气候变化领域集成服务门户(CCPortal): Channel-Trapped Convergence and Divergence of Lateral Velocity in the Pearl River Estuary: Influence of Along-Estuary Variations of Channel Depth and Width

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DOI	10.1029/2019JC015369
	Channel-Trapped Convergence and Divergence of Lateral Velocity in the Pearl River Estuary: Influence of Along-Estuary Variations of Channel Depth and Width
	Pan J.; Lai W.; Devlin A.T.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	A cruise survey was conducted in the Pearl River Estuary (PRE) in May 2014. In situ observations during this cruise reveal that at the surface in the central channel of the PRE there was a strong convergence of lateral velocity during an ebb tide and a divergence during a flood tide. The ebb tide convergence was also observed in satellite synthetic aperture radar imagery. The Finite-Volume Coastal Ocean Model was executed in the PRE domain to accurately simulate the convergence and divergence of the cross-estuary velocity during ebb and flood tides, respectively. Numerical experiments in an idealized estuary domain are implemented with three distinct forcing scenarios: tide, river discharge, and a combination of both. Model results show that the cross-estuary momentum balance plays a significant role in the dynamics of the velocity convergence and divergence in the PRE. Additionally, the interaction between tide and river discharge enhances the surface convergence on ebb tide and generates the surface divergence on flood tide. The model results reveal that the along-estuary variation of channel depth and width is responsible for the tide-induced lateral velocity convergence and divergence in the channel, supported by the fact that when the channel depth and width are set to constant values in the model, the channel-trapped ebb convergence substantially weakens, and the flood divergence disappears. This study provides an indication for other wide estuaries. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	: Pearl River Estuary; convergence; cross-estuary velocity; divergence
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/187012
作者单位	School of Geography and Environment, Jiangxi Normal University, Nanchang, China; Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong
推荐引用方式 GB/T 7714	Pan J.,Lai W.,Devlin A.T.. Channel-Trapped Convergence and Divergence of Lateral Velocity in the Pearl River Estuary: Influence of Along-Estuary Variations of Channel Depth and Width[J],2020,125(1).
APA	Pan J.,Lai W.,&Devlin A.T..(2020).Channel-Trapped Convergence and Divergence of Lateral Velocity in the Pearl River Estuary: Influence of Along-Estuary Variations of Channel Depth and Width.Journal of Geophysical Research: Oceans,125(1).
MLA	Pan J.,et al."Channel-Trapped Convergence and Divergence of Lateral Velocity in the Pearl River Estuary: Influence of Along-Estuary Variations of Channel Depth and Width".Journal of Geophysical Research: Oceans 125.1(2020).