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| DOI | 10.1016/j.envpol.2024.123748 |
| Long-term variations in surface ozone at the Longfengshan Regional Atmosphere Background Station in Northeast China and related influencing factors | |
| 发表日期 | 2024 |
| ISSN | 0269-7491 |
| EISSN | 1873-6424 |
| 起始页码 | 348 |
| 卷号 | 348 |
| 英文摘要 | Surface ozone (O-3) is a crucial air pollutant that affects air quality, human health, agricultural production, and climate change. Studies on long-term O-3 variations and their influencing factors are essential for understanding O-3 pollution and its impact. Here, we conducted an analysis of long-term variations in O-3 during 2006-2022 at the Longfengshan Regional Atmosphere Background Station (LFS; 44.44 degrees N, 127.36 degrees E, 330.5 m a.s.l.) situated on the northeastern edge of the Northeast China Plains. The maximum daily 8-h average (MDA8) O-3 fluctuated substantially, with the annual MDA8 decreasing significantly during 2006-2015 (-0.62 ppb yr(-1), p < 0.05), jumping during 2015-2016 and increasing clearly during 2020-2022. Step multiple linear regression models for MDA8 were obtained using meteorological variables, to decompose anthropogenic and meteorological contributions to O-3 variations. Anthropogenic activities acted as the primary drivers of the long-term trends of MDA8 O-3, contributing 73% of annual MDA8 O-3 variability, whereas meteorology played less important roles (27%). Elevated O-3 at LFS were primarily associated with airflows originating from the North China Plain, Northeast China Plain, and coastal areas of North China, primarily occurring during the warm months (May-October). Based on satellite products of NO2 and HCHO columns, the O-3 photochemical regimes over LFS revealed NOx-limited throughout the period. NO2 increased first, reaching peak in 2011, followed by substantial decrease; while HCHO exhibited significant increase, contributing to decreasing trend in MDA8 O-3 during 2006-2015. The plateauing NO2 and decreasing HCHO may contribute to the increase in MDA8 O-3 in 2016. Subsequently, both NO2 and HCHO exhibited notable fluctuations, leading to significant changes in O-3. The study results fill the gap in the understanding of long-term O-3 trends in high-latitude areas in the Northeast China Plain and offer valuable insights for assessing the impact of O-3 on crop yields, forest productivity, and climate change. |
| 英文关键词 | Background ozone; Northeast China; Long-term trend; Influencing factors |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:001215619300001 |
| 来源期刊 | ENVIRONMENTAL POLLUTION
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/291616 |
| 作者单位 | China Meteorological Administration; Chinese Academy of Meteorological Sciences (CAMS); Fudan University |
| 推荐引用方式 GB/T 7714 | . Long-term variations in surface ozone at the Longfengshan Regional Atmosphere Background Station in Northeast China and related influencing factors[J],2024,348. |
| APA | (2024).Long-term variations in surface ozone at the Longfengshan Regional Atmosphere Background Station in Northeast China and related influencing factors.ENVIRONMENTAL POLLUTION,348. |
| MLA | "Long-term variations in surface ozone at the Longfengshan Regional Atmosphere Background Station in Northeast China and related influencing factors".ENVIRONMENTAL POLLUTION 348(2024). |
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