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Analysis on the Spatial and Temporal Distribution Characteristics of Ocean Fronts in the Equatorial Pacific
Author(s): 
Pages: 62-67
Year: Issue:  1
Journal: Ocean Technology

Keyword:  WOA13temperaturesound velocityocean fronts;
Abstract: Based on the data of temperature and salinity of WOA13, the spatial and temporal distribution characteristics of temperature, salinity and sound velocity fronts in the equatorial sea area of the Pacific were analyzed through absolute gradient analysis. It was found that the fronts of the three elements exist in north and south positions. Temperature fronts: The northern equatorial temperature front exists throughout the year, and the frontal position is mainly distributed in 7° N, with depth of 30~200 m, and the frontal position gradually moves westward as the depth deepens. The frontal distribution in autumn is the most extensive and the front intensity is the highest, and the spring frontal distribution is the smallest with the front intensity being the lowest. Southern equatorial temperature front exists throughout the year, and the frontal position is mainly distributed at 5 ° S, with depth of 50~275 m. With the deepening of depth, the front gradually moves to the west, and the frontal span gets longer. The spring front is the strongest, while the autumn front strength is the weakest. Sound velocity fronts:The position of sound velocity fronts and temperature fronts is roughly the same, and the correlation coefficient between the two fronts intensity at the same point on the front axis is extremely close to 1, which shows that the impact of temperature on the sound velocity is great. In addition, the maximum sound velocity front intensity appears at a depth of 100 m.
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