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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Impact of Near-Inertial Waves on Vertical Mixing and Air-Sea CO2 Fluxes in the Southern Ocean
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Impact of Near-Inertial Waves on Vertical Mixing and Air-Sea CO2 Fluxes in the Southern Ocean

机译：近乎惯性波对南海垂直混合和空中海洋二氧化碳助焊剂的影响

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摘要

We report the significant impact of near-inertial waves (NIWs) on vertical mixing and air-sea carbon dioxide (CO2) fluxes in the Southern Ocean using a biogeochemical model coupled to an eddy-rich ocean circulation model. The effects of high-frequency processes are quantified by comparing the fully coupled solution (ONLINE) to two offline simulations based on 5-day-averaged output of the ONLINE simulation: one that uses vertical mixing archived from the ONLINE model (CTRL) and another in which vertical mixing is recomputed from the 5-day average hydrodynamic fields (5dAVG). In this latter simulation, processes with temporal variabilities of a few days including NIWs are excluded in the biogeochemical simulation. Suppression of these processes reduces vertical shear and vertical mixing in the upper ocean, leading to decreased supply of carbon-rich water from below, less CO2 outgassing in austral winter, and more uptake in summer. The net change amounts up to one third of the seasonal variability in Southern Ocean CO2 flux. Our results clearly demonstrate the importance of resolving high-frequency processes such as NIWs to better estimate the carbon cycle in numerical model simulations.
机译：我们使用与富涡海洋循环模型相结合的生物地球化学模型报告近惯性波（NIWS）对南海垂直混合和空中海碳二氧化氧化物（CO2）通量的显着影响。通过将完全耦合的解决方案（Online）与在线模拟的5天平均输出（Ctrl）和另一个使用垂直混合归档的垂直混合，通过将完全耦合的解决方案（Online）与两个离线仿真进行比较来量化高频过程的影响其中垂直混合从5天的平均水动力场（5DAVG）重新计算。在后一种模拟中，在生物地理化仿真中排除了包括NIW的时间变量的过程。抑制这些过程减少了上海的垂直剪切和垂直混合，从而降低了低于下面的碳含量的水，澳大利亚冬季的二氧化碳排出量减少，夏季更多摄取。净变化最多可达南洋二氧化碳助焊剂季节变异的三分之一。我们的结果清楚地证明了解决高频过程，例如NIW，以更好地估计数值模拟模拟中的碳循环。

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