论文标题
山区内海浪中的对流
Convection under internal waves in a mountain lake
论文作者
论文摘要
尚未广泛观察到深层高山湖Garda（I）中的湍流混合过程。关于湍流驱动因素的知识对于湖中物质，营养物质和污染物，湖泊和天然水体的洞察力很重要。在本文中，与密度分层环境中更常见的剪切诱导的湍流相反，内波引起的湍流对流的发生。从一个专用的一年系泊系泊车中分析了观察结果，在344 m深湖中心的较深的一半中，在单个电流仪表下以1.5 m的间隔保持1.5 m的高分辨率温度传感器。从情节上讲，湖面上方下方50 m的弱密度分层水的频谱和相干证据表明，在内部波动的内波下，短期（15至30分钟）的对流运动得到了上面更强的地层水的支撑。几乎均匀的条件不是摩擦的Ekman动力学，而是大规模的内波峰。
Turbulent mixing processes in deep alpine Lake Garda (I) have not extensively been observed. Knowledge about drivers of turbulent fluxes are important for insights in the transport of matter, nutrients and pollutants, in the lake and in natural water bodies in general. In this paper, the occurrence of internal wave induced turbulent convection is addressed as opposed to the more common shear-induced turbulence in a density stratified environment. Observations are analyzed from a dedicated yearlong mooring holding 100 high-resolution temperature sensors at 1.5 m intervals under a single current meter in the deeper half of the 344 m deep lake-center. Episodically, the weakly density stratified waters in the lower 50 m above the lake floor show spectral slope and coherence evidence of short-term (15 to 30 minutes) convective motions under internal waves that are supported by the stronger stratified waters above. The near-homogeneous conditions are not attributable to frictional Ekman dynamics, but to large-scale internal wave crests.
