卫星热红外遥感资料在地震预报中的应用研究

Study on Thermal Infrared Data of Satellite Remote Sensing Applied to Earthquake Prediction

摘要:

利用NOAA-AVHRR数据通过Becker & Li地温计算模型反演,得到有关地震发生前后每日的地表温度分布图像,然后进行逐日的地表温度分布图像以及震源区地表温度平均值日变时序曲线分析.结果表明震前出现了较明显的热红外地震前兆异常.最后指出,从NOAA-AVHRR数据中利用分裂窗技术反演陆地表面温度结果容易受到云层的干扰,但是更高空间分辨率和光谱分辨率的EOS/MODIS数据的产生以及由于EOS/AMSU能够透过云层探测到地表亮温,必将使卫星遥感热红外信息在地震监测预报中的应用范围及深度上得以拓展.

Abstract:

Through retrieving the data of NOAA--AVHRR, the daily land surface temperature distribution images before and after some earthquakes are obtained by using the land surface temperature calculation model of Becket ＆ Li. Then these images and the curve of daily land surface temperature average value for the epicenter area of the events are analyzed. The result shows that there are visible thermal infrared precursor anomalies before the earthquakes. Finally, it is pointed out that the retrieving land surface temperature from NOAA--AVHRR data by split window technique is fairly disturbed by cloud layers, but as the appearance of EOS/MODIS data with high space and spectrum resolution and their capability of observing land surface temperature through cloud layer, the thermal infrared information of satellite remote sensing will be more deeply and widely appplied in earthquake prediction.