A climatology of infrasound detections in northern Norway at the experimental ARCI array

International audience The study of infrasound is experiencing a renaissance in recent years since it was chosen as a verification technique for the Comprehensive Nuclear-Test-Ban Treaty. Currently, 60 infrasound arrays are being installed to monitor the atmosphere for nuclear tests as part of the I...

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Bibliographic Details
Published in:Journal of Seismology
Main Authors: Evers, Läslo Gerardus, Schweitzer, Johannes
Other Authors: Seismology and Acoustics De Bilt, Royal Netherlands Meteorological Institute (KNMI), Acoustic Remote Sensing Group Delft, Faculty of Aerospace Engineering Delft, Delft University of Technology (TU Delft)-Delft University of Technology (TU Delft), NORSAR, Norwegian Seismic Array (NORSAR)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2011
Subjects:
Infrasound
Array
Signal detection
Source identification
Acoustic propagation
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Norway
Northern Norway
Online Access:https://hal.archives-ouvertes.fr/hal-00687350
https://hal.archives-ouvertes.fr/hal-00687350/document
https://hal.archives-ouvertes.fr/hal-00687350/file/PEER_stage2_10.1007%252Fs10950-011-9237-8.pdf
https://doi.org/10.1007/s10950-011-9237-8
Description
Summary:International audience The study of infrasound is experiencing a renaissance in recent years since it was chosen as a verification technique for the Comprehensive Nuclear-Test-Ban Treaty. Currently, 60 infrasound arrays are being installed to monitor the atmosphere for nuclear tests as part of the International Monitoring System (IMS). The number of non-IMS arrays also increases worldwide. The experimental ARCES infrasound array (ARCI) is an example of such an initiative. The detectability of infrasound differs for each array and is a function of the array location and configuration, the state of the atmosphere, and the presence of natural and anthropogenic sources. In this study, a year of infrasound data is analyzed as recorded by ARCI. Contributions of the atmosphere and the sources are evaluated in both a low- (0.1-1.0 Hz) and high-frequency (1.0-7.0 Hz) pass-band. The enormous number of detections in the low-frequency band is explained in terms of the stratospheric wind and ocean wave activity and compared with the detection of microseism. Understanding the detectability in the low-frequency band is of utmost importance for successfully applying infrasound as a verification technique since small-sized nuclear test will show up in this frequency range.

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