The Zapiola Anticyclone (ZA) is a strong, $\mathcal{O}$(100 Sv), barotropic vortex in the center of the Argentine Basin that is tied to a bathymetric feature called the Zapiola Rise. It is regionally significant for two reasons: first, the strong vortex is a dynamical barrier that inhibits the lateral exchange of water, and hence has the ability to trap water for a long period of time. Second, its dynamics is governed by a balance between eddy-driven mass convergence and divergent Ekman transport, which gives rise to strong downwelling and Ekman pumping into the bottom boundary layer.

This study investigates the kinematics of the ZA by studying the fate of the water parcels that are trapped by the ZA. We use output from a five-year simulation with an eddy-permitting ocean model, and we use a Lagrangian approach to track water parcels originating from within the ZA. We determine basic statistics of the parcel trajectories, including retention time, number of revolutions, vertical displacement, and temperature and salinity changes. The picture that emerges is one of water parcels spiraling downward through the water column, undergoing downwelling while they revolve anticyclonically around the center of the ZA. In our experiment, water parcels spend on average 451 days within the ZA, and make 2.6 revolutions around its center, with each revolution taking somewhere between 100 and 200 days. On average, parcels undergo a 94 m descent, 0.03 °C cooling and 0.0042 psu freshening. But individual parcels can undergo more than 800 m of downwelling, 0.2 °C of cooling, and $\pm$ 0.02 psu of salinity change. We believe that vertical motions of this order of magnitude, and the associated water mass transformations, are unique in the abyssal mid-latitude oceans.

Zapiola Anticyclone（ZA）是强壮的， $\mathcal{Ø}$（100 Sv），位于阿根廷盆地中心的正压涡旋，与称为Zapiola Rise的测深特征相关。它在区域内具有重要意义，原因有二：首先，强涡旋是一种动态屏障，可抑制水的横向交换，因此具有长时间捕获水的能力。其次，其动力学受涡流驱动的质量汇聚和发散的埃克曼输运之间的平衡控制，这引起了强烈的下降流和埃克曼泵入底部边界层。

这项研究通过研究ZA所困水域的命运来研究ZA的运动学。我们使用五年模拟的结果和允许涡流的海洋模型，并使用拉格朗日方法来跟踪来自ZA内部的水域。我们确定包裹轨迹的基本统计信息，包括保留时间，转数，垂直位移以及温度和盐度变化。出现的图像是水包裹中向下旋转穿过水柱的水之一，当水包裹围绕ZA中心反圈旋转时，它正在下降。在我们的实验中，水包在ZA中平均花费451天，并围绕其中心旋转2.6圈，每次旋转大约需要100到200天。一般，包裹下降94 m，冷却0.03°C，新鲜度为0.0042 psu。但是单个包裹可能会经受800 m以上的下沉，0.2°C的冷却和$\pm$盐度变化0.02 psu。我们相信，在深海中纬度海洋中，这种数量级的垂直运动以及相关的水质转换是独特的。