气候变化领域集成服务门户(CCPortal): Autocorrelation Infrasound Interferometry

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DOI	10.1029/2020JB020513
	Autocorrelation Infrasound Interferometry
	Ortiz H.D.; Matoza R.S.; Johnson J.B.; Hernandez S.; Anzieta J.C.; Ruiz M.C.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	Seismic and infrasound multistation ambient-noise interferometry has been widely used to infer ground and atmospheric properties, and single-station and autocorrelation seismic interferometry has also shown potential for characterizing Earth structure at multiple scales. We extend autocorrelation seismic interferometry to ambient atmospheric infrasound recordings that contain persistent local noise from waterfalls and rivers. Across a range of geographic settings, we retrieve relative sound-speed changes that exhibit clear diurnal oscillations consistent with temperature and wind variations. We estimate ambient air temperatures from variations in relative sound speeds. The frequency band from 1 to 2 Hz appears most suitable to retrieve weather parameters as nearby waterfalls and rivers may act as continuous and vigorous sources of infrasound that help achieve convergence of coherent phases in the autocorrelation codas. This frequency band is also appropriate for local sound-speed variations because it has infrasound with wavelengths of ∼170–340 m, corresponding to a typical atmospheric boundary layer height. After applying array analysis to autocorrelation functions derived from a three-element infrasound array, we find that autocorrelation codas are composed of waves reflected off nearby topographic features, such as caldera walls. Lastly, we demonstrate that autocorrelation infrasound interferometry offers the potential to study the atmosphere over at least several months and with a fine time resolution. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	autocorrelations; infrasonic thermometer; infrasound; interferometry; noise; volcano infrasound
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/187230
作者单位	Department of Earth Science and Earth Research Institute, University of California, Santa Barbara, CA, United States; Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador; Department of Geosciences, Boise State UniversityID, United States; Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador
推荐引用方式 GB/T 7714	Ortiz H.D.,Matoza R.S.,Johnson J.B.,et al. Autocorrelation Infrasound Interferometry[J],2021,126(4).
APA	Ortiz H.D.,Matoza R.S.,Johnson J.B.,Hernandez S.,Anzieta J.C.,&Ruiz M.C..(2021).Autocorrelation Infrasound Interferometry.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Ortiz H.D.,et al."Autocorrelation Infrasound Interferometry".Journal of Geophysical Research: Solid Earth 126.4(2021).