Abstract
The soundscape in the eastern Arctic was studied from April to September 2013 using a 22 element vertical hydrophone array as it drifted from near the North Pole (89° 23'N, 62° 35'W) to north of Fram Strait (83° 45'N 4° 28' W). The hydrophones recorded for 108 minutes on six days per week with a sampling rate of 1953.125 Hz. After removal of data corrupted by nonacoustic flow-related noise, 19 days throughout the transit period were analyzed. Major contributors include broadband and tonal ice noises, seismic airgun surveys, and earthquake T phase arrivals. Statistical spectral analyses show a broad peak in power at about 15 Hz similar to that previously observed and a mid-frequency fall off of about 20 dB/decade. Observations of the median noise levels with depth demonstrate the change in dominant noise sources between high (200-500 Hz) and low (10-50 Hz) frequencies as the array transited southward. The median noise levels observed are among the lowest of the sparse observations in the eastern Arctic, but comparable to noise levels reported in the western Arctic.
Published Version
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