摘要
以植被的能量平衡方程为基础,根据植被内的湍流交换模式及辐射能的传输过程,考虑了风速、气温和水汽压廓线等影响,建立了一个适合于林冠的3层植被热红外辐射模型.用了新的计算方法,大大地提高了模型收敛速度.实验数据检验结果表明:所建的模型能正确地模拟植被各层温度随不同气象条件、不同植被结构等参数的变化.
A three-layer thermal vegetation canopy model applicable to forest canopies
was developed and tested by field experiments. The model is based on the energy budget
equations that describe the interactions between short and long wave radiation, sensible
heat flux and latent heat flux within three horizontally infinite canopy layers. Particularly it
concerns the wind, air temperature and water vapor pressure profiles in the canopy, which
were never considered in the earlier models. In solving the nonlinear energy budget equa-
tions, a new method was adopted, resulting in the reduction of the model computer time
greatly. The calculated results of the model are in good coincidence with the observed data,
which shows that the new model is able to simulate exactly the variation of canopy temper-
ature with vegetation structure and environmental conditions.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第5期345-351,共7页
Journal of Infrared and Millimeter Waves
基金
国家自然科学基金资助项目
关键词
植被
红外辐射
温度
建立模型
vegetation canopy, infrared radiation, thermal model, remote sensing model.
