气候变化领域集成服务门户(CCPortal): Incorporating Wind Information in the Inversion of Co-Located Pressure and Seismic Data for Shallow Elastic Structure

CCPortal

DOI	10.1029/2020JB021162
	Incorporating Wind Information in the Inversion of Co-Located Pressure and Seismic Data for Shallow Elastic Structure
	Tanimoto T.; Wang J.
发表日期	2021
ISSN	21699313
卷号	126 期号:5
英文摘要	When surface pressure is large, seismic noise between about 0.01 and 0.05 Hz is mostly generated by wind-related surface pressure changes. By analyzing this phenomenon using co-located pressure and seismic data, we can derive shallow elastic structure in the uppermost 50–100 m. However, there still remains a difficult question on seismic excitation by wind-related surface pressure because of complexity in wind behaviors. Roughly speaking, it consists of the mean shear flow and turbulence. The mean flow should act like a moving pressure source on the surface while turbulent parts act like a stochastic source as the surface pressure field becomes heterogeneous. We point out that this complexity may be reduced by selecting time intervals of stable wind direction. During such time intervals, pressure changes occur in the direction of winds, which justifies us to use a relatively simple, moving pressure source model. We quantify the stability of wind direction by the standard deviation of wind direction data (ΔΨ). For stations with co-located wind, pressure, and seismic data, we propose to select time intervals with small ΔΨ first and apply our inversion method based on the moving pressure model. In the absence of wind data at a station with co-located pressure and seismic data, we propose to analyze the high-pressure end of data, as this selection partially satisfies the stable wind condition. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	co-located pressure and seismic data; critical zone; inversion; shallow elastic structure; Vs30; wind and pressure
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187148
作者单位	Department of Earth Science and Earth Research Institute, University of California Santa Barbara, Santa Barbara, CA, United States
推荐引用方式 GB/T 7714	Tanimoto T.,Wang J.. Incorporating Wind Information in the Inversion of Co-Located Pressure and Seismic Data for Shallow Elastic Structure[J],2021,126(5).
APA	Tanimoto T.,&Wang J..(2021).Incorporating Wind Information in the Inversion of Co-Located Pressure and Seismic Data for Shallow Elastic Structure.Journal of Geophysical Research: Solid Earth,126(5).
MLA	Tanimoto T.,et al."Incorporating Wind Information in the Inversion of Co-Located Pressure and Seismic Data for Shallow Elastic Structure".Journal of Geophysical Research: Solid Earth 126.5(2021).