| Emission characteristics of atmospheric carbon dioxide in Xi'an, China based on the measurements of CO2 concentration, Delta C-14 and delta C-13 | |
| Wang, Peng1,2,3; Zhou, Weijian1,2,4; Niu, Zhenchuan1,2; Cheng, Peng1,2; Wu, Shugang1,2; Xiong, Xiaohu1,2; Lu, Xuefeng1,2; Du, Hua1,2 | |
| 2018-04-01 | |
| 发表期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 卷号 | 619-620期号:2018页码:1163-1169 |
| 文章类型 | Article |
| 摘要 | Given that cities contributed most of China's CO2 emissions, understanding the emission characteristics of urban atmospheric CO2 is critical for regulating CO2 emissions. Regular observations of atmospheric CO2 concentration, Delta C-14 and delta C-13 values were performed at four different sites in Xi'an, China in 2016 to illustrate the temporal and spatial variations of CO2 emissions and recognize their sources and sinks in urban carbon cycles. We found seasonal variations in CO2 concentration and delta C-13 values, the peak to peak amplitude of which was 80.8 ppm for CO2 concentration and 4.0% for its delta C-13. With regard to the spatial variations, the urban CO2 "dome" effect was the most pronounced during the winter season. The use of Delta C-14 combines with delta C-13 measurements aid in understanding the emission patterns. The results show that in the winter season, emissions from fossil fuel derived CO2 (CO2ff) contributed 61.8 +/- 10.6% and 57.4 +/- 9.7% of the excess CO2 (CO2ex) in urban and suburban areas respectively. Combining with the result of estimated delta C-13 value of fossil fuel (delta C-13(ff) = -24%), which suggest coal burning was the dominant source of fossil fuel emissions. In contrast, the proportions of CO2ff in CO2ex varied more in the summer season than that in the winter season, ranging from 42.3% to N100% with the average contributions of 82.5 +/- 23.8% and 90.0 +/- 24.8%. Given the estimation of delta C-13 value of local sources (delta Cs-13) was -21.9% indicates that the intensively biogenic activities, such as soil respiration and corn growth have significantly impacted urban carbon cycles, and occasionally played a role of carbon sink. (c) 2017 Elsevier B.V. All rights reserved. |
| 关键词 | Atmospheric Co2 Delta C-14 Delta C-13 Sources And Sinks |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| DOI | 10.1016/j.scitotenv.2017.11.125 |
| 关键词[WOS] | FOSSIL-FUEL CO2 ; ISOTOPIC COMPOSITION ; CYCLE RESEARCH ; GHG EMISSIONS ; BLACK CARBON ; URBAN ; CITY ; RADIOCARBON ; UNCERTAINTY ; (CO2)-C-14 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| WOS记录号 | WOS:000424144200118 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ieecas.cn/handle/361006/5235 |
| 专题 | 加速器质谱中心 |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 2.Xian AMS Ctr, Shaanxi Prov Key Lab Accelerator Mass Spectrometr, Xian, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Beijing Normal Univ, Joint Ctr Global Changes Studies JCGCS, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Peng,Zhou, Weijian,Niu, Zhenchuan,et al. Emission characteristics of atmospheric carbon dioxide in Xi'an, China based on the measurements of CO2 concentration, Delta C-14 and delta C-13[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,619-620(2018):1163-1169. |
| APA | Wang, Peng.,Zhou, Weijian.,Niu, Zhenchuan.,Cheng, Peng.,Wu, Shugang.,...&Du, Hua.(2018).Emission characteristics of atmospheric carbon dioxide in Xi'an, China based on the measurements of CO2 concentration, Delta C-14 and delta C-13.SCIENCE OF THE TOTAL ENVIRONMENT,619-620(2018),1163-1169. |
| MLA | Wang, Peng,et al."Emission characteristics of atmospheric carbon dioxide in Xi'an, China based on the measurements of CO2 concentration, Delta C-14 and delta C-13".SCIENCE OF THE TOTAL ENVIRONMENT 619-620.2018(2018):1163-1169. |
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