Arctic underwater noise transients from sea ice deformation: characteristics, annual time series, and forcing in Beaufort Sea - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the Acoustical Society of America Année : 2015

Arctic underwater noise transients from sea ice deformation: characteristics, annual time series, and forcing in Beaufort Sea

Résumé

A 13-month time series of Arctic Ocean noise from the marginal ice zone of Eastern Beaufort Sea is analyzed to detect under-ice acoustic transients isolated from ambient noise with a dedicated algorithm. Noise transients due to ice cracking, fracturing, shearing, and ridging are sorted out into 3 categories: broadband impulses, frequency modulated (FM) tones, and high-frequency broadband noise. Their temporal and acoustic characteristics over the 8-month ice covered period, from November 2005 to mid-June 2006, are presented and their generation mechanisms are discussed. Correlations analyses showed that the occurrence of these ice transients responded to large-scale ice motion and deformation rates forced by meteorological events, often leading to opening of large-scale leads at main discontinuities in the ice cover. Such a sequence, resulting in the opening of a large lead, hundreds by tens km in size, along the margin of landfast ice and multiyear ice plume in Beaufort-Chukchi seas is detailed. These ice transients largely contribute to the soundscape properties of the Arctic Ocean, for both its ambient and total noise components. Some FM tonal transients can be confounded with marine mammal songs, especially when they are repeated, with periods similar to wind generated waves.
Fichier principal
Vignette du fichier
2015_JASA_Kinda.pdf (3.82 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01199284 , version 1 (15-09-2015)

Identifiants

Citer

G Bazile Kinda, Yvan Simard, Cedric Gervaise, Jerome I. Mars, Louis Fortier. Arctic underwater noise transients from sea ice deformation: characteristics, annual time series, and forcing in Beaufort Sea. Journal of the Acoustical Society of America, 2015, 138 (4), pp.2034-2045. ⟨10.1121/1.4929491⟩. ⟨hal-01199284⟩
184 Consultations
277 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More