Passive acoustic monitoring of ocean weather patterns

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Ambient underwater noise can act as markers of weather patterns and human effects; it can also significantly affect sonar performance. Acoustic measurements of ambient noise were conducted in Kongsfjorden, Svalbard, in summer 2007. They were taken with a broadband hydrophone (100 Hz - 48 kHz effective bandwidth), deployed ∼9.5-m deep at regular intervals from the mouth of the fjord toward the glaciers at its inner end. These measurements include ambient noise from wind and small waves, light rain, large ships, marine mammals and different types of freshwater growlers and bergy bits. Principal Component Analysis (PCA) of the frequency variations, averaged over 1-kHz bands, confirms and extends other studies in different environments. PCA results clearly distinguish weather patterns, the presence of icebergs and other contributions to ambient noise underwater. Laboratory experiments complement these observations and their interpretation. These field measurements are, to our knowledge, the first noise recordings taken in this environmentally significant region of the Arctic. They provide a first dataset on which to base analyses of the area's evolution with ocean weather patterns, climate change and anthropogenic activities.
Original languageEnglish
Title of host publicationProceedings of the Institute of Acoustics
Subtitle of host publicationConference on Underwater Noise Measurement, Impact and Mitigation 2008
PublisherInstitute of Acoustics
Pages85-92
Number of pages8
Volume30
Publication statusPublished - 2008
EventConference on Underwater Noise Measurement, Impact and Mitigation 2008 - Southampton, UK United Kingdom
Duration: 13 Oct 200814 Oct 2008

Publication series

NameProceedings of the Institute of Acoustics
Number5
Volume30

Conference

ConferenceConference on Underwater Noise Measurement, Impact and Mitigation 2008
CountryUK United Kingdom
CitySouthampton
Period13/10/0814/10/08

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