Accession Number : AD0814902

Title :   OCEANOGRAPHIC CRUISE SUMMARY SOUTH CHINA SEA.

Descriptive Note : Informal manuscript 22 Nov 65-16 Feb 66,

Corporate Author : NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS

Personal Author(s) : Tooma, Samuel G., Jr. ; Iredale, Harry, III

Report Date : FEB 1967

Pagination or Media Count : 20

Abstract : This report describes the oceanographic survey conducted in the South China Sea during the winter monsoons from November 1965 to mid-February 1966. The survey was performed to update existing nautical charts and to expand the limited knowledge of the oceanographic environment in that area. Naval Oceanographic Office personnel collected physical and chemical oceanographic data and marine geology and bottom topography information while aboard USS REHOBOTH (AGS-50). A cursory analysis of the oceanographic data shows isothermal conditions in the upper 25 to 50 meters of the water column with the isothermal layer being deepest in the eastern part of the sea. A sharp thermocline exists between 50 and 100 meters; the gradient lessens between the thermocline and 1,100 meters. Very little change in temperature is noted below 1,100 meters. Surface salinities increase from west to east. Stable salinity structure below 100 meters is indicated with a slight negative gradient existing between 250 and 850 meters. A characteristic sound channel is evident with its axial depth at about 1,100 meters. (Author)

Descriptors :   (*OCEANOGRAPHIC DATA, SOUTH CHINA SEA), OCEAN BOTTOM SAMPLING, OCEAN BOTTOM TOPOGRAPHY, MARINE GEOLOGY, THERMOCLINES, BATHYTHERMOGRAPH DATA, SALINITY, SURFACE PROPERTIES, UNDERWATER SOUND, SOUND TRANSMISSION, WAVE PROPAGATION, OXYGEN, ACOUSTIC PROPERTIES, VELOCITY, HYDROGRAPHIC SURVEYING, NAVAL VESSELS, DIURNAL VARIATIONS, PERIODIC VARIATIONS, DEPTH FINDING.

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE