Strong vertical mixing in the Urup Strait, Geophys
Strong vertical mixing in the Urup Strait, Geophys
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乌鲁普海峡强烈的垂直混合，Geophys
DOI：
10.1029/2011gl048507
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
and Y. N. Volkov
中科院分区：
文献类型：
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作者：
S. Itoh;I. Ya suda;M. Yagi;H. Kaneko;S. Osafune;T. Nakatsuka J. Nishioka;and Y. N. Volkov
2007年夏天，在千岛海峡进行了微观结构测量。在横跨乌鲁普海峡陡坎的太平洋一侧进行的为期一天的重复观测过程中，在向太平洋流动（下坎）和从向太平洋流动向鄂霍次克流动（上坎）过渡期间观察到了非常强的混合，湍流能量耗散率为10− 6至10− 5 W kg− 1，垂直扩散率为10− 1至5 × 10− 1 m2 s −1。在强混合期间，我们观察到厚度为300-600 m，位密度为26.6-26.7σθ的均匀层，在一种情况下占据了整个水柱。在这一层的高值的盐度表明注入的diapycnal流从上层和下层，可能有助于向南入侵的中层水进入副热带环流。
Microstructure measurements were conducted in one of the Kuril Straits in the summer of 2007. Over the course of 1 day of repeated observations across the Pacific side of the steep sill of the Urup Strait, extremely strong mixing was observed during periods of Pacific‐ward (down‐sill) flows and during the transition from Pacific‐ward to Okhotsk‐ward (up‐sill) flows, with a turbulent energy dissipation rate ɛ of 10−6to 10−5W kg−1and vertical diffusivity of 10−1to 5 × 10−1m2s−1. During the period of strong mixing, we observed homogeneous layers with a thickness of 300–600 m and potential density of 26.6–26.7σθ, occupying the entire water column in one case. High values of ɛ within this layer indicate the injection of diapycnal flows from the upper and lower layers, possibly contributing to southward intrusion of intermediate water into the subtropical gyre.