太平洋赤道海区海洋锋时空分布特征分析  

Analysis on the Spatial and Temporal Distribution Characteristics of Ocean Fronts in the Equatorial Pacific

作　　者：刘鹏[1] 张永刚[1] 刘建斌 LIU Peng1, ZHANG Yong-Gang1, LIU Jian-Bin2(1. Dalian Naval Academy, Dalian 116018, Liaoning Province, China; 2. Meteorological Observatory of the Jiaozhou Station, Naval Air Force, Qingdao 266300, Shandong Province, Chin)

机构地区：[1]海军大连舰艇学院,辽宁大连116018 [2]青岛胶州航空兵气象场站,山东青岛266300

出　　处：《海洋技术学报》2018年第1期62-67,共6页Journal of Ocean Technology

摘　　要：基于WOA13的温盐数据资料,利用绝对梯度分析法,对太平洋赤道海区的温度、声速锋面的时空分布特征进行了分析,结果表明,3种要素的锋面均存在于一南一北两个位置。温度锋面:北赤道温度锋面全年均存在,锋面位置主要分布在7°N、水深30~200 m处,锋面随深度加深逐渐向西移动,秋季锋面分布范围最广且锋强度最大,春季锋面分布范围最小且锋强度最小。南赤道温度锋面全年存在,锋面位置主要分布在5°S、水深50~275 m处。随深度加深,锋面也逐渐向西移动且东西跨度变长。春季锋的强度最大,秋季的锋强度最弱。声速锋面:声速锋与温度锋的位置大致相同,且两者在锋轴线上同一点处的锋强度的相关系数接近于1,可见温度对声速的影响很大。此外,最大声速锋强出现在水深100 m处。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.

关 键 词：WOA13 温度 声速 海洋锋 

分 类 号：P733[天文地球—物理海洋学]