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Assink, J.D. (author), Waxler, R. (author), Smets, P.S.M. (author), Evers, L.G. (author)In January 2011, the state of the polar vortex in the midlatitudes changed significantly due to a minor sudden stratospheric warming event. As a result, a bidirectional duct for infrasound propagation developed in the middle atmosphere that persisted for 2 weeks. The ducts were due to two zonal wind jets, one between 30 and 50 km and the other...journal article 2014
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- Brown, P.G. (author), Assink, J.D. (author), Astiz, L. (author), Blaauw, R. (author), Boslough, M.B. (author), Borovicka, J. (author), Brachet, N. (author), Brown, D. (author), Campbell-Brown, M. (author), Ceranna, L. (author), Cooke, W. (author), de Groot-Hedin, C. (author), Drob, D.P. (author), Edwards, W. (author), Evers, L.G. (author), Garces, M. (author), Gill, J. (author), Hedlin, M. (author), Kingery, A. (author), Laske, G. (author), le Pichon, A. (author), Mialle, P. (author), Moser, D.E. (author), Saffer, A. (author), Silber, E. (author), Smets, P.S.M. (author), Spalding, R.E. (author), Spurny, P. (author), Tagliaferri, E. (author), Uren, D. (author), Weryk, J. (author), Whitaker, R. (author), Krzeminski, Z. (author) journal article 2013
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Le Pichon, A. (author), Assink, J.D. (author), Heinrich, P. (author), Blanc, E. (author), Charlton-Perez, A. (author), Lee, C.F. (author), Keckhut, P. (author), Hauchecorne, A. (author), Rufenacht, R. (author), Kampfer, N. (author), Drob, D.P. (author), Smets, P.S.M. (author), Evers, L.G. (author), Ceranna, L. (author), Pilger, C. (author), Ross, O. (author), Claud, C. (author)High-resolution, ground-based and independent observations including co-located wind radiometer, lidar stations, and infrasound instruments are used to evaluate the accuracy of general circulation models and data-constrained assimilation systems in the middle atmosphere at northern hemisphere midlatitudes. Systematic comparisons between...journal article 2015
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Evers, L.G. (author), Brown, D. (author), Heaney, K.D. (author), Assink, J.D. (author), Smets, P.S.M. (author), Snellen, M. (author)Atmospheric low-frequency sound, i.e., infrasound, from underwater events has not been considered thus far, due to the high impedance contrast of the water-air interface making it almost fully reflective. Here we report for the first time on atmospheric infrasound from a large underwater earthquake (Mw 8.1) near the Macquarie Ridge, which was...journal article 2014
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Averbuch, G. (author), Assink, Jelle D. (author), Smets, P.S.M. (author), Evers, L.G. (author)Low-frequency acoustic, i.e., infrasound, waves are measured by sparse arrays of microbarometers. Recorded data are processed by automatic detection algorithms based on array-processing techniques such as time-domain beam forming and f-k analysis. These algorithms use a signal-to-noise ratio (S/N) value as a detection criterion. In the case...journal article 2018
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Patrick, Samantha C. (author), Assink, Jelle D. (author), Basille, Mathieu (author), Clusella-Trullas, Susana (author), Clay, Thomas A. (author), den Ouden, O.F.C. (author), Joo, Rocío (author), Evers, L.G. (author), Smets, P.S.M. (author)Seabirds are amongst the most mobile of all animal species and spend large amounts of their lives at sea. They cross vast areas of ocean that appear superficially featureless, and our understanding of the mechanisms that they use for navigation remains incomplete, especially in terms of available cues. In particular, several large-scale...journal article 2021
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den Ouden, O.F.C. (author), Smets, P.S.M. (author), Assink, Jelle D. (author), Evers, L.G. (author)A method is introduced to reconstruct microbarom soundscapes in absolute values. The soundscapes are compared to remote infrasound recordings from infrasound array I23FR (Kerguelen Island) and in situ recordings by the INFRA-EAR, a biologger deployed near the Crozet Islands. The reconstruction method accounts for all-acoustic contributions,...journal article 2021
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Shani-Kadmiel, Shahar (author), Averbuch, G. (author), Smets, P.S.M. (author), Assink, Jelle (author), Evers, L.G. (author)In the days following the January 12, 2010 M<sub>w</sub> 7 Haiti earthquake the shaking intensity near the epicenter was overestimated and the spatial extent of the potentially damaging shaking was underestimated. This was due to the lack of seismometers in the near-source region at the time of the earthquake. Besides seismic waves,...journal article 2021
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den Ouden, O.F.C. (author), Assink, Jelle D. (author), Oudshoorn, Cornelis D. (author), Filippi, Dominique (author), Evers, L.G. (author)Geophysical studies and real-time monitoring of natural hazards, such as volcanic eruptions or severe weather events, benefit from the joint analysis of multiple geophysical parameters. However, typical geophysical measurement platforms still provide logging solutions for a single parameter, due to different community standards and the higher...journal article 2021
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Smets, P.S.M. (author), Assink, J. D. (author), Le Pichon, A. (author), Evers, L.G. (author)Accurate prediction of Sudden Stratospheric Warming (SSW) events is important for the performance of numerical weather prediction due to significant stratosphere-Troposphere coupling. In this study, for the first time middle atmospheric numerical weather forecasts are evaluated using infrasound. A year of near-continuous infrasound from the...journal article 2016
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Assink, J. D. (author), Averbuch, G. (author), Smets, P.S.M. (author), Evers, L.G. (author)The underground nuclear tests by the Democratic People's Republic of Korea (DPRK) generated atmospheric infrasound both in 2013 and 2016. Clear detections were made in the Russian Federation (I45RU) and Japan (I30JP) in 2013 at stations from the International Monitoring System. Both tropospheric and stratospheric refractions arrived at the...journal article 2016
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den Ouden, O.F.C. (author), Assink, Jelle D. (author), Smets, P.S.M. (author), Evers, L.G. (author)The ambient infrasonic noise field is complex due to the interference of spatially distributed infrasound sources. Microbaroms are one of the most dominant omnipresent infrasonic sources within this wavefield. These microbaroms are generated by nonlinear ocean surface wave interactions, and have a characteristic and continuous signature...journal article 2022
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Evers, L.G. (author), Smets, P.S.M. (author), Assink, J. D. (author), Shani-Kadmiel, Shahar (author), Kondo, K. (author), Sugiyama, S. (author)A period of 18 years of infrasonic recordings was analyzed from a microbarometer array (I18DK) in northwestern Greenland, near Qaanaaq. A huge number of infrasonic detections, over 700,000, have been made in I18DKs soundscape during the Arctic summers. Simultaneously identified were both calving events from marine-terminating glaciers and...journal article 2022
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Blanc, E (author), Ceranna, L. (author), Hauchecorne, A (author), Charlton-Perez, A (author), Marchetti, E. (author), Evers, L.G. (author), Kvaerna, T (author), Lastovicka, J. (author), Eliasson, L. (author), Crosby, N. B. (author), Blanc-Benon, P. (author), le Pichon, A (author), Brachet, N (author), Pilger, C (author), Keckhut, P (author), Assink, J. D. (author), Smets, P.S.M. (author), Lee, C. F. (author), Kero, J. (author), Sindelarova, T. (author), Kämpfer, N. (author), Rüfenacht, R. (author), Farges, T. (author), Millet, C. (author), Näsholm, S. P. (author), Gibbons, S. J. (author), Espy, P. J. (author), Hibbins, R. E. (author), Heinrich, P (author), Ripepe, M (author), Khaykin, S. (author), Mze, N. (author), Chum, J. (author)This paper reviews recent progress toward understanding the dynamics of the middle atmosphere in the framework of the Atmospheric Dynamics Research InfraStructure in Europe (ARISE) initiative. The middle atmosphere, integrating the stratosphere and mesosphere, is a crucial region which influences tropospheric weather and climate. Enhancing...journal article 2018
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Averbuch, G. (author), Assink, Jelle D. (author), Evers, L.G. (author)In seismology and ocean acoustics, the interface with the atmosphere is typically represented as a free surface. Similarly, these interfaces are considered as a rigid surface for infrasound propagation. This implies that seismic or acoustic waves are not transmitted into the atmosphere from subsurface sources, and vice versa. Nevertheless,...journal article 2020
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Shani-Kadmiel, Shahar (author), Assink, Jelle D. (author), Smets, P.S.M. (author), Evers, L.G. (author)In this study we analyze infrasound signals from three earthquakes in central Italy. The M<sub>w</sub> 6.0 Amatrice, M<sub>w</sub> 5.9 Visso, and M<sub>w</sub> 6.5 Norcia earthquakes generated significant epicentral ground motions that couple to the atmosphere and produce infrasonic waves. Epicentral seismic and infrasonic signals are...journal article 2018
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den Ouden, O.F.C. (author), Assink, Jelle D. (author), Smets, P.S.M. (author), Shani-Kadmiel, Shahar (author), Averbuch, G. (author), Evers, L.G. (author)The detection and characterization of signals of interest in the presence of (in)coherent ambient noise is central to the analysis of infrasound array data. Microbaroms have an extended source region and a dynamical character. From the perspective of an infrasound array, these coherent noise sources appear as interfering signals which...journal article 2020
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Evers, L.G. (author), Assink, J. D. (author), Smets, P.S.M. (author)Supersonic rockets generate low-frequency acoustic waves, that is, infrasound, during the launch and re-entry. Infrasound is routinely observed at infrasound arrays from the International Monitoring System, in place for the verification of the Comprehensive Nuclear-Test-Ban Treaty. Association and source identification are key elements of the...journal article 2018
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Smink, M.M.E. (author), Assink, Jelle D. (author), Bosveld, Fred C. (author), Smets, P.S.M. (author), Evers, L.G. (author)The Royal Netherlands Meteorological Institute (KNMI) operates a three-dimensional microbarometer array at the Cabauw Experimental Site for Atmospheric Research observatory. The array consists of five microbarometers on a meteorological tower up to an altitude of 200 m. Ten ground-based microbarometers surround the tower with an array aperture...journal article 2019