Long range transmission loss of broadband seismic pulses in the Arctic under ice-free conditions.
J Acoust Soc Am
; 128(4): EL181-7, 2010 Oct.
Article
en En
| MEDLINE
| ID: mdl-20968323
ABSTRACT
In 2008 the Louis S. St-Laurent (LSSL) surveyed deep Arctic waters using a three-airgun seismic source. Signals from the seismic survey were detected between 400 km and 1300 km range on a directional autonomous acoustic recorder deployed in water 53 m deep off the Alaskan North Slope. Observations of received signal levels between 10-450 Hz versus LSSL range roughly fit a cylindrical transmission loss model plus 0.01 dB/km attenuation in deep ice-free waters, and fit previous empirical models in ice-covered waters. The transition between ice-free and ice-covered propagation conditions shifted 200 km closer to the recorder during the survey.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Radar
/
Navíos
/
Acústica
Idioma:
En
Revista:
J Acoust Soc Am
Año:
2010
Tipo del documento:
Article