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Isotope constraints of the strong influence of biomass burning to climate-forcing Black Carbon aerosols over Southeast Asia

Liu, Junwen (author)
Stockholms universitet,Institutionen för miljövetenskap,Jinan University, China; Chinese Academy of Sciences, China
Andersson, August (author)
Stockholms universitet,Institutionen för miljövetenskap
Zhong, Guangcai (author)
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Geng, Xiaofei (author)
Ding, Ping (author)
Zhu, Sanyuan (author)
Cheng, Zhineng (author)
Pauzi Zakaria, Mohamad (author)
Bong, Chui Wei (author)
Li, Jun (author)
Zheng, Junyu (author)
Zhang, Gan (author)
Gustafsson, Örjan (author)
Stockholms universitet,Institutionen för miljövetenskap
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 (creator_code:org_t)
Elsevier BV, 2020
2020
English.
In: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 744
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Black Carbon (BC) deteriorates air quality and contributes to climate warming, yet its regionally- and seasonally-varying emission sources are poorly constrained. Here we employ natural abundance radiocarbon (C-14) measurements of BC intercepted at a northern Malaysia regional receptor site, Bachok, to quantify the relative biomass vs. fossil source contributions of atmospheric BC, in a first year-round study for SE Asia (December 2015-December 2016). The annual average C-14 signature suggests as large contributions from biomass burning as from fossil fuel combustion. This is similar to findings from analogous measurements at S Asian receptors sites (similar to 50% biomass burning), while E Asia sites are dominated by fossil emission (similar to 20% biomass burning). The C-14-based source fingerprinting of BC in the dry spring season in SE Asia signals an even more elevated biomass burning contribution (similar to 70% or even higher), presumably from forest, shrub and agricultural fires. This is consistent with this period showing also elevated ratio of organic carbon to BC (up from similar to 5 to 30) and estimates of BC emissions from satellite fire data. Hence, the present study emphasizes the importance of mitigating dry season vegetation fires in SE Asia.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Keyword

Black Carbon
Radiocarbon
Biomass burning
SE Asia

Publication and Content Type

ref (subject category)
art (subject category)

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