Infrasound observations at Syowa Station, East Antarctica: Implications for detecting the surface environmental variations in the polar regions

被引：13

作者：

Ishihara, Yoshiaki ^{[1
]}

Kanao, Masaki ^{[2
]}

Yamamoto, Masa-yuki ^{[3
]}

Toda, Shigeru ^{[4
]}

Matsushima, Takeshi ^{[5
]}

Murayama, Takahiko ^{[6
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

[2] Res Org Informat & Syst, Natl Inst Polar Res, Tachikawa, Tokyo 1908518, Japan

[3] Kochi Univ Technol, Kami, Kochi 7828502, Japan

[4] Aichi Univ Educ, Fac Educ, Kariya, Aichi 4488542, Japan

[5] Kyushu Univ, Fac Sci, Shimabara, Nagasaki 8550843, Japan

[6] Japan Weather Assoc, Toshima Ku, Tokyo 1706055, Japan

来源：

GEOSCIENCE FRONTIERS | 2015年 / 6卷 / 02期

关键词：

Antarctica; Environment; Global network; Infrasound; Microbaroms;

D O I：

10.1016/j.gsf.2013.12.012

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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 degrees E, 69 degrees 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 Lutzow-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. (c) 2015, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

引用

页码：285 / 296

页数：12

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