Accession Number:

ADA275344

Title:

Volume Reverberation in the Marginal Ice Zone of Fram Strait

Descriptive Note:

Final rept.

Corporate Author:

NAVAL RESEARCH LAB STENNIS SPACE CENTER MS

Personal Author(s):

Report Date:

1993-01-01

Pagination or Media Count:

6.0

Abstract:

Many measurements of volume reverberation have been conducted in the open oceans of the world. In May 1988, the Naval Research Laboratory at Stennis Space Center NRL-SSC had the opportunity to investigate volume reverberation in a unique region the marginal ice zone MIZ of the Fram Strait between Spitsbergen and Greenland. Measurements were made from a drifting ice camp at three locations over a four day period. Volume scattering strength versus depth profiles were obtained at frequencies from 3.5 to 50 kHz using short CW pulses from a suite of downward and upward looking transducers. Results show that scattering layers occurred from about 100 to 200 m and 400 to 500 m at each location, with some variability in strength at the different locations. A comparison with volume scattering strengths reported from other cold water regions shows that values observed in the Fram Strait MIZ were lower than those reported at similar frequencies from open waters of the Norwegian Sea, Labrador Sea, and northern Baffin Bay, and comparable to those in the Denmark Strait, Davis Strait, Chukchi Sea MIZ, and northeast of Iceland. Acoustic propagation, Sea ice, Arctic Ocean.

Subject Categories:

  • Snow, Ice and Permafrost
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE