森林生态系统碳通量遥感估算中若干问题的探讨

森林生态系统碳通量是判定森林是CO₂源/汇的标准, 其准确估算对碳循环研究具有重要的意义。针对森林生态系统碳通量的遥感研究处于起步阶段, 还有很多问题值得我们去探索。文中较系统地总结了有关碳通量的3种主要研究方法——样地清查法、通量观测法和模型模拟法; 重点分析了碳通量遥感估算中存在的问题, 主要有模型的全遥感化、尺度扩展和模型的不确定性等, 并对如何解决这些问题提出了粗浅的看法, 展望了一个全遥感化的森林生态系统碳通量模型, 希望对相关研究的开展有一些促进作用。

Discussion on Several Questions About Carbon Flux Estimation of Forest Ecosystem Based on Remote Sensing

Carbon flux of forest ecosystem is the criterion to judge whether forest is carbon source or sink,and its exact estimation is significant for carbon cycle study.However,the study on carbon flux estimation of forest ecosystem based on remote sensing is appearing a new wave,it has a lot of questions to research.This paper systematically summarizes the research methods of carbon flux,and there are three major approaches,sample plots inventories,carbon flux measurements and modeling.Furthermore,main analysis were put on the problems of carbon flux estimation based on remote sensing,which includes modeling using RS,scale transformation and uncertainly of model.Some opinions are produced to solve this problems,and a carbon flux model based on RS is predicted. It is hoped that this can be helpful for related researches.