Internal seiche pumping between sill-separated basins
Internal seiche pumping between sill-separated basins
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隔离池之间的内部抽水
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
D. Imboden
中科院分区：
文献类型：
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作者：
D. C. Senden;D. Imboden
尽管卢塞恩湖东部的两个盆地Gersauersee和Urnersee非常接近，且面积相似（深200米×长10公里×宽2公里），但它们的内部行为却有很大的差异，特别是在冬末和春季。两个湖泊被一个小型中间盆地（深120 m ×长4 km ×宽1 km）隔开，两端的底床深度约为90 m。我们报告的结果进行了实地计划在1988年2月至5月期间，当观察获得每周CTD断面和三个热敏电阻串/电流计停泊部署了两个月，一个靠近每个窗台和第三个在南端的Urnersee附近的Fluelen。在观测期内，格萨尔湖的层化，即表层与底层的相对密度差Δρ/ρ，为12 × 10−6，乌尔讷湖为4 × 10−6。在风事件之后，Gersauersee的大幅度内部假潮（垂直偏移为1050米，周期为1060小时）有效地抽水。
Abstract Despite their close proximity and similar dimensions (∼ 200m deep × 10km long × 2km wide) the two eastern basins of Lake Lucerne, Gersauersee and Urnersee, exhibit considerable differences in their internal behaviour, particularly during late winter and spring. The two lakes are separated by a small intermediate basin (∼ 120m deep × 4km long × 1km wide) with sills of approximately 90m depth at each end. We report results of a field program conducted over the period February—May, 1988, when observations were obtained from weekly CTD transects and from three thermistor string/current meter moorings deployed for two months, one near each sill and the third at the southern end of Urnersee near Fluelen. During the observation period the stratification, relative surface to bottom density difference, Δρ/ρ, was 12 × 10−6 in Gersauersee and 4 × 10−6 in Urnersee. Following wind events a large amplitude internal seiche in Gersauersee (vertical excursions of ∼50m and period ∼60 hours) effectively pumpe...