Acoustic thermometry for Arctic Ocean climate

Author

Mikhalevsky, Peter N. ; Muench, Robin ; Baggeroer, Arthur B.

Author_Institution

Sci. Applications Int. Corp., McLean, VA, USA

fYear

1993

fDate

18-21 Oct 1993

Abstract

Several climate models suggest that the Arctic Ocean may be one of the more sensitive indicators of global climate change. In addition to changes in the Arctic Ocean temperature, the ice pack will also respond to these changes; for example, its mean thickness, roughness and the percentage of open water will all be modulated. Low frequency acoustic propagation in the Arctic is strongly influenced by the ice pack properties since the SOFAR axis is at or near the surface. In addition to the travel time and phase changes that could be observed due to changes in the Arctic Ocean temperature; phase and amplitude coherence, travel times, transmission losses, modal coupling are just a few of the observables which would respond to changes in the pack ice. Current understanding as well as future work and possibilities for acoustic thermometry of Arctic Ocean climate are reviewed

Keywords

acoustic variables measurement; oceanographic regions; oceanographic techniques; sea ice; underwater sound; Arctic Ocean; acoustic method; acoustic thermometry; amplitude coherence; global change; ice pack; long term monitoring; modal coupling; ocean thermal structure; open water area; phase; roughness; sea ice; temperature measurement technique; thickness; transmission loss; travel time; underwater sound; Acoustic propagation; Arctic; Frequency; Ice surface; Ice thickness; Ocean temperature; Propagation losses; Rough surfaces; Sea surface; Surface roughness;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS '93. Engineering in Harmony with Ocean. Proceedings

Conference_Location

Victoria, BC

Print_ISBN

0-7803-1385-2

Type

conf

DOI

10.1109/OCEANS.1993.326001

Filename

326001