Carbon neutrality research hotspots and evolution trend: Based on the scientific knowledge map
Received date: 2021-10-18
Revised date: 2022-03-29
Online published: 2022-06-25
Carbon neutrality is an important issue in addressing global environmental problems, promoting national economic development, and facilitating sustainable social development. This study used the CiteSpace software to analyze the keywords and research hotspots of 7192 English publications by international scholars and 3778 Chinese and English publications by Chinese scholars in the Web of Science and the China National Knowledge Infrastructure (CNKI) from 1991 to 2021. It revealed the current status and development trend of carbon neutrality research in China and abroad from the aspects of temporal distribution, spatial distribution, keyword co-occurrence map, and keyword clustering map. The results show that: (1) Temporally, carbon neutrality research in China and abroad can be divided into three stages: the emerging period from 1991 to 2006, the development period from 2007 to 2014, and the prosperous period from 2015 to 2021. In the twenty-first century, the number of carbon neutrality-related publications has shown a rapid growth trend, and carbon neutrality research in China showed an explosive growth in 2021, with an annual publication volume exceeding 1500. (2) Spatially, carbon neutrality research areas and research institutions have shown a trend of multi-polarization development. Countries such as the United States, China, and the United Kingdom publish a relatively large number of papers, which are mainly dominated by universities and research institutes. (3) From the perspective of research hotspots, carbon neutrality research focuses on three major scientific issues of basic research and dynamic monitoring and evaluation, technology development and application, and policy design and roadmaps. Carbon footprint, energy, carbon capture and storage technology, life cycle assessment, carbon trading market, and global governance are important research hotspots. (4) From the perspective of keyword clustering, carbon neutrality research can be clustered into four topics from the individual, industry, and country levels: individual attitude and behavior toward carbon neutrality, carbon neutrality technology, carbon market and carbon financial system, and policy guidance and global governance. This study examined the connotation and research status of each topic, and summarized the hotspots and trend of change of carbon neutrality research to provide theoretical and practical help for China to achieve the carbon neutrality goals.
YUE Ting , LI Mengting , CHEN Hong , LONG Ruyin , WANG Yujie . Carbon neutrality research hotspots and evolution trend: Based on the scientific knowledge map[J]. Resources Science, 2022 , 44(4) : 701 -715 . DOI: 10.18402/resci.2022.04.05
表1 碳中和研究发文期刊数量Table 1 The number of publications on carbon neutrality research |
| 排名 | 来源出版物 | 数量 | 占比/% |
|---|---|---|---|
| 1 | Journal of Cleaner Production | 995 | 11.13 |
| 2 | Sustainability | 411 | 4.59 |
| 3 | Applied Energy | 208 | 2.32 |
| 4 | Energies | 195 | 2.18 |
| 5 | Science of the Total Environment | 187 | 2.09 |
| 6 | International Journal of Life Cycle Assessment | 154 | 1.72 |
| 7 | Journal of Environment Management | 138 | 1.54 |
| 8 | Energy | 128 | 1.43 |
| 9 | Resources Conservation and Recycling | 114 | 1.27 |
| 10 | Construction and Building Materials | 112 | 1.25 |
表2 世界各国碳中和目标时间表Table 2 Timeline of carbon neutrality targets for countries around the world |
| 进展情况 | 实现目标时间 | 国家和地区 |
|---|---|---|
| 已立法 | 2045年 | 德国、瑞典、葡萄牙 |
| 2050年 | 日本、法国、英国、韩国、加拿大、西班牙、爱尔兰、丹麦、匈牙利、新西兰、欧盟 | |
| 已颁布政策文件 | 2030年 | 马尔代夫、巴巴多斯 |
| 2035年 | 芬兰 | |
| 2040年 | 奥地利、冰岛、安提瓜、巴布达 | |
| 2050年 | 美国、意大利、智利、希腊、巴拿马、克罗地亚、立陶宛、哥斯达黎加、斯洛文尼亚、乌拉圭、卢森堡等 | |
| 2060年 | 中国、巴西、乌克兰、斯里兰卡 | |
| 已声明或已承诺 | 2050年 | 澳大利亚、泰国、马来西亚、越南、南非、阿拉伯联合酋长国、哈萨克斯坦、以色列、爱沙尼亚、安道尔 |
| 2060年 | 俄罗斯联邦、沙特阿拉伯、尼日利亚、巴林 | |
| 2070年 | 印度 | |
| 已提议或讨论中 | 2030年 | 孟加拉国、南苏丹 |
| 2045年 | 尼泊尔 | |
| 2050年 | 巴基斯坦、阿根廷、哥伦比亚、瑞士、比利时、秘鲁、埃塞俄比亚、缅甸、安哥拉、苏丹、斯洛伐克等 | |
| 2060年 | 印度尼西亚 |
表3 国际与中国碳中和研究关键词统计Table 3 International and Chinese carbon neutrality research keywords statistics |
| 排名 | 频次 | 关键词(国际研究) | 中心性 | 年份 | 频次 | 关键词(中国研究) | 中心性 | 年份 | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2188 | carbon footprint | 0.03 | 2007 | 486 | 碳足迹 | 0.10 | 2010 | |
| 2 | 1161 | life cycle assessment | 0.01 | 2008 | 186 | 影响 | 0.05 | 2011 | |
| 3 | 718 | greenhouse gas emission | 0.01 | 2010 | 173 | 生命周期评价 | 0.04 | 2012 | |
| 4 | 628 | impact | 0.01 | 2010 | 171 | 能源 | 0.14 | 2009 | |
| 5 | 612 | energy | 0.01 | 1995 | 168 | CO2排放 | 0.09 | 2011 | |
| 6 | 582 | emission | 0.02 | 2002 | 161 | 温室气体排放 | 0.05 | 2014 | |
| 7 | 576 | system | 0.01 | 2008 | 156 | 排放 | 0.06 | 2012 | |
| 8 | 543 | climate change | 0.03 | 2003 | 134 | 系统 | 0.02 | 2013 | |
| 9 | 520 | performance | 0.01 | 2009 | 132 | 表现 | 0.10 | 2013 | |
| 10 | 501 | environmental impact | 0.01 | 2008 | 123 | 消费 | 0.04 | 2011 | |
| 11 | 398 | consumption | 0.01 | 2008 | 119 | 能源消费 | 0.03 | 2006 | |
| 12 | 379 | management | 0.01 | 2011 | 119 | 模型 | 0.04 | 2013 | |
| 13 | 369 | model | 0.04 | 2003 | 112 | 中国 | 0.05 | 2006 | |
| 14 | 261 | CO2 emission | 0.02 | 2009 | 97 | 管理 | 0.08 | 2012 | |
| 15 | 247 | sustainability | 0.03 | 2009 | 88 | 气候变化 | 0.09 | 2006 |
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