项目名称: 蒙古高原植被净初级生产力变化规律及其驱动机制研究
项目编号: No.41301456
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 天文学、地球科学
项目作者: 包刚
作者单位: 内蒙古师范大学
项目金额: 24万元
中文摘要: 已有研究表明,尽管近30年来全球植被活动呈明显增强趋势,但受气候变化和土地利用方式的区域差异,在区域尺度上的植被生产力增减趋势及其强度和驱动机制尚不清楚,存在着较大的不确定性和争议。蒙古国作为中国北方重要邻国,与我国内蒙古毗邻在一起形成蒙古高原的主体,具备了重要和独特的区域特色,其生态系统和环境问题及其导致的区域气候变化将对整个华北区域、甚至东北亚地区的气候和生态安全产生重要影响。本申报项目将在对光能利用率CASA模型进行参数优化和本地化处理的基础上,通过模型模拟、观测数据和已有研究成果的集成分析,模拟蒙古高原近30年植被净初级生产力时空动态,并从气候变化和人类活动的角度探究导致其生产力变化的主要原因,重点揭示生产力对全球气候变化的响应方式、强度和机制。研究成果将为验证欧亚大陆植被活动及其气候响应强度、减小周边国家对我国资源环境可能产生的风险系数和我国参加气候变化谈判等方面具有重要意义。
中文关键词: 蒙古高原;植被净初级生产力;最大光能利用率;CASA模型;时空变化
英文摘要: The studies have indicated that despite the global vegetation activiy tend to increase,the change trend and intensity of regional vegetation productivity and their driving mechanism was not clear yet,and still exited many uncertainties and controversy since the fact that the regional discrepancies of climate change and land use fearture. As one of the important Neighboring country, Mongolia bordered with Inner Mongolia Autonomous Region, China to accounted for major part of Mongolian Plateau (MP), with unique and important regional characteristics.The ecosystems and environmental problems of MP and their induced regional climate have an significant impacts on climate and ecological risk of north China and even northeast Asia.The present appling project will simulate the vegetation net primary productivity (NPP) in MP using paramaters optimized and regional adjusted CASA model for previous 30 years through integrating the techniques of ecosystem models, observed sample datasets and previous study results. The project will also explore the reasons of NPP changes from the aspects of climate change and human activities, and will particularly demonstrate the NPP variability and their response intensity,characteristic and mechanism to global climate change. The study results will be important to verify vegetation acti
英文关键词: The Mongolian Plateau;Net Primary Productivity;Maximal Light Use Efficiency;CASA Model;Spatial and temporal changes