【作者】 荆凤； 申旭辉； 康春丽； 孟庆岩； 熊攀；

【Author】 JING Feng~(1,2,3),SHEN Xu-hui~3,KANG Chun-li~4,MENG Qing-yan~(1X),IONG Pan~3 (1.Institute of Remote Sensing Applications,CAS,Beijing 100101,China;2.Graduate School, CAS,Beijing 100049,China;3.Institute of Earthquake Science,CEA,Beijing 100036,China; 4.China Earthquake Networks Center,CEA,Beijing 100045,China)

【机构】 中国科学院遥感应用研究所； 中国科学院研究生院； 中国地震局地震预测研究所； 中国地震台网中心；

【摘要】 利用美国国家海洋大气局(NOAA)提供的30年(1979—2008)的长波辐射数据产品(OLR),对中国大陆地区长波辐射背景场进行分析。结果表明,长波辐射值具有很强的季节性和地域性,青藏高原块体在四季中都呈现低值,中国西北部和华东地区的长波辐射值相对青藏高原块体高,这些区域在春秋两季长波辐射变化剧烈,夏冬两季变化相对缓慢。熟悉这些特征将有利于识别地震异常与非震异常,可以为为进一步开展长波辐射的地震异常信息提取提供科学依据。通过建立的中国川滇地区长波辐射背景场,分析了2008年5月12日汶川8.0级地震前的长波辐射数据,发现震前一个月长波辐射异常显著,并且异常的分布受活动构造控制。更多还原

【Abstract】 The analysis of mathematical statistics and spatial features are have been presented for China using outgoing longwave radiation(OLR) data for 30 years(1979—2008) from National Oceanic and Atmospheric Administration(NOAA),USA.The analysis result shows that there are strongly seasonal and regional variations in outgoing longwave radiation,such as,lower value in Qinghai-Tibet Plateau and higher in northwest and east China.The changes of OLR in these regions are dramatic in the spring and autumn and relatively slow in the summer and winter.Knowing these features will help identify seismic anomalies and non-seismic anomalies,can provide scientific foundation for seismic anomalies information using OLR data.As an example,OLR anomalies before the May, 12,2008 Wenchuan earthquake have been detected to have appered one before the earthquake in the Sichuan-Yunnan region and it seems that these anomalies are related to active faults.更多还原