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| DOI | 10.1016/j.scitotenv.2024.172262 |
| South and Southeast Asia controls black carbon characteristics of Meili Snow Mountains in southeast Tibetan Plateau | |
| 发表日期 | 2024 |
| ISSN | 0048-9697 |
| EISSN | 1879-1026 |
| 起始页码 | 927 |
| 卷号 | 927 |
| 英文摘要 | South and Southeast Asia (SSA) emitted black carbon (BC) exerts potential effects on glacier and snow melting and regional climate change in the Tibetan Plateau. In this study, online BC measurements were conducted for 1 year at a remote village located at the terminus of the Mingyong Glacier below the Meili Snow Mountains. The Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) was used to investigate the contribution and potential effect of SSA -emitted BC. In addition, variations in the light absorption characteristics of BC and brown carbon (BrC) were examined. The results indicated that the annual mean concentration of BC was 415 +/- 372 ngm(-3) , with the highest concentration observed in April (monthly mean: 930 +/- 484 ngm(-3) ). BC exhibited a similar diurnal variation throughout the year, with two peaks observed in the morning (from 8:00 to 9:00 AM) and in the afternoon (from 4:00 to 5:00 PM), with even lower values at nighttime. At a short wavelength of 370 nm, the absorption coefficient ( b abs ) reached its maximum value, and the majority of b abs values were < 20 Mm(-1) , indicating that the atmosphere was not overloaded with BC. At the same wavelength, BrC substantially contributed to b abs , with an annual mean of 25.2 % +/- 12.8 %. SSA was the largest contributor of BC (annual mean: 51.1 %) in the study area, particularly in spring (65.6 %). However, its contributions reached 20.2 % in summer, indicating non -negligible emissions from activities in other regions. In the atmosphere, the SSA BC -induced radiative forcing (RF) over the study region was positive. While at the near surface, the RF exhibited a significant seasonal variation, with the larger RF values occurring in winter and spring. Overall, our findings highlight the importance of controlling BC emissions from SSA to protect the Tibetan Plateau against pollution -related glacier and snow cover melting. |
| 英文关键词 | Black carbon; Brown carbon; Light absorption; Source; Long-range transport; Meili Snow Mountains |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:001230476400001 |
| 来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/304821 |
| 作者单位 | Chinese Academy of Sciences; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS |
| 推荐引用方式 GB/T 7714 | . South and Southeast Asia controls black carbon characteristics of Meili Snow Mountains in southeast Tibetan Plateau[J],2024,927. |
| APA | (2024).South and Southeast Asia controls black carbon characteristics of Meili Snow Mountains in southeast Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,927. |
| MLA | "South and Southeast Asia controls black carbon characteristics of Meili Snow Mountains in southeast Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 927(2024). |
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