High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand

© 2020 Elsevier Ltd Southeast Asia is one of the major regions of biomass burning in the world. To investigate the light absorption properties of carbonaceous aerosols produced from biomass burning, mass concentrations of PM2.5 and its major chemical compositions were obtained by filter sampling, an...

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Main Authors: Jun Tao, Vanisa Surapipith, Zhiwei Han, Tippawan Prapamontol, Sawaeng Kawichai, Leiming Zhang, Zhisheng Zhang, Yunfei Wu, Jiawei Li, Jie Li, Yihong Yang, Renjian Zhang
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Published: 2020
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spelling th-cmuir.6653943832-704792020-10-14T08:35:21Z High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand Jun Tao Vanisa Surapipith Zhiwei Han Tippawan Prapamontol Sawaeng Kawichai Leiming Zhang Zhisheng Zhang Yunfei Wu Jiawei Li Jie Li Yihong Yang Renjian Zhang Earth and Planetary Sciences Environmental Science © 2020 Elsevier Ltd Southeast Asia is one of the major regions of biomass burning in the world. To investigate the light absorption properties of carbonaceous aerosols produced from biomass burning, mass concentrations of PM2.5 and its major chemical compositions were obtained by filter sampling, and aerosol absorption coefficient (bap) at 370 nm (bap-370nm) and at 880 nm (bap-880nm) were synchronously determined for the sampled filters using a transmissometer in urban Chiang Mai of Northern Thailand during the dry season in 2019. On campaign average, the reconstructed PM2.5 mass from the measured chemical components accounted for 99% of the measured PM2.5 mass, in which organic matters (OM) accounted for 64 ± 10%. Hardwood burning was identified as the dominant source of carbonaceous aerosols. The measured aerosol absorption Ångström exponent (AAE) at 370–880 nm (AAE370–880nm) was 1.71 ± 0.24. Mass absorption efficiency (MAE) of elemental carbon (EC) and organic carbon (OC) was estimated using a multiple linear regression model between bap and mass concentrations of EC and OC, resulting in campaign-average values of 8.11 m2 g−1 and 0.24 m2 g−1 at 880 nm and 21.06 m2 g−1 and 2.57 m2 g−1 at 370 nm, respectively, which were evidently larger than those in other cities worldwide. The contributions of EC to bap in 370–880 nm spectrum region ranged from 49 ± 5% to 79 ± 3%, and those of OC ranged from 51 ± 5% to 21 ± 3%. Results from this study suggested a potentially significant impact of carbonaceous aerosols on direct radiative forcings in the dry season over Southeast Asia and downwind regions. 2020-10-14T08:31:48Z 2020-10-14T08:31:48Z 2020-11-01 Journal 18732844 13522310 2-s2.0-85089537470 10.1016/j.atmosenv.2020.117821 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85089537470&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/70479
institution Chiang Mai University
building Chiang Mai University Library
continent Asia
country Thailand
Thailand
content_provider Chiang Mai University Library
collection CMU Intellectual Repository
topic Earth and Planetary Sciences
Environmental Science
spellingShingle Earth and Planetary Sciences
Environmental Science
Jun Tao
Vanisa Surapipith
Zhiwei Han
Tippawan Prapamontol
Sawaeng Kawichai
Leiming Zhang
Zhisheng Zhang
Yunfei Wu
Jiawei Li
Jie Li
Yihong Yang
Renjian Zhang
High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand
description © 2020 Elsevier Ltd Southeast Asia is one of the major regions of biomass burning in the world. To investigate the light absorption properties of carbonaceous aerosols produced from biomass burning, mass concentrations of PM2.5 and its major chemical compositions were obtained by filter sampling, and aerosol absorption coefficient (bap) at 370 nm (bap-370nm) and at 880 nm (bap-880nm) were synchronously determined for the sampled filters using a transmissometer in urban Chiang Mai of Northern Thailand during the dry season in 2019. On campaign average, the reconstructed PM2.5 mass from the measured chemical components accounted for 99% of the measured PM2.5 mass, in which organic matters (OM) accounted for 64 ± 10%. Hardwood burning was identified as the dominant source of carbonaceous aerosols. The measured aerosol absorption Ångström exponent (AAE) at 370–880 nm (AAE370–880nm) was 1.71 ± 0.24. Mass absorption efficiency (MAE) of elemental carbon (EC) and organic carbon (OC) was estimated using a multiple linear regression model between bap and mass concentrations of EC and OC, resulting in campaign-average values of 8.11 m2 g−1 and 0.24 m2 g−1 at 880 nm and 21.06 m2 g−1 and 2.57 m2 g−1 at 370 nm, respectively, which were evidently larger than those in other cities worldwide. The contributions of EC to bap in 370–880 nm spectrum region ranged from 49 ± 5% to 79 ± 3%, and those of OC ranged from 51 ± 5% to 21 ± 3%. Results from this study suggested a potentially significant impact of carbonaceous aerosols on direct radiative forcings in the dry season over Southeast Asia and downwind regions.
format Journal
author Jun Tao
Vanisa Surapipith
Zhiwei Han
Tippawan Prapamontol
Sawaeng Kawichai
Leiming Zhang
Zhisheng Zhang
Yunfei Wu
Jiawei Li
Jie Li
Yihong Yang
Renjian Zhang
author_facet Jun Tao
Vanisa Surapipith
Zhiwei Han
Tippawan Prapamontol
Sawaeng Kawichai
Leiming Zhang
Zhisheng Zhang
Yunfei Wu
Jiawei Li
Jie Li
Yihong Yang
Renjian Zhang
author_sort Jun Tao
title High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand
title_short High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand
title_full High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand
title_fullStr High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand
title_full_unstemmed High mass absorption efficiency of carbonaceous aerosols during the biomass burning season in Chiang Mai of northern Thailand
title_sort high mass absorption efficiency of carbonaceous aerosols during the biomass burning season in chiang mai of northern thailand
publishDate 2020
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85089537470&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/70479
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