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This paper presents the analysis of noise sources such as iceberg bubbling, iceberg calving and shipping noise predominant in the Kongsfjorden fjord, Arctic sea during Summer 2016. An ambient noise measurement system comprising a hydrophone and a data acquisition system was installed in the IndArc mooring system in the Kongsfjorden region, Arctic sea, jointly deployed by National Institute of Ocean Technology (NIOT) and National Centre for Antarctic Ocean Research (NCAOR), India. The hydrophone was positioned at 30 m depth from the sea surface where the mooring depth is 190 m. The power pack for the ambient noise system has been designed for 8 months data collection. Ambient noise measurements were carried out in this region during summer 2016 covering July to October, with a sampling rate 25 kHz. Noise data sets have been acquired at a sampling time 180 s in every one hour. It is observed from the ambient noise records that the noise in Kongsfjorden ice bay in summer is strongly associated with ice breaking and shipping sources. It is observed that the shipping noise falls in the band <600 Hz and iceberg bubbling noise falls in the band >400 Hz. Instruments noise falls in the frequency 400 Hz. This research work shows that maximum ambient noise is produced at frequencies less than 2 kHz, in summer. Also ship noise has increased when compared to the previous year data. The main aim of this study is to understand the arctic acoustic environment from the continuous data sets, noise due to ice melting in location Kongsfjorden fjord and its usefulness in climate change studies.
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