全球变化陆地样带研究及其进展

对IGBP中的研究热点——全球变化陆地样带研究——作了较为详细的综述。分析了IGBP样带兴起的原因,在全球的分布以及各条样带的主要研究任务,特别对于美国俄勒冈样带(OTIER)和中国东北温带样带(NECT)作了详细的论述。美国OTTER项目的完成,表明即使是ROREST-BGC这样需要众多环境变量的机理性模型,其所需的大部分变量可以用遥感手段获得,从而为机理性模型斑块推向区域、保证其模拟精度,并使其具有良好的操作性提供了途径,对于以后的样带研究有良好的启发性。中国NECT已经进入实质性研究阶段,对于生态脆弱地区的判定,空间仿真模型的建立以及从NDVI推导参数都取得了较大进展。

ADVANCE RESEARCH ON TERRESTRIAL TRANSECTS

Transect research is being a focus of IGBP in recent years.The paper answered the reasons for research on transects and their distribution and respective research objects on the globe,especially detaily discussed the two transects among them,American' s OTTER and China' s NECT.The finish of the OTTER has indicated that the mechanistic models,such as Forest-BGC,even they need numerious environmental variations to run them,most variations can be deduced via the way of remote sensing.This enables us to develop mechanistic models at regional level,Thus improves their manipulation and in the meantime ensures their simulation accuracy.The ongoing Chinese northeast transect has also had many progresses in the decision on Ecotone area,setting up spatial simulation model and deducing parameters of the model from NDVI and so on.