Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization
Abstract Northern Thailand has long been severely affected by haze from biomass burning containing fine and ultrafine aerosols in the dry period. The carbonaceous PM0.1 comprising elemental carbon (EC) and organic carbon (OC) collected during the haze and non-haze periods in Chiang Mai, Thailand was...
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| Format: | Article |
| Language: | English |
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Springer
2021-08-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.210069 |
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| author | Chaiyoth Sresawasd Thaneeya Chetiyanukornkul Phuchiwan Suriyawong Surajit Tekasakul Masami Furuuchi Mitsuhiko Hata Rachane Malinee Perapong Tekasakul Racha Dejchanchaiwong |
| author_facet | Chaiyoth Sresawasd Thaneeya Chetiyanukornkul Phuchiwan Suriyawong Surajit Tekasakul Masami Furuuchi Mitsuhiko Hata Rachane Malinee Perapong Tekasakul Racha Dejchanchaiwong |
| author_sort | Chaiyoth Sresawasd |
| collection | DOAJ |
| description | Abstract Northern Thailand has long been severely affected by haze from biomass burning containing fine and ultrafine aerosols in the dry period. The carbonaceous PM0.1 comprising elemental carbon (EC) and organic carbon (OC) collected during the haze and non-haze periods in Chiang Mai, Thailand was investigated. The PM0.1 levels during the haze periods were about 3 times higher than the non-haze periods, a significant increase. PM0.1 concentration was strongly correlated with atmospheric relative humidity and the number of forest fire hotspots. Carbonaceous aerosol characteristics in PM0.1 were analyzed with the thermal/optical transmittance (TOT) method following the IMPROVE protocol. The concentrations of OC and EC, distribution of OC and EC and OC/EC ratios in PM0.1 were evaluated. Average OC and EC mass concentrations in PM0.1 were 6.8 ± 2.7 and 1.4 ± 0.5 µg m−3 during the haze periods, significantly higher than those during the non-haze periods; 1.9 ± 0.9 and 0.5 ± 0.2 µg m−3. The OC/EC ratio increased linearly with the number of hotspots. This indicated significant contribution from biomass burning to the PM0.1. This was strongly supported by the 48-hr backward trajectory simulation, that indicated both domestic and transboundary aerosol transports. Because both organic and elemental carbon are the light-absorbing carbonaceous aerosols, the increase during the haze periods contributed to regional air quality and climate. This study enhances the understanding of PM0.1 behavior in Chiang Mai, Thailand, during the haze periods in upper southeast Asia. |
| format | Article |
| id | doaj-art-6fc50413aec84e8da564622b354806c7 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2021-08-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-6fc50413aec84e8da564622b354806c72025-02-09T12:20:33ZengSpringerAerosol and Air Quality Research1680-85842071-14092021-08-01211111610.4209/aaqr.210069Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol CharacterizationChaiyoth Sresawasd0Thaneeya Chetiyanukornkul1Phuchiwan Suriyawong2Surajit Tekasakul3Masami Furuuchi4Mitsuhiko Hata5Rachane Malinee6Perapong Tekasakul7Racha Dejchanchaiwong8Air Pollution and Health Effect Research Center, Prince of Songkla UniversityDepartment of Biology, Faculty of Science, Chiang Mai UniversityDepartment of Biology, Faculty of Science, Chiang Mai UniversityDepartment of Chemistry, Faculty of Science, Prince of Songkla UniversityFaculty of Geoscience and Civil Engineering, Institute of Science and Engineering, Kanazawa UniversityFaculty of Geoscience and Civil Engineering, Institute of Science and Engineering, Kanazawa UniversityAir Pollution and Health Effect Research Center, Prince of Songkla UniversityAir Pollution and Health Effect Research Center, Prince of Songkla UniversityAir Pollution and Health Effect Research Center, Prince of Songkla UniversityAbstract Northern Thailand has long been severely affected by haze from biomass burning containing fine and ultrafine aerosols in the dry period. The carbonaceous PM0.1 comprising elemental carbon (EC) and organic carbon (OC) collected during the haze and non-haze periods in Chiang Mai, Thailand was investigated. The PM0.1 levels during the haze periods were about 3 times higher than the non-haze periods, a significant increase. PM0.1 concentration was strongly correlated with atmospheric relative humidity and the number of forest fire hotspots. Carbonaceous aerosol characteristics in PM0.1 were analyzed with the thermal/optical transmittance (TOT) method following the IMPROVE protocol. The concentrations of OC and EC, distribution of OC and EC and OC/EC ratios in PM0.1 were evaluated. Average OC and EC mass concentrations in PM0.1 were 6.8 ± 2.7 and 1.4 ± 0.5 µg m−3 during the haze periods, significantly higher than those during the non-haze periods; 1.9 ± 0.9 and 0.5 ± 0.2 µg m−3. The OC/EC ratio increased linearly with the number of hotspots. This indicated significant contribution from biomass burning to the PM0.1. This was strongly supported by the 48-hr backward trajectory simulation, that indicated both domestic and transboundary aerosol transports. Because both organic and elemental carbon are the light-absorbing carbonaceous aerosols, the increase during the haze periods contributed to regional air quality and climate. This study enhances the understanding of PM0.1 behavior in Chiang Mai, Thailand, during the haze periods in upper southeast Asia.https://doi.org/10.4209/aaqr.210069Ultrafine particlesCarbonaceous aerosolsForest fireSource identificationASEAN haze |
| spellingShingle | Chaiyoth Sresawasd Thaneeya Chetiyanukornkul Phuchiwan Suriyawong Surajit Tekasakul Masami Furuuchi Mitsuhiko Hata Rachane Malinee Perapong Tekasakul Racha Dejchanchaiwong Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization Aerosol and Air Quality Research Ultrafine particles Carbonaceous aerosols Forest fire Source identification ASEAN haze |
| title | Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization |
| title_full | Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization |
| title_fullStr | Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization |
| title_full_unstemmed | Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization |
| title_short | Influence of Meteorological Conditions and Fire Hotspots on PM0.1 in Northern Thailand during Strong Haze Episodes and Carbonaceous Aerosol Characterization |
| title_sort | influence of meteorological conditions and fire hotspots on pm0 1 in northern thailand during strong haze episodes and carbonaceous aerosol characterization |
| topic | Ultrafine particles Carbonaceous aerosols Forest fire Source identification ASEAN haze |
| url | https://doi.org/10.4209/aaqr.210069 |
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