青藏高原东部及周边地区热红外背景场特征  

The Characteristics of Satellite Thermal Infrared Background Field in the Eastern Qinghai-Tibet Plateau and Surrounding Areas

作　　者：张铁宝[1] 杨星 路茜[1] 龙锋[1] ZHANG Tie-bao;YANG Xing;LU Qian;LONG Feng(Sichuan Earthquake Agency, Chengdu 610041, China)

机构地区：[1]四川省地震局,成都610041

出　　处：《科学技术与工程》2021年第22期9217-9223,共7页Science Technology and Engineering

基　　金：国家自然科学基金(42074082);国家重点研发计划(2019YFC1509205);中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项(ZDJ2018-18)。

摘　　要：背景场是卫星红外地震异常研究的基础。利用均值法构建红外背景场,并从季节、纬度和地形等方面分析了强震高发的青藏高原东部及其周边地区的卫星红外辐射背景场特征。结果显示,青藏高原东部及其周边地区红外背景场具有明显的季节年变化特征,但不同地区的年变化趋势不完全一样;红外背景场具有纬度特征,高纬度地区年变幅度大,低纬度地区年变幅度小;红外背景场还具有地形特征,地形起伏大的地方红外辐射波动幅度大,地形起伏小的地方红外辐射波动幅度小,红外辐射与海拔成负相关关系。这些分析结果有助于深入理解卫星红外背景场,对卫星红外地震监测应用具有一定的科学参考价值。Background field is the basis of research on satellite infrared seismic anomaly.The infrared background field was constructed using the mean method.The characteristics of the satellite infrared radiation background field were analyzed in the eastern part of the Qinghai-Tibet Plateau and its surrounding areas from the season,latitude and terrain.The results show that,thermal infrared background field is affected by seasonal variation in time and by terrain and latitude in space;and the numerical range of annual variation of infrared radiation in the area of high latitude is larger than low latitude;and the infrared radiation is negatively correlated with altitude,the value of the infrared radiation in the area of high altitude is smaller than low altitude at the same time.The results are helpful for in-depth understanding of the satellite infrared background field and valuable for seismic monitoring and application of satellite thermal infrared.

关 键 词：卫星遥感 热红外 青藏高原东部 背景场 地震 

分 类 号：P315.72[天文地球—地震学]