TY - JOUR
T1 - Infrasound observations at Syowa Station, East Antarctica
T2 - Implications for detecting the surface environmental variations in the polar regions
AU - Ishihara, Yoshiaki
AU - Kanao, Masaki
AU - Yamamoto, Masa Yuki
AU - Toda, Shigeru
AU - Matsushima, Takeshi
AU - Murayama, Takahiko
N1 - Funding Information:
We would like to express our sincere appreciation to many collaborators in the infrasound observations at SYO, as well as related members of the Japanese Antarctic Research Expeditions (JARE; Prof. Kazuyuki Shiraishi, Director-General of NIPR, Dr. Yuichi Aoyama of NIPR and many other members). The authors would like to express their special thanks to Prof. Richard Aster of New Mexico Institute of Mining and Technology, for his fruitful comments on our study. We also thank all the members of IPY Antarctic projects of the POLENET (Prof. Terry Wilson of the Ohio State University, and other members). Infrasound observation at SYO was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (B) 19740265, 2007 (P.I. for Dr. Yoshiaki Ishihara). A part of data retrieval from SYO to Japan and initial processings had been sincerely conducted by Mr. Toshifumi Suzuki and Mr. Takayasu Komatsu, Kochi University of Technology. We would also like to express sincere appreciation to one anonymous referee and Profs. M. Santosh and X. X. Mo of China University of Geosciences, Prof. Z. J. Zhang of China Academy of Science, Prof. T. Tsunogae of Tsukuba University for their sincere editorial efforts that lead to the submission of this paper to the “Geoscience Frontiers”.
Publisher Copyright:
© 2015 China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - Characteristic infrasound waves observed at Antarctic stations demonstrate physical interaction involving environmental changes in the Antarctic continent and the surrounding oceans. A Chaparral-type infrasound sensor was installed at Syowa Station (SYO; 39°E, 69°S), East Antarctica, as one of the projects of the International Polar Year (IPY2007-2008). Data continuously recorded during the three seasons in 2008-2010 clearly indicate a contamination of the background oceanic signals (microbaroms) with peaks between 4 and 10 s observed during a whole season. The peak amplitudes of the microbaroms have relatively lower values during austral winters, caused by a larger amount of sea-ice extending around the Lützow-Holm Bay near SYO, with decreasing ocean wave loading effects. Microbaroms measurements are useful tool for characterizing ocean wave climate, complementing other oceanographic and geophysical data. A continuous monitoring by infrasound sensors in the Antarctic firmly contributes to the Comprehensive Nuclear-Test-Ban Treaty (CTBT) in the southern high latitude, together with the Pan-Antarctic Observations System (PAntOS) under the Scientific Committee on Antarctic Research (SCAR). Detailed measurements of the infrasound waves in Antarctica, consequently, could be a new proxy for monitoring regional environmental change as well as the temporal climate variations in the polar regions.
AB - Characteristic infrasound waves observed at Antarctic stations demonstrate physical interaction involving environmental changes in the Antarctic continent and the surrounding oceans. A Chaparral-type infrasound sensor was installed at Syowa Station (SYO; 39°E, 69°S), East Antarctica, as one of the projects of the International Polar Year (IPY2007-2008). Data continuously recorded during the three seasons in 2008-2010 clearly indicate a contamination of the background oceanic signals (microbaroms) with peaks between 4 and 10 s observed during a whole season. The peak amplitudes of the microbaroms have relatively lower values during austral winters, caused by a larger amount of sea-ice extending around the Lützow-Holm Bay near SYO, with decreasing ocean wave loading effects. Microbaroms measurements are useful tool for characterizing ocean wave climate, complementing other oceanographic and geophysical data. A continuous monitoring by infrasound sensors in the Antarctic firmly contributes to the Comprehensive Nuclear-Test-Ban Treaty (CTBT) in the southern high latitude, together with the Pan-Antarctic Observations System (PAntOS) under the Scientific Committee on Antarctic Research (SCAR). Detailed measurements of the infrasound waves in Antarctica, consequently, could be a new proxy for monitoring regional environmental change as well as the temporal climate variations in the polar regions.
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U2 - 10.1016/j.gsf.2013.12.012
DO - 10.1016/j.gsf.2013.12.012
M3 - Article
AN - SCOPUS:84925439633
VL - 6
SP - 285
EP - 296
JO - Geoscience Frontiers
JF - Geoscience Frontiers
SN - 1674-9871
IS - 2
ER -