The Antarctic Circumpolar Current (ACC) develops to area of convergences and divergences of the Southern Ocean, which is confined of Subantarctic Front (SAF) and Polar Front (PF). Position of the SAF and PF were constructed from Multi-Cannel Sea Surface Temperature (MCSST) gradients based on satellite AVHRR data. According to the SAF and PF average annual position the ACC northern and southern borders was determined as 60 and 100 cm isolines in Rio and Hernandez (2003) combined mean dynamic topography (MDT), which calculated by by in situ, drifter and satellite altimetric measurements relative to 1500 dbar. The ACC axis was defined as location of geostrophic surface speed maximum along meridian between stated isolines on the synoptic dynamic topography (SDT), which are constructed by superposition of sea level anomaly altimetry (SLA) data with corresponding MDT. Value of surface speed on the ACC axis was determined as intensity of this current. Along ACC axis seven local maximum of geostrophic surface speeds (more 20 cm/s) are observed. The ACC axis position changes near latitude 50oS in the Atlantic and the Indian Oceans, and between latitude 55–60oS in the Pacific Ocean. Thus average geostrophic surface speed along the ACC axis makes 16 cm/s, and it changes from 10 to 15 cm/s on ACC borders (SAF and PF). In spectral density sesonal variation of the ACC axis and intensity are looking good independently of longitude. However interannual changes are various for different past of the Sourtern Ocean. For example they are insignificant in Darke Passeg, but near Kergelen Platoau position of the ACC axis dislocates to south with rate about 0.02 deg/yr or 1.8 km/yr, while the ACC intensity isn't change almost.
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机译：南极极地洋流（ACC）发展到南洋的辐合和发散区域，该区域受亚南极锋（SAF）和极地锋（PF）的限制。 SAF和PF的位置是根据卫星AVHRR数据从多管道海面温度（MCSST）梯度构建的。根据SAF和PF的年平均位置，在里约热内卢和埃尔南德斯（2003）结合平均动态地形（MDT）确定ACC北部和南部边界为60和100 cm等值线，该地形由原位，漂移和卫星测高法计算相对于1500 dbar。 ACC轴定义为天气动态地形（SDT）上所述等值线之间沿子午线的地转表面速度最大值位置，该位置由海平面异常测高（SLA）数据与相应的MDT叠加而成。将ACC轴上的表面速度值确定为该电流的强度。沿ACC轴观察到地转表面速度的七个局部最大值（大于20 cm / s）。 ACC轴的位置在大西洋和印度洋的50oS附近以及在太平洋的55-60oS之间变化。因此，沿ACC轴的平均地转表面速度为16 cm / s，在ACC边界（SAF和PF）上从10到15 cm / s变化。在频谱密度中，ACC轴和强度的声变变化看起来都不错，而与经度无关。然而，每年的变化对于南洋的不同过去都是不同的。例如，它们在Darke Passeg中微不足道，但在ACC轴的Kergelen Platoau附近，以约0.02度/年或1.8公里/年的速度向南偏移，而ACC强度几乎没有变化。
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