气候变化领域集成服务门户(CCPortal): Temporal Variation and Frequency Dependence of Seismic Ambient Noise on Mars From Polarization Analysis

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DOI	10.1029/2020GL087123
	Temporal Variation and Frequency Dependence of Seismic Ambient Noise on Mars From Polarization Analysis
	Suemoto Y.; Ikeda T.; Tsuji T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	We applied a polarization analysis of InSight seismic data to estimate the temporal variation and frequency dependence of the Martian ambient noise field. Low-frequency (<1 Hz) P waves show a diurnal variation in their dominant back azimuths that are apparently related to wind and the direction of sunlight in a distant area. Low-frequency Rayleigh waves (0.25–1 Hz) show diurnal variations and a dominant back azimuth related to the wind direction in a nearby area. Low-frequency signals that are derived mainly from wind may be sensitive to subsurface structure deeper than the lithological boundary derived from an autocorrelation analysis. On the other hand, dominant back azimuths of high-frequency (>1 Hz) waves point toward the InSight lander, especially in daytime, indicating that wind-induced lander noise is dominant at high frequencies. These results point to the presence of several ambient noise sources as well as geologic structure at the landing site. © 2020. The Authors.
英文关键词	Lithology; Polarization; Seismic waves; Seismology; Autocorrelation analysis; Frequency dependence; Geologic structures; High frequency HF; Low-frequency signals; Polarization analysis; Subsurface structures; Temporal variation; Acoustic noise; ambient noise; autocorrelation; azimuth; frequency analysis; frequency dependence; geological structure; lithology; Mars; Martian atmosphere; P-wave; polarization; Rayleigh wave; seismic data; seismic noise; temporal variation
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170159
作者单位	Department of Earth Resources Engineering, Kyushu University, Fukuoka, Japan; International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka, Japan; Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan
推荐引用方式 GB/T 7714	Suemoto Y.,Ikeda T.,Tsuji T.. Temporal Variation and Frequency Dependence of Seismic Ambient Noise on Mars From Polarization Analysis[J],2020,47(13).
APA	Suemoto Y.,Ikeda T.,&Tsuji T..(2020).Temporal Variation and Frequency Dependence of Seismic Ambient Noise on Mars From Polarization Analysis.Geophysical Research Letters,47(13).
MLA	Suemoto Y.,et al."Temporal Variation and Frequency Dependence of Seismic Ambient Noise on Mars From Polarization Analysis".Geophysical Research Letters 47.13(2020).