%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Marsan, D.
%A Weiss, J.
%A Métaxian, Jean-Philippe
%A Grangeon, J.
%A Roux, P. F.
%A Haapala, J.
%T Low-frequency bursts of horizontally polarized waves in the Arctic sea-ice cover
%D 2011
%L PAR00007909
%G ENG
%J Journal of Glaciology
%@ 0022-1430
%M ISI:000294083700004
%N 202
%P 231-237
%U https://www.documentation.ird.fr/hor/PAR00007909
%V 57
%W Horizon (IRD)
%X We report the detection of bursts of low-frequency waves, typically f=0.025 Hz, on horizontal channels of broadband seismometers deployed on the Arctic sea-ice cover during the DAMOCLES (Developing Arctic Modeling and Observing Capabilities for Long-term Environmental Studies) experiment in spring 2007. These bursts have amplitudes well above the ambient ice swell and a lower frequency content. Their typical duration is of the order of minutes. They occur at irregular times, with periods of relative quietness alternating with periods of strong activity. A significant correlation between the rate of burst occurrences and the ice-cover deformation at the similar to 400 km scale centered on the seismic network suggests that these bursts are caused by remote, episodic deformation involving shearing across regional-scale leads. This observation opens the possibility of complementing satellite measurements of ice-cover deformation, by providing a much more precise temporal sampling, hence a better characterization of the processes involved during these deformation events.
%$ 021 ; 064