期刊
CONTINENTAL SHELF RESEARCH
卷 116, 期 -, 页码 42-53出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.csr.2016.01.015
关键词
Internal bores; Internal tide; Submarine canyon; Coastal upwelling; Subthermocline water; Tidal pumping
类别
资金
- DeepWater Desal, LLC
- Monterey Peninsula Water Management District
- Moss Landing Power Plant (Dynergy Moss Landing, LLC)
This study utilizes more than a year of observations made in shallow waters (similar to 30 m) at the head of the Monterey Submarine Canyon to assess variability in the physical environment and internal bore field. The interaction of the internal tide with the canyon rim results in a semidiurnal tidal period pumping of cold-water masses (subthermocline waters) onto the adjacent shelf (i.e., internal bores). These internal bores are shown to be significantly coherent with the local sea surface height with minimal spatial variability when comparing two sites near the canyon head region. During the summer months, and periods of strong regional wind-driven upwelling and shoaling of the offshore thermocline, the canyon rim sites display elevated semidiurnal temperature variance. This semidiurnal variability reaches its annual minimum during the winter months when the regional upwelling favorable winds subside and the offshore thermocline deepens. Additionally, the observed internal bores show a distinct asymmetry between the leading (gradual cooling with velocities directed onto the shelf) and trailing edges (sharp warming with velocities directed into the canyon). It appears that the semidiurnal internal tide at the canyon head is a first-order control on the delivery of subthermocline waters to the nearshore coastal environment at this location. (C) 2016 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据