气候变化领域集成服务门户(CCPortal): Biomass Burning Greatly Enhances the Concentration of Fine Carbonaceous Aerosols at an Urban Area in Upper Northern Thailand: Evidence From the Radiocarbon-Based Source Apportionment on Size-Resolved Aerosols

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DOI	10.1029/2023JD040692
	Biomass Burning Greatly Enhances the Concentration of Fine Carbonaceous Aerosols at an Urban Area in Upper Northern Thailand: Evidence From the Radiocarbon-Based Source Apportionment on Size-Resolved Aerosols
	Song, Wenhuai; Hong, Yihang; Zhang, Yuxian; Cao, Fang; Rauber, Martin; Santijitpakdee, Teetawat; Kawichai, Sawaeng; Prapamontol, Tippawan; Szidat, Sonke; Zhang, Yan-Lin
发表日期	2024
ISSN	2169-897X
EISSN	2169-8996
起始页码	129
结束页码	10
卷号	129 期号:10
英文摘要	To study the role of biomass burning (BB) in air pollution at upper-northern Thailand, the source apportionment of size-resolved carbonaceous aerosols from Chiang Mai was carried out based on the radiocarbon (14C) analysis. The fraction of modern carbon (F14C) was generally decreased with particle size increasing and with the highest and lowest values of 0.90 +/- 0.04 and 0.61 +/- 0.04, respectively. Elemental carbon, regardless of emission sources, and BB-derived organic carbon (OCbb) showed unimodal size distribution patterns with peaks at 0.43-0.65 mu m. Fossil-fuel derived-OC (OCf) displayed a bimodal mode with the major peak at 2.1-10 mu m, and the minor one at 0.43-0.65 mu m. The biogenic secondary organic aerosols (BSOA) showed a typical fine-mode unimodal size distribution pattern during the high BB (HBB) season, and a bimodal mode during the low BB season. The BSOA concentration increased by 189% +/- 80% due to the interaction with open BB plums during HBB season, which was quantified by a 14C-involved random forest model. Besides, the concentration of biogenic primary organic aerosols also showed a significant increment during the HBB season, especially in sub-microns. Our results highlight the critical importance of controlling open fires to reduce air pollutants and the potential exposure risk. Large-scale biomass burning (BB) activities take place annually in Southeast Asia. BB can emit large amounts of carbonaceous aerosols (CA) thus affecting human health and causing climate change. The particle size, directly affects how deep the particle can penetrate the human body, can be significantly changed by BB. In this study, BB-derived CA contributed the most to the total concentration of CA. The concentration of BB-derived CA in PM10 (particles with an aerodynamic diameter of less than 10 mu m) was 12 times higher in high BB (HBB) season than in low BB (LBB) season. More specifically, BB-derived CA in fine (PM1.1) and coarse (PM1.1-10) particles increased by roughly 13 and 5 times in HBB season compared to LBB season, respectively. Besides, BB enhanced the concentration of biogenic secondary organic aerosols by 180%, wherein 65% of the increment was allocated in PM1.1. Our results indicated that BB can not only emit particles or precursors of aerosol particles but also promote the generation of biogenic aerosols. And BB significantly enhanced the loading of CA, particularly in fine particles. Fossil-derived carbonaceous aerosols (CA) showed a bimodal mode size distribution pattern Non-fossil-derived CA showed a typical fine-mode unimodal size distribution pattern Biomass burning greatly enhanced the production of biogenic secondary organic aerosols particularly in fine aerosols
英文关键词	biomass burning; machine learning; carbonaceous aerosol; size-resolved samples; radiocarbon; Southeast Asia
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001223035000001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306614
作者单位	Nanjing University of Information Science & Technology; Nanjing University of Information Science & Technology; Nanjing University of Information Science & Technology; University of Bern; University of Bern; Chiang Mai University
推荐引用方式 GB/T 7714	Song, Wenhuai,Hong, Yihang,Zhang, Yuxian,et al. Biomass Burning Greatly Enhances the Concentration of Fine Carbonaceous Aerosols at an Urban Area in Upper Northern Thailand: Evidence From the Radiocarbon-Based Source Apportionment on Size-Resolved Aerosols[J],2024,129(10).
APA	Song, Wenhuai.,Hong, Yihang.,Zhang, Yuxian.,Cao, Fang.,Rauber, Martin.,...&Zhang, Yan-Lin.(2024).Biomass Burning Greatly Enhances the Concentration of Fine Carbonaceous Aerosols at an Urban Area in Upper Northern Thailand: Evidence From the Radiocarbon-Based Source Apportionment on Size-Resolved Aerosols.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,129(10).
MLA	Song, Wenhuai,et al."Biomass Burning Greatly Enhances the Concentration of Fine Carbonaceous Aerosols at an Urban Area in Upper Northern Thailand: Evidence From the Radiocarbon-Based Source Apportionment on Size-Resolved Aerosols".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 129.10(2024).