联合小波变换和多重分形的祁连山东北部断层活动热异常研究
结题报告
批准号:
42004044
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
刘珠妹
学科分类:
地震学
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
刘珠妹
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中文摘要
断层运动引起的热异常释放是地球动力学和地震学的重要课题。2019年底,我国高分对地观测建设任务的全部完成,使得更精细的断层活动遥感热异常研究成为现实。而祁连山东北部构造区是近年来六级地震危险区,其气象和人类活动影响较少,备受地震学领域广泛关注。本课题拟针对此区域,采用国产卫星辐射产品以及全球NCEP/NCAR气象同化资料,联合多重分形滤波和小波分析技术,压制变化性的背景辐射干扰、突出局部异常,识别与提取与断层活动有关的热异常信号。在此基础上,建立长时间序列的跨断层地表温度统计回归模型,利用多参数联合反演红外辐射异常与具体构造的相关性和差异性,并定量分析十年尺度的区域构造活动与地表热异常的时空规律。研究成果将有助于加深热红外辐射异常与构造活动关系的认识,为揭示地震热异常现象的物理模型和机理提供数据支撑。
英文摘要
Anomalies of thermal release from fault motion is a key topic of geodynamics and seismology. The accomplishment of China's high-resolution earth observation construction in 2019 is surely to promote a more precise research work on remote sensing thermal anomalies related to fault activities. The northern Qilian tectonic zone is a danger zone of possible Ms 6 earthquake in recent years. With minor interference of meteorological or human activity signals, it has attracted extensive attention in the field of seismology. In this study, we will discover the utility of multi-fractal and wavelet analysis on tectonic related radiation anomaly at the northeast section of Qilian tectonic zone using domestic satellite OLR products and the NCEP/NCAR meteorological assimilation data. Considering that the multi-fractal model is capable of suppressing background interference and highlighting local anomalies, it can be applied to the fractal filtering of wavelet subset and detect extreme abnormal events ignored by traditional wavelet analysis. Furthermore, a long time series statistical regression model of surface temperature across faults will be established, quantitative analysis on regional tectonic activities and surface thermal anomalies will be implemented. This research is helpful to further understanding the correlation between thermal infrared radiation anomalies and specific tectonic activities, and will provide more information for revealing the physical mechanism of seismic thermal anomalies.
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DOI:10.1007/s12145-023-00960-6
发表时间:2023
期刊:Earth Science Informatics
影响因子:2.8
作者:Zhumei Liu;Haikun Jiang;Shengle Li;Mingxiao Li;Jian Liu;Jingfa Zhang
通讯作者:Jingfa Zhang
DOI:--
发表时间:2021
期刊:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
影响因子:5.5
作者:Zhumei Liu;Jingfa Zhang;Xue LI;Xiaolin Chen
通讯作者:Xiaolin Chen
DOI:--
发表时间:2021
期刊:地震工程学报
影响因子:--
作者:刘珠妹;张景发;李盛乐
通讯作者:李盛乐
DOI:--
发表时间:2022
期刊:地震科学进展
影响因子:--
作者:贾雪璨;龚川;刘珠妹;李盛乐
通讯作者:李盛乐
国内基金
海外基金