2010年玉树地震多参量热异常研究

本文对玉树地震前后的热异常多参量变化进行分析研究，主要包括长波辐射（Outgoing Longwave Radiation），地表温度（Land Surface Temperature），NCEP地面气温（National Center for Environmental Prediction）和地下水温。研究结果证实玉树地震前确实存在热异常现象。在多参量中，地下水温最早出现异常并且异常持续时间最长；其次出现热异常的是反映地表介质辐射属性的长波辐射；地表温度出现热异常的时间要晚于长波辐射；NCEP地面温度反映了一定垂直厚度的平均大气温度，因此最晚出现热异常现象。同时，玉树地震前的多参量热异常区域都位于震中南部或西南部。

Multi-parameters of Thermal Infrared Remote Sensing Anomalies of the Earthquake

Temporal and spatial anomalies associated with the Yushu earthquake, including the Outgoing Longwave Radiation (OLR), the Land Surface Temperature (LST) and surface temperature from the National Center for Environmental Prediction (NCEP) are studied using thermal infrared remote sensing data in this paper. All results confirmed the previous observations of thermal anomalies in the seismic region prior to this earthquake. Among the multi-parameter anomalies, the underground water temperature anomaly appeared first and lasted for the longest time; OLR anomaly, an infrared parameter which indicates the radiation characteristics of the land surface medium, was the first to be detected; LST anomalies appeared later than OLR. NCEP temperature indicates the average atmosphere temperature with a certain vertical thickness; therefore, it was the last detected anomaly. The anomalies of OLR and LST lasted for a similar time length and were all located in the south or southwest of the epicenter.