基于WOA13数据的赤道大西洋海区温度锋的时空分布特征分析

Temporal and spatial distribution characteristics of temperature front in the equatorial Atlantic based on WOA13 data

基于WOA13多年的气候态数据,研究了赤道大西洋海区南北两个温度锋面及其锋强的时空分布特征:北部锋主要存在于夏秋两季,夏季锋强度最大,锋面分布在0~200 m水深;南部锋全年都有存在,春季锋强最大,锋面分布于0~250 m水深。对比两个锋面处的声速剖面,能明显看出在北部锋存在海域,锋强大的夏秋两季与锋强小的冬春两季对声速剖面影响不同,而南部锋在锋面存在深度,声速在各季随深度的变化较一致。

Based on the WOA13 data, the temporal and spatial distribution characteristics of two temperature fronts and front intensity in the equatorial Atlantic are analyzed. The results show that, the northern front mainly exists in summer and autumn, with a maximum strength in summer, and the northern front mainly distributes in the depth of 0~200 m. The southern front exists throughout the year with a maximum intensity in spring, and front mainly distributes in the depth of 0~250 m. Compared the sound velocity profile of the two front, the result show that the effect of the northern front in summer and autumn on the sound velocity profile is different from the effect of the northern front in spring and winter, and at the depth of the southern front, sound velocity profile changes with the depth is almost same in every season.