Characteristics and Sources of Organic Aerosol in PM 2.5 at Yangbajing in Tibetan Plateau
文献类型：期刊论文
| 作者 | Xiang, Yaxin10,11; Li, Xuwen10,11; Zhang, Tianle10,11; Cheng, Qian2,8,9; Yan, Caiqing3; Liu, Xiaomeng10,11; Liu, Yue4,10,11; Wang, Yinan5; Kang, Shichang6; Ding, Xiang1,2,8,9 |
| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2024-09-15 |
| 卷号 | 333页码:14 |
| 关键词 | Organic speciation Tibetan Plateau Sources Primary organic aerosol Secondary organic aerosol |
| ISSN号 | 1352-2310 |
| DOI | 10.1016/j.atmosenv.2024.120662 |
| 英文摘要 | The climate and environment of the Tibetan Plateau (TP) are sensitive to human activities. As a key component highly influencing global climate and environment, organic aerosol over the TP is investigated in this study, especially in organic composition and its sources. This study aims to explore the composition characteristics, seasonal variation, and potential sources of organic aerosol including two episodes through one-year sampling at the Yangbajing (YBJ) site in the TP. A total of 120 primary and secondary organic species as well as organic carbon (OC) and elemental carbon (EC) were measured in PM2.5. The annual average concentrations of OC, EC, and organic species were 3.12 +/- 3.73 mu gC/m3, 0.28 +/- 0.18 mu gC/m3 and 104 +/- 36.6 ng/m3, respectively. High ratio of OC to EC (OC/EC) and low ratio of fatty acids to n-alkanes were found for aerosol in the TP. The OC/EC ratio was 11.8 +/- 10.2 on average at the YBJ site and strongly correlated with levoglucosan, a tracer for biomass burning, but not so with typical secondary species, indicating that the high ratio of OC/EC over the TP was more influenced by biomass burning than secondary formation. The ratio of fatty acids to n-alkanes at YBJ was 1.39 +/- 0.29 on average, lower than those reported over urban areas (3.13 +/- 1.49), probably owing to less residential cooking activities. Seasonally, the non-monsoon season had significant increases in primary organic aerosol (POA) tracers, among which biomass burning tracers had a higher increase percentage than other specific tracers. On the contrary, the levels of secondary organic aerosol (SOA) tracers, especially isoprene- and monoterpenederived SOA tracers were enhanced in the monsoon season (summer time), largely resulting from high emissions of biogenic volatile organic compounds. Two episodes characterized with much higher concentrations of organic species (1215 and 688 ng/m3) were observed in this study. One was characterized by significant enhancement of POA tracers with the air masses originated from South Asia, and the other showed large increases in SOA and POA tracers with the air masses transported across multiple regions. This study could help to |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001260551600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78324]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Ding, Xiang; Zheng, Mei |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou 510640, Peoples R China 3.Shandong Univ, Environm Res Inst, Qingdao 266237, Peoples R China 4.Natl Inst Metrol China, Ctr Environm Metrol, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Observ, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China 7.Peking Univ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China 8.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China 9.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Prov Key Lab Environm Protect & Resource, Guangzhou 510640, Peoples R China 10.Peking Univ, Coll Environm Sci & Engn, SKL ESPC, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiang, Yaxin,Li, Xuwen,Zhang, Tianle,et al. Characteristics and Sources of Organic Aerosol in PM 2.5 at Yangbajing in Tibetan Plateau[J]. ATMOSPHERIC ENVIRONMENT,2024,333:14. |
| APA | Xiang, Yaxin.,Li, Xuwen.,Zhang, Tianle.,Cheng, Qian.,Yan, Caiqing.,...&Zheng, Mei.(2024).Characteristics and Sources of Organic Aerosol in PM 2.5 at Yangbajing in Tibetan Plateau.ATMOSPHERIC ENVIRONMENT,333,14. |
| MLA | Xiang, Yaxin,et al."Characteristics and Sources of Organic Aerosol in PM 2.5 at Yangbajing in Tibetan Plateau".ATMOSPHERIC ENVIRONMENT 333(2024):14. |
入库方式： OAI收割
来源：广州地球化学研究所
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