Forest ecosystem simulation modelling: the role of remote sensing

In recent years forest ecosystems have come under increasing pressure from environmental changes such as global warming and the impacts of pollution. Recent research has indicated that computer-simulation models driven by rem otely sensed estimates of key variables may be used to assess the spatial i mpact of global environment changes on forest processes. This article begin s with a discussion of key issues related to driving such models with remot ely sensed estimates of these key variables. The article then outlines an i nvestigation that examined whether a general ecosystem simulation model (FO REST-BGC), driven by remotely sensed and meteorological data, could be used to estimate forest processes for a Sitka spruce (Picea sitchensis) plantat ion in mid-Wales.