基于CiteSpace的陆地生态系统碳水耦合研究现状及趋势

在全球气候变化的背景下,陆地生态系统碳水耦合研究已引起世界各国学者和研究机构的广泛关注。基于Web of Science核心数据库,运用文献数据可视化应用软件CiteSpace对国际上有关陆地生态系统碳水耦合的研究现状进行分析,旨在探究研究热点及趋势,归纳研究主题演进,了解当前国际研究前沿。研究发现:(1)1999—2018年,关于陆地生态系统碳水耦合的研究论文数量呈现快速增加的趋势,后10年的增加速度快于前10年;形成了以Black TA、Yu GR、Chen JQ为主的核心作者群;中国科学院、中国科学院大学、美国林业局、加州大学伯克利分校、俄勒冈州立大学等发文数量居前的研究机构。(2)从共被引期刊和研究领域可以看出,陆地生态系统碳水耦合研究涉及环境科学与生态学、生态学、环境科学、气象与大气科学、林学、农学及水资源等领域,体现出综合性和交叉性特点。(3)在全球气候变化背景下,目前陆地生态系统碳水耦合关系的研究主要以通量观测站为依托,结合模型模拟、稳定同位素技术、涡度相关技术等研究手段,将单个通量站点联合扩展到多点联网格局,并结合GIS、遥感和模型等方法在面上进行观测与模拟,从而构建更大尺度的碳水资源评价模型。拓展和推移研究的空间尺度,预测时间尺度上的变异规律是近年来新兴的研究热点。

Current Status and Future Trends for Carbon and Water Coupling of Terrestrial Ecosystem Based on CiteSpace

In the context of global climate change, more and more scientists and research institutions in worldwide focused on the topic of carbon-water coupling of terrestrial ecosystem. Based on the papers in database of Web of Science Core Collection, a literature analysis on carbon-water coupling of terrestrial ecosystem was conducted using CiteSpace, a software for visualizing and analyzing trends and patterns in scientific literature. The purpose of this work is to explore the hot issues of carbon-water coupling of terrestrial ecosystem and its developing trends in future on the basis of the worldwide evolution of topics and the current status of this research. The results indicated that (1) the number of research papers on carbon-water coupling of terrestrial ecosystem showed a rapid increase from 1999 to 2018, and the number in the late 10 years increased faster than that in the previous 10 years. Three scholars, including Black TA, Yu GR and Chen JQ, were the core author group with a large number of articles. The Chinese Academy of Sciences, University of Chinese Academy of Sciences, US Forest Service, University of California at Berkeley, Oregon State University, etc. were the major research institutions publishing papers in the field of carbon-water coupling of terrestrial ecosystem. (2) The research field, including environmental sciences & ecology, ecology, environmental sciences, meteorology & atmospheric sciences, forestry, agriculture, water resources and remote sensing were convered in the field of carbon-water coupling of terrestrial ecosystem in terms of co-citation journals, and this phenomenon reflected that the research of carbon-water coupling of terrestrial ecosystem were comprehensive and cross-disciplinary science. (3) In the context of global climate change, the current research on the coupling relationship between carbon and water of terrestrial ecosystem was mainly based on the flux observation station. Combined with model simulation, stable isotope technology, eddy covariance technology and other research methods, the research scale changed from the single flux site to joint multi-point networking. The lastly research focused on building a larger scale of carbon-water resource evaluation model based on the methods of GIS, remote sensing, model simulation, and so on. To expand and develop the spatial scale of this research and explore the variation law on the time scale was predicted to be the emerging research hot in recent years.