Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China
Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China
复制标题
潮汐对中国东部陆架海出水率的影响
DOI：
10.1029/2019jc015863
复制
发表时间：
2020-05
影响因子：
3.6
通讯作者：
Cheng Yao
中科院分区：
文献类型：
--
作者：
Lin Lei;Liu Dongyan;Guo Xinyu;Luo Chongxin;Cheng Yao
陆架海水输出速率是影响全球碳循环的关键因素。潮汐对大陆架流体动力学有重要影响，但在许多气候模式中被排除在外。为了评估潮汐对陆架水输出率的影响，本研究采用了区域水动力学模型和水停留时间（WRT）伴随模型，并研究了中国东部陆架海有和没有潮汐的模型运行。结果表明，渤海、黄海和东海的平均WRT分别为11.60、4.95和0.39年。当不考虑潮汐时，渤海和黄海的WRT减少了70%以上，东海减少了10%左右，这表明由于潮汐的缺乏，陆架水输出显着加速。潮汐效应具有与水深相关的空间变异性。敏感性实验表明，平均WRT的潮汐效应强于其他动力因素（风，河流和边界流）的影响。在有潮汐的模型中，与无潮汐的模型相比，潮汐通过加强底部阻力来削弱风力驱动的沿岸流，从而减缓了陆架内部和中部的水输出。在无潮模式中引入潮底摩擦参数可以显著改善WRT结果。这项研究强调了潮汐对陆架海长期运输的关键作用，以及在气候模型中参数化潮汐摩擦效应的重要性。
Water export rate of shelf seas is a pivotal factor impacting the global carbon cycle. Tides have important impacts on shelf hydrodynamics but are excluded in many climate models. To assess the effect of tides on export rates of shelf water, this study used a regional hydrodynamic model and a water residence time (WRT) adjoint model and examined model runs with and without tides for the eastern shelf seas of China. The results show that the average WRTs in the Bohai, Yellow, and East China seas were 11.60, 4.95, and 0.39 years, respectively. When tides were excluded, the WRTs decreased by >70% in the Bohai and Yellow seas and by ~10% in the East China Sea, indicating a significant acceleration in the shelf water export due to the absence of tides. The tidal effect has spatial variability associated with the water depth. Sensitivity experiments suggest that the tidal effect on the mean WRT was stronger than the effect of other dynamical factors (winds, rivers, and boundary currents). In the model with tides, tides weakened the wind‐driven coastal current by intensifying the bottom resistance and thus slowed water export in the inner and middle portions of the shelf, compared to the model without tides. Parameterization of the tidal bottom friction in the model without tides could significantly improve the WRT result. This study highlights the crucial role of tides on the long‐term transport of shelf seas and the significance of parameterizing the effect of tidal friction in climate models.
登录
查看更多内容
潮汐混合维持了充满活力的大陆架上的底部捕获的河流羽流和浮力海岸流
影响因子：
3.6
作者：
Wu Tianning;Wu Hui
通讯作者：
Wu Hui
影响因子：
--
作者：
Jian Ma;F. Qiao;Changshui Xia;Chang S. Kim
通讯作者：
Jian Ma;F. Qiao;Changshui Xia;Chang S. Kim
影响因子：
5.2
作者：
J. Holt;S. Wakelin;J. Huthnance
通讯作者：
J. Holt;S. Wakelin;J. Huthnance
DOI：
10.1016/j.csr.2013.09.026
发表时间：
2013-12
期刊：
--
影响因子：
--
作者：
É. Delhez
通讯作者：
É. Delhez
影响因子：
2.3
作者：
S. Tsunogai;S. Watanabe;J. Nakamura;T. Ono;Tetsuro Sato
通讯作者：
S. Tsunogai;S. Watanabe;J. Nakamura;T. Ono;Tetsuro Sato