TY - JOUR
T1 - Time–space variations in infrasound sources related to environmental dynamics around Lützow–Holm Bay, east Antarctica
AU - Murayama, Takahiko
AU - Kanao, Masaki
AU - Yamamoto, Masa Yuki
AU - Ishihara, Yoshiaki
AU - Matsushima, Takeshi
AU - Kakinami, Yoshihiro
AU - Okada, Kazumi
AU - Miyamachi, Hiroki
AU - Nakamoto, Manami
AU - Takeuchi, Yukari
AU - Toda, Shigeru
N1 - Funding Information:
We would like to appreciate to many people who collaborated in the infrasound observations at SYO and around LHB, including members of the Japanese Antarctic Research Expeditions (JARE). The authors acknowledge the National Aeronautics and Space Administration (NASA) for the use of MODIS images. This work was supported by JSPS KAKENHI (Grant Number 26241010, Dr. Masaki Kanao ? Principal Investigator). We would also like to thank to the referees, Prof. Takeshi Yamanouchi (Editor-in-Chief), and Prof. Dapeng Zhao of Tohoku University (managing editor) for their editorial assistance in publishing this article in Polar Science. The authors declare that they have no competing interests with regards to the content of this work.
Funding Information:
We would like to appreciate to many people who collaborated in the infrasound observations at SYO and around LHB, including members of the Japanese Antarctic Research Expeditions (JARE). The authors acknowledge the National Aeronautics and Space Administration (NASA) for the use of MODIS images. This work was supported by JSPS KAKENHI (Grant Number 26241010 , Dr. Masaki Kanao – Principal Investigator). We would also like to thank to the referees, Prof. Takeshi Yamanouchi (Editor-in-Chief), and Prof. Dapeng Zhao of Tohoku University (managing editor) for their editorial assistance in publishing this article in Polar Science. The authors declare that they have no competing interests with regards to the content of this work.
Publisher Copyright:
© 2017
PY - 2017/12
Y1 - 2017/12
N2 - Characteristic features of infrasound waves observed in the Antarctic reflect the physical interaction between the surface environment along the continental margin and the surrounding Southern Ocean. The temporal–spatial variability of the source locations for infrasound excitation during the eight-month period between January and August 2015 was investigated using recordings made by two infrasound arrays deployed along a section of the coast of Lützow–Holm Bay (LHB), Antarctica. The infrasound arrays clearly detected temporal variations in frequency content and propagation direction during this period. A number of infrasound sources were identified, many located north of the arrays. Many of the events had a predominant frequency content of a few Hz, higher than microbaroms from the ocean. A comparison of the results with MODIS satellite images indicated that these infrasound sources were ice-quakes associated with the calving of glaciers, the breaking off of sea ice, and collisions between this sea ice and icebergs around the LHB. Continuous measurements of infrasound in the Antarctic may serve as a proxy for monitoring the regional surface environment in terms of climate change at high southern latitudes.
AB - Characteristic features of infrasound waves observed in the Antarctic reflect the physical interaction between the surface environment along the continental margin and the surrounding Southern Ocean. The temporal–spatial variability of the source locations for infrasound excitation during the eight-month period between January and August 2015 was investigated using recordings made by two infrasound arrays deployed along a section of the coast of Lützow–Holm Bay (LHB), Antarctica. The infrasound arrays clearly detected temporal variations in frequency content and propagation direction during this period. A number of infrasound sources were identified, many located north of the arrays. Many of the events had a predominant frequency content of a few Hz, higher than microbaroms from the ocean. A comparison of the results with MODIS satellite images indicated that these infrasound sources were ice-quakes associated with the calving of glaciers, the breaking off of sea ice, and collisions between this sea ice and icebergs around the LHB. Continuous measurements of infrasound in the Antarctic may serve as a proxy for monitoring the regional surface environment in terms of climate change at high southern latitudes.
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U2 - 10.1016/j.polar.2017.10.001
DO - 10.1016/j.polar.2017.10.001
M3 - Article
AN - SCOPUS:85033227591
SN - 1873-9652
VL - 14
SP - 39
EP - 48
JO - Polar Science
JF - Polar Science
ER -
