项目名称: 基于遥感-TEM优化模型的中纬度湿地生态系统碳循环方法研究
项目编号: No.41201193
项目类型: 青年科学基金项目
立项/批准年度: 2013
项目学科: 地理学
项目作者: 孔春芳
作者单位: 中国地质大学(武汉)
项目金额: 26万元
中文摘要: 湿地生态系统在全球碳循环中起重要作用,并对全球气候变化影响巨大,然而,由于其结构与功能复杂、时间与空间异质性强,且易受人类活动影响,因此,科学估算湿地时空格局变化及其对区域湿地生态系统碳库的影响是当前全球变化与全球碳循环研究的重点内容。本项目以江汉平原自然湿地生态系统为研究对象,利用RS、GIS、分形几何学及景观生态学方法研究江汉平原湿地1985、1995及2005年的时空格局变化,并根据江汉平原的生态环境特征、地面通量、及遥感模型估算NPP等数据,建立基于野外观测数据-遥感模型-陆地生态模型TEM-GIS空间分析相结合的区域碳循环方法体系,模拟与估算江汉平原不同类型湿地生态系统的碳收支,定量分析20年来江汉平原湿地生态系统碳循环的特征及其源/汇强度时空格局,揭示中纬度区域湿地时空结构变化及其对区域碳循环影响的规律,为我国中纬度区域开展湿地生态系统碳循环影响全球气候变化定量化研究奠定基础。
中文关键词: 湿地生态系统;时空演化;净初级生产力;甲烷;碳循环
英文摘要: It plays an important role for wetland ecosystem in the global carbon cycle, and has a huge impact on global climate change. It is the focus of global change and the global carbon cycle for scientific estimating wetland spatial and temporal pattern change and its impact on wetland ecosystem carbon pools, due to the complexity of its structure and function, heterogeneity of time and space, and vulnerability to human activities. With the support of RS, GIS, fractal geometry and landscape ecology method, the objects of this project are, therefore, (1) to research the spatial and temporal pattern of change for natural wetlands of Jianghan Plain in 1985, 1995 and 2005; (2) to establish the methodology based on field observation data- - RS-TEM- - GIS for natural wetland ecosystem carbon cycle of Jianghan Plain, by ecological environment characteristics, the surface flux, and NPP data from remote sensing model of Jianghan Plain; (3) to simulate and estimate different types wetland ecosystem carbon budget of the Jianghan Plain; (4) to quantitatively analyze of the spatial and temporal pattern of wetland carbon cycle characteristics and their source/sink strength for 20 years of the Jianghan Plain, and (5) to reveal the law of the natural wetland spatial and temporal structural changes and their affecting on regional w
英文关键词: wetland ecosystem;temporal and spatial evolution;net primary productivity;methane;carbon cycle