STUDIES IN MARINE GEOPHYSICS AND UNDERWATER SOUND FROM DRIFTING ICE STATIONS.

The detailed drift of T-3 from May 1962 to June 1969 is plotted from over 9000 celestial and satellite fixes processed entirely by digital computer. Over 14,000 km of precision depth profiles show detailed topography of parts of the Northwind Ridge, Chuckchi Rise, Mendeleyev Ridge, Alpha Cordillera,...

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Bibliographic Details
Main Authors: Hunkins,Kenneth L., Kutschale,Henry W., Hall,John K.
Other Authors: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES N Y
Format: Text
Language:English
Published: 1969
Subjects:
Seismology
Snow
Ice and Permafrost
Acoustics
(*MARINE GEOPHYSICS
*ARCTIC OCEAN)
(*UNDERWATER SOUND
*ICE ISLANDS)
DRIFT
ECHO RANGING
REFLECTION
SEDIMENTATION
THICKNESS
STRUCTURAL GEOLOGY
SOUND TRANSMISSION
OCEAN WAVES
SCATTERING
METEOROLOGICAL SATELLITES
DATA PROCESSING
OCEAN CURRENTS
ARLIS 2 ICE ISLAND
FLETCHERS ICE ISLAND
SEISMIC NOISE
Alpha Cordillera
Arctic
Arctic Ocean
Canada
Canada Plain
Mendeleyev
Mendeleyev Ridge
Wrangel Plain
Ice
Ice Sheet
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0696997
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0696997
Description
Summary:The detailed drift of T-3 from May 1962 to June 1969 is plotted from over 9000 celestial and satellite fixes processed entirely by digital computer. Over 14,000 km of precision depth profiles show detailed topography of parts of the Northwind Ridge, Chuckchi Rise, Mendeleyev Ridge, Alpha Cordillera, Wrangel Plain, Canada Plain, and Chuckchi Plain. Over 4,500 km of continuous seismic reflection profile show sediment thicknesses of about 1 km on the ridges to more than 3.5 km under Wrangel Plain. Over 49,000 magnetic and 10,000 gravity measurements have helped to delineate regional geologic structure and crustal movements. The sound scattering layer in the Arctic was discovered on precision depth recordings. Long-range sound propagation in the Arctic SOFAR channel is described by ray and normal mode theory. The normal mode treatment for the channel bounded above by a rough ice sheet is in remarkably good agreement with acoustic signatures from distant explosions. The Ekman current spiral was verified. This is the first quantitative verification of Ekman's theory in any deep ocean. The first observations of seismic noise on the Arctic Ocean floor were made aboard ice island ARLIS II. (Author)

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