Approved for public release; distribution is unlimited / During the month of July 1987 an acoustical experiment was
conducted by the United States Naval Research Laboratory (NRL)
in the East Greenland Sea Marginal Ice Zone (MIZ) . Ambient
noise "hot spots" or concentrated areas of relatively high
noise levels were found along the ice edge using a towed
array. Ambient noise levels were obtained on 27 and 28 July
using AN/SSQ-57A and AN/SSQ-57XN5 calibrated sonobuoys . The
temperature structure of the area was determined using XBT
(ship) and AXBT (P3C aircraft) buoys placed inside and outside
the ice edge. The ice edge was determined from coincident
satellite photos, 90 GHz microwave imagery and P3 radar ice
edge maps. Weather data (sea state and wind speed and direction)
were recorded on the ship. The data seem to indicate a correlation between the high ambient noise levels of the hot
spots and the presence of a large topographically controlled
mesoscale eddy located at the southeastern extent of the MIZ. / http://archive.org/details/spatialvariabili00bigg / Lieutenant, United States Navy
| Identifer | oai:union.ndltd.org:nps.edu/oai:calhoun.nps.edu:10945/23402 |
| Date | 12 1900 |
| Creators | Biggs, Kristian Pedersen |
| Contributors | Bourke, Robert H., Medwin, Herman, Naval Postgraduate School (U.S.), Engineering Acoustics |
| Source Sets | Naval Postgraduate School |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
| Format | 101 p., application/pdf |
| Rights | This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
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