城市典型植被的热辐射特性研究

植被在改良土壤、防风固沙、净化环境、调节气候以及人类生存等方面具有不可替代的重要作用,因此植被研究是地球生态环境研究中不可或缺的内容。而日趋成熟的热红外监测技术则为植被研究提供了一种更快捷、更有效的手段。通过对吉林省长春市典型地面植被的亮度温度进行测量,得到了不同类型植被的热辐射特性。研究了不同角度、不同波段、不同时相和不同类型植被的热辐射特性。结果表明,植被类型对植被的亮度温度影响较大,波段对植被的亮度温度影响较小,测量时间对植被的亮度温度影响明显,探测角度对植被的亮度温度影响较大。该实验为植被类型的进一步精确识别和分类提供了重要依据。

Study of Thermal Radiation Characteristics of Typical Vegetation in City

Vegetation plays an irreplaceable important role in soil improvement, sand fixing, environment purifying, climate adjusting and human survival etc. Therefore, the study of vegetation is indispensable for the research on the ecological environment of the earth. The more and more mature thermal infrared detection technology can provide a more rapid and effective means for the vegetation research. By measuring the brightness temperature of the typical ground vegetation in Cangchun city, Jilin Province, the thermal radiation properties of different kinds of vegetation are obtained. The thermal radiation properties of different kinds of vegetation are studied in different wavebands and time phases at different angles. The result shows that the brightness temperature of vegetation is affected by the kind of vegetation largely, by the waveband less, by the measurement time obviously and by the detection angle greatly. It provides an important basis for more accurate recognition and classification of vegetation.