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利用Argo剖面浮标的轨迹资料研究了棉兰老岛以东中层(1000～2000m?)深度上的中尺度环流特征.浮标漂移深度的轨迹表明,棉兰老岛以东的中层环流包含非常显著的中尺度信号特征.浮标的漂移流速表明了该区域的气旋式涡旋和反气旋式涡旋在1000m深度上的平均切向速度约为20cm·s-1,随着深度增加速度有所降低,在2000m深度上流速约为10cm·s-1.以上结果暗示在棉兰老岛以东区域,依据零速度参考面的动力计算可能存在着较大误差.涡旋的平均涡度和赤道β平面罗斯贝数表明,这些中尺度涡旋对于棉兰老岛以东中层环流的质量和涡度平衡起着重要的作用.
The characteristics of mesoscale circulation over the depth of 1000 ~ 2000m? In the east of Mindanao Island were studied by using the Argo profile buoy trajectory.The trajectory of the depth of buoy drift indicates that the middle circulation east of Mindanao contains very significant characteristics of mesoscale signal, Indicates that the average tangential velocity of the cyclonic vortex and the anticyclone vortex at the depth of 1000 m is about 20 cm · s -1 in this region. As the depth increases, the velocity decreases about Is 10cm · s-1.The above results suggest that there may be a large error in dynamic calculation based on zero-speed reference surface in the area east of Mindanao.The mean vorticity of vortex and the Rossby number of equatorial β-plane indicate that these mesoscale eddies The spin plays an important role in the mass and vorticity balance of the mid-level circulation to the east of Mindanao.