气候变化领域集成服务门户(CCPortal): Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China

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DOI	10.1029/2019JC015863
	Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China
	Lin L.; Liu D.; Guo X.; Luo C.; Cheng Y.
发表日期	2020
ISSN	21699275
卷号	125 期号:5
英文摘要	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. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Adjiont method; Hydrodynamic modelling; Residence time; Shelf seas of China; Tides; Water exchange
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186892
作者单位	State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China; Center for Marine Environmental Study, Ehime University, Matsuyama, Japan; Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, China; School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan, China
推荐引用方式 GB/T 7714	Lin L.,Liu D.,Guo X.,et al. Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China[J],2020,125(5).
APA	Lin L.,Liu D.,Guo X.,Luo C.,&Cheng Y..(2020).Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China.Journal of Geophysical Research: Oceans,125(5).
MLA	Lin L.,et al."Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China".Journal of Geophysical Research: Oceans 125.5(2020).