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学科主题: Oceanography
题名: Observations and numerical modeling of the Pearl River plume in summer season
作者: Pan, JY ; Gu, YZ ; Wang, DX
通讯作者: panj@cuhk.edu.hk
关键词: Pearl River plume ; cruise observations ; ROMS modeling ; near ; far-field ; wind forcing ; tides
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
发表日期: 2014
卷: 119, 期:4, 页:2480-2500
收录类别: sci
部门归属: [Pan, Jiayi ; Gu, Yanzhen] Chinese Univ Hong Kong, Inst Space & Earth Informat Sci, Shatin, Hong Kong, Peoples R China ; [Wang, Dongxiao] South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China
项目归属: LTO
资助者: General Research Fund of Hong Kong Research Grants Council (RGC) [CUHK 402912, 403113]; Hong Kong Innovation and Technology Fund [ITS/272/11, ITS/259/12]; Chinese University of Hong Kong
摘要: A cruise survey of the Pearl River plume during southeasterly and southwesterly winds, two typical wind patterns in summer in Guangdong coastal waters, is reported and the cruise data are analyzed to unveil the plume dynamics. The Kelvin number is derived from the in situ data, revealing that the Pearl River plume exhibits two different scales in response to the two kinds of the wind forcing. Numerical model simulations based on the regional oceanic modeling system (ROMS) with nesting domains are implemented to explore details of the plume dynamics, validated by cruise observations and tidal gauge sea level data. Modeling results suggest that there is a subtidal, anticyclonic recirculation bulge on the west side out of the estuary mouth under southeasterly winds, showing a recirculating plume in the near-field. When the wind changes to the southwesterly, however, the recirculating plume vanishes. The distinct, supercritical tidal plume front occurs with southeasterly winds prevailing in spring tide due to the strong advection in the tidal plume. The tidal salt deficit flux can reach as high as 12.5% of the mean current flux, and illustrates the combined forcing of tide and wind. Key Points The paper clarifies the Pearl River plume anatomy under two typical winds Spring tide facilitates the supercritical Pearl River tidal plume front Tide determines tidal salt deficit flux strength; wind determines the direction
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10559
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Recommended Citation:
Pan, JY; Gu, YZ; Wang, DX.Observations and numerical modeling of the Pearl River plume in summer season,JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2014,119(4):2480-2500
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