气候变化领域集成服务门户(CCPortal): The Tilt of Mean Dynamic Topography and its Seasonality Along the Coast of the Chinese Mainland

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DOI	10.1029/2020JC016778
	The Tilt of Mean Dynamic Topography and its Seasonality Along the Coast of the Chinese Mainland
	Lin W.; Lin H.; Hu J.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	Tilt of coastal mean dynamic topography (MDT) has recently been investigated in many regions, but few studies have examined the seasonality of the MDT along the coast of the Chinese mainland. The China seas are relatively unique as they experience prominent seasonal changes in monsoons and the China Coastal Currents, which are supposed to affect the coastal MDT significantly. This study investigates the Chinese coastal MDT tilt and its seasonality based on the geodetic and ocean approaches. The two independent approaches show a good agreement in their respective estimates. The Chinese coastal MDT presents an overall northward drop and undergoes an evident seasonality with steeper slopes in winter and flatter ones in summer. A dynamical analysis based on alongshore momentum equation suggests that the alongshore MDT along the coast of the Chinese mainland is a counter balance of contributions from the alongshore wind and the coastal current-induced bottom friction, with both of them having prominent seasonality. The overall northward drop is in fact induced primarily by the strong alongshore wind stress in winter and by coastal currents in summer, in particular for the segment between Xiamen and Zhapo. The wintertime coastal MDT is well predicted by the arrested topographic wave model, which however could not reproduce the summertime tilt. The summertime MDT is more likely affected by the open-ocean forcing (i.e., the latitudinal difference of the Kuroshio strength) and a return flow caused by flattening the coastal tilt piled up by the previous winter monsoon. © 2020. American Geophysical Union. All Rights Reserved.
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/186501
作者单位	State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Lin W.,Lin H.,Hu J.. The Tilt of Mean Dynamic Topography and its Seasonality Along the Coast of the Chinese Mainland[J],2021,126(2).
APA	Lin W.,Lin H.,&Hu J..(2021).The Tilt of Mean Dynamic Topography and its Seasonality Along the Coast of the Chinese Mainland.Journal of Geophysical Research: Oceans,126(2).
MLA	Lin W.,et al."The Tilt of Mean Dynamic Topography and its Seasonality Along the Coast of the Chinese Mainland".Journal of Geophysical Research: Oceans 126.2(2021).