015 El Niño phenomenon. This study aimed to evaluate the factors that influenced the concentrations of aerosol and trace gases during the 2015 haze and non-haze period on a semi-urban site in the southern part of Malaysian peninsula that facing Sumatra (Muar, Site A), and on an urban site near to Kuala Lumpur, influenced by the city centre (Cheras, Site B). Local land use data and the cluster of air mass weighted backward trajectory were used to identify the potential factors from local sources and the transboundary region, respectively. The annual median concentrations of PM10 for semi-urban and urban sites were 45.0 μg/m3 and 47.0 μg/m3, respectively for the study period (Jan–Dec 2015) from the hourly observation dataset. The highest PM10 concentrations during the haze were 358 μg/m3 and 415 μg/m3 for the two sites, respectively, representing absolutely unhealthy air. However, the trace gases were within the safe threshold. The average concentrations of PM10 and carbon monoxide were two fold higher during the haze than the non-haze episodes on both sites. Nitrogen dioxide was more influenced by haze compared with sulphur dioxide and ozone. The results of the land use change suggest that the local factor can also partially affect the air pollution on the urban area (Site B) but more visible in 2015. The results of the backward trajectory and the wildfire radiative power showed that the smoke-haze episodes that affected Malaysia in 2015 were mainly initiated in the Indonesian Sumatra and Kalimantan regions. This study provides a very useful information towards the impacted region during El Niño haze episode.

Original languageEnglish
Pages (from-to)1502-1514
Number of pages13
JournalScience of the Total Environment
Volume630
DOIs
Publication statusPublished - 15 Jul 2018

Fingerprint

haze
trace gas
Aerosols
Smoke
Land use
Gases
Trajectories
aerosol
Nitrogen Dioxide
Sulfur Dioxide
Electric inductors
Peat
Ozone
Sulfur dioxide
Carbon Monoxide
Air
Air pollution
Carbon monoxide
urban site
Fires

Keywords

  • El Niño
  • Fire hotspots
  • Haze episode
  • Land use
  • Transport air mass

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Local and transboundary factors’ impacts on trace gases and aerosol during haze episode in 2015 El Niño in Malaysia. / Samsuddin, Nur Adilla Che; Khan, Firoz; Abdul Maulud, Khairul Nizam; Hamid, Ahmad Hazuwan; Munna, Fahia Tarannum; Rahim, Muhammad Aizat Ab; Latif, Mohd Talib; Akhtaruzzaman, Md.

In: Science of the Total Environment, Vol. 630, 15.07.2018, p. 1502-1514.

Research output: Contribution to journalArticle

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AU - Samsuddin, Nur Adilla Che

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AU - Abdul Maulud, Khairul Nizam

AU - Hamid, Ahmad Hazuwan

AU - Munna, Fahia Tarannum

AU - Rahim, Muhammad Aizat Ab

AU - Latif, Mohd Talib

AU - Akhtaruzzaman, Md.

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