新疆OLR基本特征及强震前的异常现象

OLR Characteristics in Xinjiang and the Abnormal Phenomena before Strong Earthquakes

利用美国国家环境监测中心的NOAA卫星长波辐射(OLR)月际资料进行数据的月距平、涡度场计算等处理,总结分析了新疆地区长波辐射场的基本特征。对2003年以来新疆及其周边地区发生的中强震进行研究,发现在部分地震前震中及附近地区出现较明显的高值辐射异常,认为这种现象可能与强震前的地-气系统变化有关。应用OLR资料进行新疆地区的地震趋势预测研究可在一定程度上弥补前兆台网监测能力的不足。

Using the Outgoing Longwave Radiation （ OLR ） data of NOAA satellite from the National Center of Environmental Prediction （NCEP） of U. S. A. , the monthly distance average and eddy field calculation are done, and the main characteristics of OLR field in Xinjiang are summarized. By analyzing the abnor- mal phenomena before moderate and strong earthquakes since 2003, it is found that high anomalous values appered very close to the epicenter regions before some of earthquakes. It is considered that this feature is related to the change of earth - atmosphere system before strong earthquakes. Applying OLR data to earthquake prediction can remedy shortage of the precursor station in Xinjiang.