研究目的:以Web of Science数据库收录的20022015年期间发表的土地利用与碳排放相关研究主题文献进行文献共被引网络、关键词共现网络及突现词分析,厘清国外土地利用与碳排放知识图谱进展。研究方法:文献计量分析法,归纳法。研究结果:植被碳和土壤碳的测算、土壤碳排放、森林采伐碳排放、交互作用引致碳排放和生物燃料等成为国外相关研究主要知识群组,不同知识群组之间呈现交叉影响的演化;研究主题集聚成4条核心路径:土地利用变化与土壤碳排放,气候变化模型与生态系统,热带雨林森林采伐与森林退化(REDD)碳排放,生物燃料生命周期模型; REDD和生物燃料利弊成为国外研究前沿和研究热点。研究结论:国外土地利用与碳排放研究已完成了基础理论和研究体系的架构,表现出学科交叉性强,研究基础理论丰富,研究主题从微观到中观到宏观层层递进的演化关系特点。
英文摘要:
The purposes of this paper is to use the co-citation network, the co-occurrence network of key words and the emergent words analysis to analyze the evolvement of related topics by means of information visualization based on literature concerning land use and carbon emissions published in the database of "Web of Science" from 2002 to 2015. The employed methods are bibliometric analysis and induction analysis. The results reveal that the study on carbon stock estimation from vegetation and soil, emissions from soil, emissions from deforestation, committed carbon emission from interaction, and emissions biofuel form the main knowledge groups of foreign land use and carbon emission research, presenting the evolution of the inter-influence among different knowledge groups; the research themes cluster into four core evolution routes: "land-use change and soil carbon emissions", "climate change models and ecosystems", "carbon emissions from tropical rainforest deforestation and forest degradation", "biofuels life cycle models"; "Reduce Emissions from Deforestation and Forest Degradation" and "pros and cons analysis of biofuel" are the current advanced and focal topics. Finally, we conclude that foreign research on land use" and carbon emissions" has already completed the basic theories and research system construction, showing the features of strong subject overlapping, rich theoretical foundation, progressive evaluation relationship of research topics from microscopic level to mesoscopic level and to macroscopic level.