FOREST ECOSYSTEM MODELLING, UPSCALING AND REMOTE SENSING
|
1999年
关键词:
remote sensing;
modelling;
pollution;
heavy metals;
vegetation stress;
D O I:
暂无
中图分类号:
Q14 [生态学(生物生态学)];
学科分类号:
071012 ;
0713 ;
摘要:
A brief overview of a recently funded project that will, over the next three years, attempt to improve our ability to use remote sensing to detect pollution stress in vegetation is presented. Attempts in the past to relate remotely sensed information to pollution induced vegetation stress have been confounded by natural environmental stresses which interact with or mimic pollution stress. The aim of this project is to develop a process-based physiological model that will integrate the plant's response to background environmental conditions and pollution-induced stresses, and then to couple this model to a radiative transfer model. This combined model will be used to rigorously examine the reflectance response of the plant canopy to different pollution scenarios. The interpretation of 'stress' is then through comparison of the observed biophysical variables (leaf area index (LAI), chlorophyll) against the expected performance predicted by the physiological model not affected by the contaminant.