Long-termInfrasound data at Syowa Station (SYO; 39E, 69S), in the Lützow-Holm Bay (LHB),
East Antarctica was analyzed during the period from 2008 to 2014. Seasonal
variations in microbaroms and high-frequency harmonic tremors were especially
investigated. Infrasound data were strongly involved in local dynamics of
surface environments. The microbaroms have relatively low amplitudes in austral
winters by extending area of sea-ice around LHB, with decreasing oceanic swell
loading effects. The other reasons of seasonal variations in microbaroms
amplitudes were caused by the affections of a number of storms during whole
year and snow accumulation over the porous hoses on the infrasound station at
SYO. In contrast, non-linear high-frequency harmonic tremors were considered to
be caused by the katabatic winds from Antarctic continent flowing in northeast
dominant orientation. The high-frequency tremors had characteristics of daily
variations in particular in austral summer. It is required to continue more
than a few years of observation in order to identify relationships with climate
change and global warming effects in the Antarctic. Continuous measurement of infrasound
in the coastal margin of Antarctica is a proxy for monitoring multi-sphere
interaction between the continent and surrounding Southern Ocean.
References
[1]
Hedlin, M.A.H. and Garces, M.A., Bass, H., Hayward, C. and Herrin, G., Olson, J.V. and Wilson, C. (2002) Listening to the Secret Sounds of Earth’s Atmosphere. Eos Transactions American Geophysical Union, 83, 564-565. https://doi.org/10.1029/2002eo000383
[2]
Arai, N., Iwakuni, M., Watada, S., Imanishi, Y., Murayama, T. and Nogami, M. (2011) Atmospheric Boundary Waves Excited by the Tsunami Generation Related to the 2011 Great Tohoku-Oki Earthquake. Geophysical Research Letters, 38, Article ID: L00G18. https://doi.org/10.1029/2011gl049146
[3]
Matoza, R.S., Hedlin, M.A.H. and Garces, M.A. (2007) An Infrasound Array Study of Mount St. Helens. Journal of Volcanology and Geothermal Research, 160, 249-262. https://doi.org/10.1016/j.jvolgeores.2006.10.006
[4]
Arrowsmith, S.J., Hedlin, M.A.H., Ceranna, L. and Edwards, W. (2005) An Analysis of Infrasound Signals from the June 3rd, 2004 Fireball Over Washington State. InfraMatics, 10, 14-21.
[5]
Le Pichon, A., Blanc, E. and Drob, D. (2005) Probing High-Altitude Winds Using Infrasound. Journal of Geophysical Research, 110, Article ID: D20104. https://doi.org/10.1029/2005jd006020
Wilson, C.R. (2005) Infrasound from Auroral Electrojet Motions at I53US. InfraMatics, 10, 1-13.
[8]
Ishihara, Y., Furumoto, M., Sakai, S. and Tsukuda, S. (2004) The 2003 Kanto Large Bolide’s Trajectory Determined from Shockwaves Recorded by a Seismic Network and Images Taken by a Video Camera. Geophysical Research Letters, 31, Article ID: L14702. https://doi.org/10.1029/2004gl020287
[9]
Yamamoto, M.-Y., Ishihara, Y., Hiramatsu, Y., Kitamura, K., Ueda, M., Shiba, Y., Furumoto, M. and Fujita, K. (2011) Detection of Acoustic/Infrasonic/Seismic Waves Generated by Hypersonic Reentry of HAYABUSA Capsule and Fragmented Parts of Spacecraft. Publications of the Astronomical Society of Japan, 63, 971-978. https://doi.org/10.1093/pasj/63.5.971
[10]
Ishihara, Y., Hiramatsu, Y., Yamamoto, M.-Y., Furumoto, M. and Fujita, K. (2012) Infrasound/Seismic Observation of the Hayabusa Reentry: Observations and Preliminary Results. Earth Planets Space, 64, 655-660. https://doi.org/10.5047/eps.2012.01.003
[11]
Kanao, M., Maggi, A., Ishihara, Y., Yamamoto, M.-Y., Nawa, K., Yamada, A., Wilson, T., Himeno, T., Toyokuni, G., Tsuboi, S., Tono, Y. and Anderson, K. (2012) Seismic Wave Interactions between the Atmosphere-Ocean-Cryosphere System and the Geosphere in Polar Regions. In: Kanao, M., Takenaka, H., Murai, Y., Matsushima, J. and Toyokuni, G., Eds., Seismic Waves—Research and Analysis, InTech, Rijeka, Croatia, 1-20. https://doi.org/10.5772/23410
[12]
Yamamoto, M.-Y., Ishihara, Y. and Kanao, M. (2013) Infrasonic Waves in Antarctica: A New Proxy for Monitoring Polar Environment. International Journal of Geosciences, 4, 797-802. https://doi.org/10.4236/ijg.2013.44074
[13]
Ishihara, Y., Kanao, M., Yamamoto, M.-Y., Toda, S., Matsushima, T. and Murayama, T. (2015) Infrasound Observations at Syowa Station, East Antarctica: Implications for Detecting the Surface Environmental Variations in the Polar Regions. Geoscience Frontiers, 6, 285-296.
[14]
Murayama, T., Kanao, M., Yamamoto, M.-Y., Ishihara, Y., Matshushima, T. and Kakinami, Y. (2015) Infrasound Array Observations in the Lützow-Holm Bay region, East Antarctica. Polar Science, 9, 35-50.
[15]
Kanao, M., Maggi, A., Ishihara, Y., Stutzmann, E., Yamamoto, M.-Y. and Toyokuni, G. (2013) Characteristic Atmosphere-Ocean-Solid Earth Interactions in the Antarctic Coastal and Marine Environment Inferred from Seismic and Infrasound Recording at Syowa Station, East Antarctica. In: Hambrey, M.J., et al., Eds., Antarctic Palaeoenvironments and Earth-Surface Processes, ISAES Vol. III, Geological Society, London, Special Publications, Vol. 381, 469-480. https://doi.org/10.1144/SP381.8
[16]
Grob, M., Maggi, A. and Stutzmann, E. (2011) Observations of the Seasonality of the Antarctic Microseismic Signal, and Its Association to Sea Ice Variability. Geophysical Research Letters, 38, Article ID: L11302. https://doi.org/10.1029/2011gl047525
[17]
Hedlin, M.A.H. and Alcoverro, B. (2005) The Use of Impedance Matching Capillaries for Reducing Resonance in Rosette Infrasonic Spatial Filters. The Journal of the Acoustical Society of America, 117, 1880-1888. https://doi.org/10.1121/1.1760778
[18]
Hanson, J., Bras, R.L., Brumbaugh, D., Guern, J., Dysart, P. and Gault, A. (2001) Operational Processing of Hydroacoustics at the Prototype International Data Center. In: de Groot-Hedlin, C. and Orcutt, J., Eds., Monitoring the Comprehensive Nuclear-Test-Ban Treaty: Hydroacoustics, Birkhäuser, Basel, 425-456. https://doi.org/10.1007/978-3-0348-8270-5_2
