Accession Number:

ADA242001

Title:

Arctic Ambient Noise

Descriptive Note:

Final rept.

Corporate Author:

SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB

Personal Author(s):

Report Date:

1991-06-01

Pagination or Media Count:

3.0

Abstract:

Analysis was made of Arctic ambient noise data taken in a 1988 experiment. In 1988, the Canadian Defense Research Establishment Pacific carried out an Arctic ambient noise experiment. A 24-element vertical array was deployed as well as several individual sensors at various horizontal ranges from the vertical array. Selected segments of the data set were requested and obtained from DREP. These included quiet periods and active periods various types of ice cracking events. A number of analyses were performed on the data including 1 time series plots, 2 time-evolving power plots, 3 power spectra of the individual hydrophones, and 4 narrowband and broadband beamforming of the vertical array data. In general, it was found that the arctic ambient noise levels in this data set varied over a large range depending on the number of ice cracking events. These levels ranged from lower to higher than normally observed NE Pacific deep ocean data. The beamformed data was revealing in that it indicated the presence of a number of transient events that appear to be related to ice cracking activity.

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE