摘要
从影响植被介电常数的几个关键因素出发,详细阐述了介电常数随植物含水量、电磁波频率以及温度等参数的动态变化情况;在此基础上,区别介绍了植物材料和植被冠层的相关介电常数模型以及它们各自的适用范围,并对各模型的模拟精度进行了对比和讨论.综合国内外目前对植被介电常数的研究现状,分析了当前该领域研究的不足之处,指出未来的研究可重点面向寒区微波遥感技术,以拓展频率和温度范围为核心,在明确植物体内自由水与束缚水真实含量的基础上,对原有植被介电常数模型进行改进和发展,提高模型对不同植被介电常数的模拟精度,使之能更好的应用于各种不同的自然环境,尤其是寒区冻土、积雪以及植被的微波遥感监测.
Key influence factors of dielectric constant dielectric constant changed dynamically as a function of of plant materials were discussed. It was found that water content, electromagnetic wave frequency and temperature. Simulation precision and current vegetation dielectric constant research, deficiencies in current research were discussed. Microwave remote sensing will important for future research in cold region, especially with expanded frequency and temperature, clarified content of free and bound waters in vegetation body. This will improve and develop original vegetation dielectric constant model. Simulation model precision for different vegetation should be improved, so that it could be applied in different natural environment, especially for microwave remote sensing of frozen soil.now and vegetation in cold regions.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第6期619-625,共7页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金资助项目(41171259,41030534)
中央高校基本科研业务费专项资金资助
关键词
植被介电常数
影响因素
模型
微波遥感
vegetation dielectric constant influencing factors model microwave remote sensing
