Environmental acoustic noise observations in Tethys Bay (Terra Nova Bay, Ross Sea, Antarctica)

摘要: Underwater acoustic measurements have been recently carried out in Tethys Bay (Ross Sea, Antarctica) during the XXIX Italian Antarctic Expedition to support propagation studies area and investigate environmental noise. is a small deep cove close base Mario Zucchelli Station (Baia Terra Nova −74°42' S e 164°07' E) covered with sea-ice for most of year. During period experiment (November 2013) pack-ice had an almost constant thickness about 2.2 m, so that were performed deploying instruments into sea from holes drilled through pack ice. The located along bay axis at distance 500 m each other. depth was around 200 except hole coast, where only 25 m. An hydrophone RESON TC 4032 outermost hole, while source, transceiver transmitting FSK pulses 11 kHz, placed sequence other three holes. Every time, 0, 20 45 configuration. Furthermore experiment, temperature, salinity currents, as well main meteorological parameters continuously measured. analysis here reported mainly focuses on acquired passive data. evidenced signal generally dominated by different sounds seals, which prevailing noise due human activities.