| Spatio-temporal variability of atmospheric CO2 and its main causes: A case study in Xi'an city, China | |
Wang, Peng1,2; Zhou, Weijian1,2,3,4; Niu, Zhenchuan1,2,3; Xiong, Xiaohu1,2; Wu, Shugang1,2 ; Cheng, Peng1,2; Hou, Yaoyao1,2; Lu, Xuefeng1,2; Du, Hua1,2
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| 通讯作者 | Zhou, Weijian(weijian@loess.llqg.ac.cn) |
| 2021-02-01 | |
| 发表期刊 | ATMOSPHERIC RESEARCH
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| ISSN | 0169-8095 |
| 卷号 | 249页码:9 |
| 摘要 | Cities account for most anthropogenic carbon dioxide (CO2) emissions, and thus play an important role in carbon mitigation. However, the variability of atmospheric CO2 caused by the complex emission sources and topography within city remains a challenge in evaluating urban CO2 emissions. Specifically, the mechanism of spatial and temporal patterns is still unclear at city scale. In this work, we explored the spatial and seasonal patterns of atmospheric CO2 at the city scale in Xi'an and attempted to illustrate the mechanisms of these patterns based on the analysis of CO2 sources and sinks. Using the observed radiocarbon (C-14) in atmospheric CO2 as a tracer, we determined the CO2 emissions from fossil fuel (CO2ff) and the biosphere (CO2bio) in different seasons and city areas. The results showed that CO2ff in urban areas is significantly (p < 0.05) higher than that in suburban areas, and explained 82% and 74% of the spatial differences in winter and summer, respectively. Based on the analysis of delta C-13 of CO2 in the local sources, the depleted delta C-13 of urban site indicated greater influences from traffic or natural gas in the urban area than that in the suburban area. These findings suggest that the spatial differences of atmospheric CO2 are dominated by different emission intensities of fossil fuels between urban and suburban areas. In contrast, the contributions of CO2ff to the seasonal variations of atmospheric CO2 were different between urban and suburban areas, that is CO2ff contributed as much as CO2bio to the seasonal variations of atmospheric CO2 in suburban area, but the contribution increased with the increasing of human activities from suburban to urban area, and accounted for 57% of seasonal variations of atmospheric CO2 in the urban area. In addition, we also found that under the influence of the special topography of Xi'an city, the frequent fluctuations of atmospheric CO2 concentration in winter largely depend on the different wind conditions. |
| 关键词 | City atmospheric CO2 Variability Radiocarbon Mechanisms |
| DOI | 10.1016/j.atmosres.2020.105346 |
| 关键词[WOS] | FOSSIL-FUEL CO2 ; CARBON ISOTOPIC COMPOSITION ; WMO/GAW STATIONS ; DIOXIDE ; EMISSIONS ; PARIS ; (CO2)-C-14 ; MEGACITY ; RATIO ; COMBUSTION |
| 收录类别 | SCI ; SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41730108] ; National Natural Science Foundation of China[41773141] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23010302] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB40000000] ; CAS Light of West China Program[XAB2016B02] |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| 项目资助者 | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; CAS Light of West China Program |
| WOS类目 | Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000596914300004 |
| 出版者 | ELSEVIER SCIENCE INC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/15754 |
| 专题 | 加速器质谱中心 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Zhou, Weijian |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Xian AMS Ctr, Shaanxi Key Lab Accelerator Mass Spectrometry Tec, Xian 710061, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 4.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Peng,Zhou, Weijian,Niu, Zhenchuan,et al. Spatio-temporal variability of atmospheric CO2 and its main causes: A case study in Xi'an city, China[J]. ATMOSPHERIC RESEARCH,2021,249:9. |
| APA | Wang, Peng.,Zhou, Weijian.,Niu, Zhenchuan.,Xiong, Xiaohu.,Wu, Shugang.,...&Du, Hua.(2021).Spatio-temporal variability of atmospheric CO2 and its main causes: A case study in Xi'an city, China.ATMOSPHERIC RESEARCH,249,9. |
| MLA | Wang, Peng,et al."Spatio-temporal variability of atmospheric CO2 and its main causes: A case study in Xi'an city, China".ATMOSPHERIC RESEARCH 249(2021):9. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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