摘要
从理论上分析了土壤日温差、热惯量和含水量三者的关系，探讨了由地表土壤日温差推求土壤热惯量，再由土壤热惯量推求土壤含水量的土壤含水量观测新技术，提出一种由ＮＯＡＡ气象卫星ＡＶＨＲＲ资料获取大面积近地表层土壤含水量分布方法。
By theoretically analyzing the relations among surface soil diurnal temperature difference,soil thermalinertia and soil water content,a methodology for estimating soil water content with NOAA/AVHRR data ispresented in this study,In this two-stage methodology,soil thermal inertia is first calculated with surfacesoil diurnal temperature computed with satellite data,and soil water content is estimated with the soil ther-mal inertia. The utility of the methodology is demonstrated by applying it to soil content estimating in Liaon-ing Province,Northeast of China.
出处
《科技通报》
1994年第1期43-46,共4页
Bulletin of Science and Technology
关键词
气象卫星
土壤含水量
热惯量
温差
meteorological satellite
soil moisture
thermal inertia
temperature difference
