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基于地震监测应用的地表温度和长波辐射数据对比分析

DOI: 10.6046/gtzyyg.2015.01.13, PP. 81-86

Keywords: 地表温度(LST),长波辐射(OLR),地震监测

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Abstract:

从数据本身特征及其应用2个方面对地震监测中常用的地表温度(landsurfacetemperature,LST)和长波辐射(outgoinglongwaveradiation,OLR)数据进行了对比分析。利用全球数据进行的对比分析结果表明,2种数据在高纬度和中纬度地区具有空间分布上的一致性,但在赤道及低纬度地区则表现出明显差异,认为这一差异与云量分布关系密切;根据我国大陆的云量分布特点选择特征点进行LST和OLR的对比分析表明,云量大于65%的区域,二者的同步性较差,云量低于65%的区域,则同步性较好。据此,以同步性较好的青海地区和同步性较差的中南部区域为试验区,对比了2种数据的涡度计算结果。研究表明,在地震监测应用中,利用2种数据获得的地震异常信息在时、空、强特征上表现为相同或不同都是可能的,LST主要是对增温现象的反映,而OLR则侧重于对整个地-气系统异常的综合反映。

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