AI 中文总结
研究地中海深层水平水流小尺度极化变化，通过复杂系泊系统观测，发现水流差异与极化有关，在不同条件下极化交替，符合非传统理论，且与局部分层减少有关。
AI 中文摘要
报告了深海观测结果，即水平水流差异在50米小尺度上典型幅度为0.02米/秒，使得相对涡度达到惯性频率f的值。时间序列观测是使用部署在2500米深的地中海的复杂系泊系统进行的，那里垂直密度分层极弱，浮力频率为O(f)，总速度<0.07米/秒的缓慢水流由惯性内波和亚中尺度涡旋主导。当极化（即椭圆振荡运动的遍历方向）改变符号时，水平水流差异增加。在近均匀条件下主要发现惯性运动的常见反气旋极化。在分层水条件下，它与不常见的气旋极化交替出现，在50米距离内变化。这种交替与非传统惯性重力波理论的预测一致，但仅在相对强烈的湍流对流导致局部分层减少时，如观测到的那样。
英文摘要
Deep-sea observations are reported of horizontal waterflow differences with typical amplitudes of 0.02 m s-1 over 50-m small scales so that relative vorticity reaches values of the inertial frequency f. The timeseries observations are made using a complex mooring system deployed in the 2500-m deep Mediterranean Sea, where vertical density stratification is extremely weak, with buoyancy frequency O(f), and the slow waterflow with total speeds <0.07 m s-1 is dominated by inertial internal waves and sub-mesoscale eddies. Horizontal waterflow differences increase when polarization, i.e. direction of traversal of elliptic oscillatory motion, switches sign. Common anticyclonic polarization of inertial motions is predominantly found under near-homogeneous conditions. It alternates with uncommon cyclonic polarization under stratified-water conditions, varyingly over 50-m distances. The alternation is in line with predictions from non-traditional inertio-gravity wave theory, but only when relatively strong turbulent convection causes local reduced stratification, as observed.
Comments21 pages, 5 figures
