火山区突发性地热异常热红外传输机理研究

Research on Transmission Mechanism of Thermal Infrared Remote Sensing for Abrupt Geothermal Anomaly in Volcanic Region

实验研究证实 ,在火山喷发前兆期 ,火山区有明显的突发性地热异常现象。火山区的突发性地热异常特征与火山区的地质构造、火山成因、规模、类型等多种因素有关。火山区突发性地表热异常是热红外遥感监测、预测火山活动的重要标志。从传导、对流等多方面分析了异常区地表升温机制 ,并在地物体有效辐射的基础上给出了热红外辐射的大气传输方程。热红外辐射在传输过程中受到地表非漫射性等系统噪声和随机噪声的干扰 ,为热红外遥感监测、预测火山活动提供了理论依据。

A lot of experiments have proved that there is an obvious abrupt geothermal anomaly in volcanic region before volcanic eruption. The characters of the abrupt geothermal anomaly concern many factors such as geological structure, cause of volcanic formation, volcanic scope and type. On the other hand, this kind of geothermal anomaly is an important sign for using thermal infrared remote sensing to monitor and forecast the volcanic activities. This paper analyses rising temperature's mechanism on the earth's surface in the anomalous region from radiation, convection and so on, and raises an atmospheric transmission equation of thermal infrared radiation on the basis of surface feature effective radiation when thermal infrared radiation transmits and the cover of earth's surface feature, air, cloud, rain, wind and cold airflow affect it. All of noise analysis in the article are the theory foundation for using thermal infrared technology to monitor and forecast volcanic activities.