气候变化领域集成服务门户(CCPortal): Molecular characterization of organic aerosols over the Tibetan Plateau: Spatiotemporal variations, sources, and potential implications

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DOI	10.1016/j.envpol.2023.122832
	Molecular characterization of organic aerosols over the Tibetan Plateau: Spatiotemporal variations, sources, and potential implications
	Zheng, Huijun; Wan, Xin; Kang, Shichang; Chen, Pengfei; Li, Quanlian; Maharjan, Linda; Guo, Junming
发表日期	2024
ISSN	0269-7491
EISSN	1873-6424
卷号	340
英文摘要	Organic aerosols have profound and far-reaching influences on the Earth's climate, ecosystems, environmental quality, and public health. Elucidating the precise composition and sources of these aerosols over the Tibetan Plateau, a region highly sensitive to climate change and vulnerable to ecosystems, is critically important. Sixteen organic molecular tracers in aerosols were quantified using solvent extraction-BSTFA derivatization, and GC/MS analysis at six sites over the Tibetan Plateau during 2014 and 2016. Average total tracer concentration was 32.5 +/- 20.1 ng m- 3. The highest levels of biomass burning tracers (anhydrosugars and aromatic acids) were found at southeastern Tibetan Plateau site Yulong (20.8 +/- 21.3 ng m-3) followed by the western site Ngari (13.3 +/- 10.6 ng m-3). Biomass burning tracers decreased from southern sites like Everest (9.50 +/- 10.5 ng m-3) to northern aeras such as Laohugou (2.59 +/- 2.19 ng m-3). Biomass burning tracers peaked in non-monsoon seasons while primary saccharides and sugar alcohols predominated during monsoon months. Using tracer-based methods, biomass burning contributed 0.4%-8.4% of organic carbon over the plateau, with higher non-monsoon contributions (3.6% +/- 3.7%). Backward air mass trajectories and fire spots indicated South Asian biomass burning impacts on organic aerosols at western, southern, and southeastern Tibetan Plateau sites, particularly in non-monsoon periods. Fungal spores and plant debris comprised 0.6%-6.3% and 0.3%-1.2% of organic carbon respectively, with higher monsoon contributions (4.2% +/- 4.7%) of fungal spores. Secondary organic carbon was estimated to contribute substantially (45.5%-73.5%) over the plateau but requires further investigation. These results provide insights into pollution mitigation and the assessments of climate and ecology changes for the Tibetan Plateau.
英文关键词	BIOMASS-BURNING TRACERS; CHEMICAL CHARACTERISTICS; ATMOSPHERIC AEROSOLS; BLACK CARBON; SEASONAL-VARIATIONS; PARTICULATE MATTER; CRYOSPHERIC CHANGE; SOUTHWEST CHINA; MARINE AEROSOLS; 3RD POLE
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001112118200001
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283906
作者单位	Chinese Academy of Sciences; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Zheng, Huijun,Wan, Xin,Kang, Shichang,et al. Molecular characterization of organic aerosols over the Tibetan Plateau: Spatiotemporal variations, sources, and potential implications[J]. 中国科学院青藏高原研究所,2024,340.
APA	Zheng, Huijun.,Wan, Xin.,Kang, Shichang.,Chen, Pengfei.,Li, Quanlian.,...&Guo, Junming.(2024).Molecular characterization of organic aerosols over the Tibetan Plateau: Spatiotemporal variations, sources, and potential implications.ENVIRONMENTAL POLLUTION,340.
MLA	Zheng, Huijun,et al."Molecular characterization of organic aerosols over the Tibetan Plateau: Spatiotemporal variations, sources, and potential implications".ENVIRONMENTAL POLLUTION 340(2024).