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| DOI | 10.1029/2023JD040578 |
| An Approach for Assessing Human Respiration CO2 Emissions Using Radiocarbon Measurements and Bottom-Up Data Sets | |
| 发表日期 | 2024 |
| ISSN | 2169-897X |
| EISSN | 2169-8996 |
| 起始页码 | 129 |
| 结束页码 | 9 |
| 卷号 | 129期号:9 |
| 英文摘要 | Carbon dioxide (CO2) is a major greenhouse gas in the atmosphere and has large impacts on climate change. Its fossil fuel (CO2ff) and biogenic (CO2bio) sources are well investigated, while CO2 emissions from human respiration (CO2hr), a subset of CO2bio, have received less attention. Especially as a source of carbon emissions in densely populated megacities, the role of CO2hr emissions in the carbon cycles was largely neglected. Here we fully characterize the respiratory CO2 emission rates (CERs) of Chinese people for the first time. Using the example of the megacity Beijing in China, we estimate the CO2hr emissions and present a method for quantifying its fraction in the atmospheric CO2 based on radiocarbon (C-14) measurements and inventory data sets. The results show that males and females have similar age trends in CERs, but the gender difference is significant, especially between the ages of 20 and 60, the average CERs was 33% higher for males than for females (P < 0.05). The CO2hr emissions were about 22.2 +/- 0.6 kt CO2 per day, which was equivalent to 7.5% of daily CO2ff emissions in winter. The proportion is likely to be twice in summer due to the seasonal fluctuations of fossil fuel emissions. More importantly, the respiratory emissions could increase atmospheric CO2 concentration by about 2 ppm, accounting for 14% +/- 6% of average CO2bio concentration in winter. This study highlights the importance of human respiration in carbon emissions in megacities and has implications for a better understanding of the regional carbon budget. |
| 英文关键词 | human respiration; carbon dioxide; radiocarbon; megacity; bottom up; fossil fuel |
| 语种 | 英语 |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:001215959500001 |
| 来源期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/301314 |
| 作者单位 | Chinese Academy of Sciences; Institute of Earth Environment, CAS; Xi'an Jiaotong University; Tsinghua University; University of Toronto; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | . An Approach for Assessing Human Respiration CO2 Emissions Using Radiocarbon Measurements and Bottom-Up Data Sets[J],2024,129(9). |
| APA | (2024).An Approach for Assessing Human Respiration CO2 Emissions Using Radiocarbon Measurements and Bottom-Up Data Sets.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,129(9). |
| MLA | "An Approach for Assessing Human Respiration CO2 Emissions Using Radiocarbon Measurements and Bottom-Up Data Sets".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 129.9(2024). |
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