气候变化领域集成服务门户(CCPortal): Accurate Estimations of Sea-Ice Thickness and Elastic Properties From Seismic Noise Recorded With a Minimal Number of Geophones: From Thin Landfast Ice to Thick Pack Ice

CCPortal

DOI	10.1029/2020JC016492
	Accurate Estimations of Sea-Ice Thickness and Elastic Properties From Seismic Noise Recorded With a Minimal Number of Geophones: From Thin Landfast Ice to Thick Pack Ice
	Moreau L.; Weiss J.; Marsan D.
发表日期	2020
ISSN	21699275
卷号	125 期号:11
英文摘要	Despite their high potential for accurate sea ice properties estimation, seismic methods are still limited by the difficulty of access and the challenging logistics of polar environments. Conventional seismic methods generally require tens of geophones together with active seismic sources for monitoring applications. While this is not an issue for mainland environment, it is restrictive for sea ice and prevents long-term monitoring. We introduce a method to estimate sea ice thickness and elastic properties from passive recordings of the ambient seismic field with a minimal number of geophones. In comparison with our previous work (Moreau et al., 2020; https://doi.org/10.1029/2019JC015709) where about 50 sensors were used, the number of geophones is reduced by 1 order of magnitude, thanks to a new strategy of inversion of the passive seismic data. The method combines noise interferometry for estimating the elastic properties, with a Bayesian inversion of the dispersion in the waveforms of icequakes for inferring ice thickness, based on passive recordings from only 3–5 geophones, depending on the signal to noise ratio. We demonstrate its potential both on data recorded on thin landfast ice in Svalbard, and on data recorded on thick pack ice in the Arctic ocean. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	monitoring; sea ice; seismic noise
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186583
作者单位	Institut des Sciences de la Terre, Université Grenoble Alpes, Grenoble, France; Institut des Sciences de la Terre, Université de Savoie Mont Blanc, Le Bourget du Lac, France
推荐引用方式 GB/T 7714	Moreau L.,Weiss J.,Marsan D.. Accurate Estimations of Sea-Ice Thickness and Elastic Properties From Seismic Noise Recorded With a Minimal Number of Geophones: From Thin Landfast Ice to Thick Pack Ice[J],2020,125(11).
APA	Moreau L.,Weiss J.,&Marsan D..(2020).Accurate Estimations of Sea-Ice Thickness and Elastic Properties From Seismic Noise Recorded With a Minimal Number of Geophones: From Thin Landfast Ice to Thick Pack Ice.Journal of Geophysical Research: Oceans,125(11).
MLA	Moreau L.,et al."Accurate Estimations of Sea-Ice Thickness and Elastic Properties From Seismic Noise Recorded With a Minimal Number of Geophones: From Thin Landfast Ice to Thick Pack Ice".Journal of Geophysical Research: Oceans 125.11(2020).