东北寒区流域水-碳循环耦合模拟研究

项目名称： 东北寒区流域水-碳循环耦合模拟研究

项目编号： No.51309245

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 陈向东

作者单位： 中国水利水电科学研究院

项目金额： 25万元

中文摘要： 陆地生态系统碳循环和水循环是陆地表层系统物质能量循环的核心，在陆地表面有着紧密联系，时刻发生着相互作用与反馈，并与气候密切相关。水碳耦合机制是目前全球变化科学研究的热点与核心问题，考虑碳循环等生态过程的影响也是新一代流域水文模型的发展趋势，具有重要研究价值。而寒区因气温低，存在冻土，是重要碳汇，其水、碳循环机制有独特的特点，并对气候变化敏感脆弱。因此寒区水、碳循环规律更值得关注。本项目通过资料收集、数据监测与野外试验，研究寒区水碳通量演变规律。然后基于水碳相互作用机制，将分布式水文模型与生物地球化学模型进行"双向"耦合，针对寒区特点研制能够对冻土水热过程、水循环、碳循环、能量收支、植被生长、人类活动及其相互作用进行综合模拟的寒区流域水-碳循环耦合模型。基于所构建的模型研究东北寒区流域水、碳通量的时空分布规律及对气候变化的响应。项目研究能够为寒区流域水碳循环研究提供有益参考与模型工具。

中文关键词： 水文模型；生物地球化学模型；水碳耦合；；

英文摘要： Carbon and the water cycle of terrestrial ecosystem are the core of material and energy cycle at the land surface. They are closely linked to the land surface, have interactions and feedback all the time, and are closely related to climate. Water-carbon coupling mechanism is the core and hot topic of global change research. Considering the impact of the carbon cycle is also the development trend of the hydrological model, it has important research value. Cold region where frozen soil is distributed is important carbon sink due to the low temperatures, its mechanisms of water and carbon cycle have unique characteristics, and cold regions are sensitive and vulnerable to climate change. So the research on water-carbon coupling mechanism in cold regions deserves more attention. Evolution rule of water and carbon flux in cold region is studied by monitoring data and the field experiment. Then, based on the water-carbon interaction mechanisms, distributed hydrological model and biogeochemical model are "two-way" coupled. For the characteristics of cold regions, the watershed scale water-carbon coupling model of cold region is established and it could simulate the frozen soil process, water and carbon cycle, energy budget, vegetation growth, human activities and their interactions. Based on the model, the watershed spa

英文关键词： hydrological model；biogeochemical model；water-carbon coulpling；；