Chen Xiaofeng, Shen Zhenyao, Li Yangyang, Yang Ye
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, PR China.
Mar Pollut Bull. 2015 Aug 15;97(1-2):349-364. doi: 10.1016/j.marpolbul.2015.05.067. Epub 2015 Jun 6.
A three-dimensional circulation model (the Environmental Fluid Dynamic Code) was used to examine the role that physical forcing (river discharge, wind speed and direction) plays in controlling hypoxia in waters adjacent to the Yangtze Estuary. The model assumes that the biological consumption of oxygen is constant in both time and space, which allows the role of physical forcing in modulating the oxygen dynamics to be isolated. Despite of the simplicity of this model, the simulation results showed that it can reproduce the observed variability of dissolved oxygen in waters adjacent to the Yangtze Estuary, thereby highlighting the important role of changes in physical forcing in the variation of hypoxia. The scenarios tested revealed appreciable changes in the areal extent of hypoxia as a function of wind speed and wind direction. Interestingly, well-developed hypoxia was insensitive to river discharge.
利用一个三维环流模型（环境流体动力学代码）来研究物理强迫（河流流量、风速和风向）在控制长江口附近水域缺氧情况中所起的作用。该模型假定氧气的生物消耗量在时间和空间上都是恒定的，这使得能够分离出物理强迫在调节氧气动态变化方面的作用。尽管该模型较为简单，但模拟结果表明它能够再现长江口附近水域观测到的溶解氧变化情况，从而突出了物理强迫变化在缺氧变化中的重要作用。所测试的情景显示，缺氧区域范围随风速和风向有明显变化。有趣的是，发育良好的缺氧情况对河流流量不敏感。
