A climatology of infrasound detections in northern Norway at the experimental ARCI array
Abstract 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 M...
| Published in: | Journal of Seismology |
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| Language: | English |
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Springer Netherlands
2012
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| Online Access: | http://hdl.handle.net/2262/63046 https://doi.org/10.1007/s10950-011-9237-8 |
| Summary: | Abstract 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. phone: +31-30-2206335 (Evers, Laslo Gerardus) evers@knmi.nl (Evers, Laslo Gerardus) johannes@norsar.no (Schweitzer, Johannes) Seismology Division, Royal Netherlands Meteorological Institute - PO Box 201 - 3730 AE - De Bilt - NETHERLANDS (Evers, Laslo Gerardus) Acoustic Remote Sensing Group, Faculty of Aerospace Engineering, TU Delft - PO Box 5 - 2600 AA - Delft - NETHERLANDS (Evers, Laslo Gerardus) NORSAR - PO Box 53 - 2027 - Kjeller - NORWAY (Schweitzer, Johannes) NETHERLANDS NORWAY Registration: 2011-03-18 Received: 2009-08-20 Accepted: 2011-03-17 ePublished: 2011-04-13 |
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