Accession Number : AD0671816

Title :   THE EFFECT OF A COLD-AIR OUTBREAK ON THE CONTINENTAL SHELF WATER OF THE NORTHWESTERN GULF OF MEXICO.

Descriptive Note : Technical rept.,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF OCEANOGRAPHY

Personal Author(s) : Parker,Charles A.

Report Date : MAY 1968

Pagination or Media Count : 104

Abstract : Two physical oceanographic cruises with almost identical coverage were conducted over the Texas-Louisiana shelf in January 1966. During the fifteen-day period between cruises, a sustained cold-air outbreak occurred over the survey region. 'Quasi-synoptic' measurements of temperature, salinity and sigma-t document a surface layer which is homogeneous to approximately 100 m (or to the bottom for shallower depths) during both cruise periods. The horizontal gradients in this layer are largest in the 'nearshore' region (less than 25 m depth) where isovalues contours generally parallel shore. The maximum temperature gradients increased from .25 degrees C/naut mi before the outbreak to .80 degrees C/naut mi after. There is indication that the subsurface salinity maximum of the Gulf of Mexico intersects the homogeneous surface layer over the slope region. The distribution of sigma-t along a horizontal line normal to shore for the surface layer over the shelf resembles the vertical distribution of sigma-t with waters further offshore. (Author)

Descriptors :   (*OCEANOGRAPHY, MEXICO GULF), SEA WATER, ATMOSPHERES, PREDICTIONS, TEMPERATURE, SALINITY, BAROMETRIC PRESSURE, SURFACES, CONTINENTAL SHELVES, DEEP WATER, HEAT FLUX, DISTRIBUTION, HEAT TRANSFER, TRANSFORMATIONS, DATA PROCESSING

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE