论文部分内容阅读
青藏高原拥有我国面积最大的天然草地,区域内生态系统碳通量的长期定位观测研究具有重要意义.在总结生态系统碳通量主要研究方法基础上,对青藏高原不同植被类型碳循环的源、汇效应、时空变化及其与影响因子关系等研究领域所取得的重要进展进行了综合评述.现有研究表明,不同植被类型间CO2通量的季节变化、年际变化、交换量和碳源汇特征等存在明显差异,光合有效辐射、温度、降水、土壤水分和叶面积指数等是影响碳通量变化的主要驱动因子.最后,结合当前青藏高原地区生态系统碳通量研究的现实与需要,探讨了通量观测所面临的主要科学问题及解决途径.未来对青藏高原碳循环关键过程的研究工作还需要多尺度、长期生态实验和CO2通量观测数据支持,同时以此为基础发展新的数据处理、分析和跨尺度机理模拟方法,建立青藏高原生态系统碳循环模型.
Long-term positioning observation of ecosystem carbon flux in the region is of great importance to the Qinghai-Tibet Plateau, which has the largest natural grassland in our country. On the basis of summarizing the main research methods of carbon flux in the ecosystem, Exchange effect, spatio-temporal change and its relationship with the impact of factors such as the important progress made in the study made a comprehensive review of existing studies have shown that the seasonal variation of CO2 fluxes among different types of vegetation, the interannual variation, exchange capacity and carbon sink Characteristics, etc. There are significant differences in photosynthetic active radiation, temperature, precipitation, soil moisture and leaf area index are the main driving factors that affect the changes of carbon flux.Finally, combining with the reality and needs of carbon flux in ecosystem in Qinghai-Tibet Plateau, The main scientific problems and solutions to the flux observation are discussed.The future research work on key processes of the carbon cycle in the Tibetan Plateau will also require multi-scale and long-term ecological experiments and CO2 flux observation data to support the development of new Data processing, analysis and cross-scale mechanism simulation methods to establish a carbon cycle of the Tibetan Plateau ecosystem Type.