Field observations of coastal regions are important for studying physical and biological features. Observations of high-resolution coastal phenomena were obtained by using a tow-yo instrument and a turbulence profiler at Daya Bay in the South China Sea in October 2015. Details of coastal phenomena, including warm water from a nuclear plant discharge, as well as an upwelling, and front, were obtained. The upwelling, with a width of 2 km, resulted in saltier and more turbid water near the bottom, with low chlorophyll-a and dissolved oxygen contents being transported upward to the surface layer and changing the local water environment. The front, with the lateral salinity variations as large as 0.7 psu across 1 km, was active at the water intersection of the South China Sea and Daya Bay. Such events commonly form during weak stratification periods in autumn. Continuous measurements from VMP-250 profiler over circa 22 h revealed active fronts and an averaged dissipation rate of 8 × 10?8 W/kg and diffusivity of 5.8 × 10?5 m2/s (i.e., one order of magnitude larger than in the open ocean) in the thermocline. The front was accompanied by strong mixing, indicating that it had formed at the intersection of different water masses and played an important role in energy dissipation in Daya Bay, further affecting the distribution of ecological elements.

中文题目：南海大亚湾上升流和锋面的高分辨率观测

中文摘要：沿海地区的野外观测对于研究物理和生物特征非常重要。2015年10月，通过使用拖曳装置和湍流剖面仪在南海大亚湾获得了近岸高分辨率的观测结果。获得了近岸状况的详细信息，包括核电站排放的温水、上升流和锋面。宽度为2km的上升流导致底部附近的水盐度更高、更浑浊，叶绿素a和溶解氧含量较低，向上输送到表层，并改变了当地的水环境。锋面在南海和大亚湾的水域交汇处产生，在1公里范围内的盐度变化高达0.7 psu，通常在秋季的弱分层期形成。VMP-250剖面仪在约22小时内的连续测量揭示了活跃区域的平均耗散率为8×10?8 W/kg，扩散率为5.8×10?5 m2/s（比开阔海域大一个数量级）。锋面伴随着强烈的混合，表明它形成于不同水团的交汇处，并在大亚湾的能量耗散中发挥了重要作用，进一步影响了生态元素的分布。