Heat Transport through Diurnal Warm Layers
Heat Transport through Diurnal Warm Layers
复制标题
通过昼夜暖层的热传输
DOI：
10.1175/jpo-d-20-0079.1
复制
发表时间：
2020
影响因子：
3.5
通讯作者：
E. Shroyer
中科院分区：
文献类型：
--
作者：
K. Hughes;J. Moum;E. Shroyer
太阳辐射在海洋上层几米的穿透形成了一个近表面的、分层的日暖层。风应力加速了这一层的日喷流。在日向急流切变集中的日向温跃层处产生的湍流通过混合将热量向下重新分配。地面跟踪平台上的快速热敏电阻对温度和湍流的新测量结果从时间和深度上描述了这一序列的细节。在时间上，固定深度的序列在logϵ-logN参数空间中沿逆时针方向运动。这条路径还捕获了浮力雷诺数（湍流各向异性的代表）和奥兹米多夫尺度（在没有自由表面的情况下湍流的外垂直长度尺度的代表）的演变。在垂直方向上，太阳热通量总是导致上层几米的流体包加热，而湍流热流密度散度在最大垂直温度梯度深度上呈显著变化，上部为冷却流体包，下部为加热流体包。总的来说，我们测量的0.1°C h - 1数量级的流体包加热或冷却速率与我们对热通量散度的估计是一致的。在弱风中（<2 m s−1），海表温度（SST）由太阳辐射的深度依赖吸收控制。在强风中，湍流混合控制海温。
Penetration of solar radiation in the upper few meters of the ocean creates a near-surface, stratified diurnal warm layer. Wind stress accelerates a diurnal jet in this layer. Turbulence generated at the diurnal thermocline, where the shear of the diurnal jet is concentrated, redistributes heat downward via mixing. New measurements of temperature and turbulence from fast thermistors on a surface-following platform depict the details of this sequence in both time and depth. Temporally, the sequence at a fixed depth follows a counterclockwise path in logϵ–logN parameter space. This path also captures the evolution of buoyancy Reynolds number (a proxy for the anisotropy of the turbulence) and Ozmidov scale (a proxy for the outer vertical length scale of turbulence in the absence of the free surface). Vertically, the solar heat flux always leads to heating of fluid parcels in the upper few meters, whereas the turbulent heat flux divergence changes sign across the depth of maximum vertical temperature gradient, cooling fluid parcels above and heating fluid parcels below. In general, our measurements of fluid parcel heating or cooling rates of order 0.1°C h−1 are consistent with our estimates of heat flux divergence. In weak winds (<2 m s−1), sea surface temperature (SST) is controlled by the depth-dependent absorption of solar radiation. In stronger winds, turbulent mixing controls SST.
EGEE-3 活动期间 PIRATA 浮标赤道大西洋昼夜周期的一维建模研究
影响因子：
2.3
作者：
G. Caniaux;Y. DuPenhoat;M. Dengler;H. Giordani;R. Hummels
通讯作者：
R. Hummels
上层海洋的湍流和热结构：湍流解析模拟
DOI：
10.1007/s10494-019-00065-5
发表时间：
2019
期刊：
Turbulence and Combustion
影响因子：
--
作者：
Sarkar, Sutanu;Pham, Hieu T.
通讯作者：
Pham, Hieu T.