Effects of On-Site Weather Conditions on the Detection Capability of the Infrasound Station of Madagascar I33MG
Effects of On-Site Weather Conditions on the Detection Capability of the Infrasound Station of Madagascar I33MG作者机构：Institute and Observatory of Geophysics of Antananarivo University of Antananarivo Antananarivo Madagascar Commissariat à l’Energie Atomique et Energies Renouvelables DASE/LDG Bruyères Le Chatel France Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) Vienna Austria
出 版 物：《Atmospheric and Climate Sciences》 (大气和气候科学（英文）)
年 卷 期：2022年第12卷第2期
页 面：297-312页
学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学]
主 题：Temperature Wind Speed Noise Power Detection Infrasound
摘 要：Noise due to surface wind and temperature is a problem in infrasound. Efficiency of IMS network concerns scientists. It is obvious to find the causes of deficiencies of detection of infrasound station by studying background noise power with respect to the surface wind and the temperature. Data measured by MB2000 microbarometer of infrasound station I33MG are used for the study. Infrasound records are separated into 4 frequency bands centered respectively at: 1 Hz, 0.25 Hz, 0.0625 Hz and 0.0156 Hz. Effects of surface wind and temperature are studied by plotting the variations of the background noise power with respect to the temperature or wind speed in the four considered frequency bands and compared with the median of background noise power. The influence of temperature is manifested by a reduction in the number of low-frequency detection. The surface wind reduces the number of detection at a high frequency. An exponential function is proposed to predict the variations of the noise power in different observation frequencies and temperature and wind conditions. The views expressed herein are those of the authors and do not necessarily reflect the views of the CTBTO Preparatory Commission.
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