森林扰动遥感监测研究进展

Progress in the study of forest disturbance by remote sensing

作为陆地生态系统的主体,森林的碳循环与碳蓄积对研究陆地生态系统起着重要作用,但目前森林扰动资料的缺乏在很大程度上影响着区域森林碳通量的估算精度。在对森林扰动监测方法和监测指数进行总结的基础上,对几种森林扰动监测指数进行了比较研究。鉴于当前基于长时间序列的森林扰动研究主要集中在北美国家,国内鲜有系统报道,因此,针对我国森林变化特点,结合长时间序列扰动分析方法和适宜的扰动监测指数,研究适用于我国森林的扰动监测模型具有重要的理论意义和应用价值。

Forest ecosystems, which constitute a major part of the terrestrial biosphere, play an important role in terrestrial carbon cycling and storage. However, the accuracy of regional forest carbon-flux estimation is greatly influenced by the lack of forest disturbance data. After reviewing the monitoring methods and index, the authors compared several disturbance monitoring indices. The current study of forest disturbance based on long time series is mainly conducted by North America countries, and China’ s research work in this aspect is very rare. Therefore, on account of characteristics of China’ s forest change, it is of important theoretic significance and application value to develop a disturbance monitoring method applicable to China’ s forest by combining a long time series disturbance analysis method and a appropriate monitoring index.