论文标题
深中海底附近的水温对流和间歇性噪声
Convection and intermittency noise in water temperature near a deep Mediterranean seafloor
论文作者
论文摘要
湍流和内部波动运动对于在深海中的动量，热量和悬浮物的交换非常重要，这通常在密度上稳定分层。湍流产生模型涉及垂直电流差的剪切，这些垂直电流差异使分层水变形，并通过（不稳定）浮力驱动对流。在良好的分层海洋中，发现剪切生成更为笼统，而对流则发生在海面附近，例如通过夜间冷却。西方中亚海的远低于地面，分层非常弱，并提供了观察到深海对流的机会。一组机会主义的高分辨率温度传感器不仅展示了经典的内波引起的湍流，而且还归因于与各种混沌理论模型相关的地热供暖和光谱特性，这些模型（例如1/Sigma粉红色噪声），例如Sigma噪声（Sigma表示频率），主要是在100个噪声上，涉及（0.01 M噪声），围绕（0.01 m）of Seelfornian of Seafly of Seafly of Seefly of Seafly of Seefly和1/1/sigmam^2 2/sigma^2 2/sigma^2 2/sigma^22 M在海底上方。观察到近乎惯性的温度变化发生在海底，从而扰乱了局部对流湍流状态，以暂时剪切剪切主导。在海底的积分湍流时间尺度通常比上方约100 m小（具有较高的频率运动）。
Turbulent and internal wave motions are important for the exchange of momentum, heat and suspended matter in the deep-sea which is generally stably stratified in density. Turbulence-generation models involve shear of vertical current differences that deforms the stratified waters, and convection that is drive by (unstable) buoyancy. Shear-generation is found more general in the well-stratified ocean-interior, while convection is known to occur near the sea-surface, e.g. via nighttime cooling. Far below the surface, the Western-Mediterranean Sea is very weakly stratified and offers opportunity to observationally study deep-sea convection. An opportunistic small set of high-resolution temperature sensors demonstrates not only classic internal-wave-induced turbulence, but also convection attributed to geothermal heating and spectral properties that relate to various chaos-theory models such as 1/sigma pink noise (sigma denoting frequency), mainly found lying at (0.01 m above) the seafloor, and 1/sigma^2 Brownian noise, mainly found on a moored line at about 100 m above the seafloor. Near-inertial temperature variations are observed to occur down to the seafloor thereby disturbing the local convective turbulence regime to shear-dominated one temporarily. The integral turbulence time-scale is generally smaller (with dominant higher frequency motions) at the seafloor than about 100 m above it.
