俄勒冈海岸日涨潮加剧

IF 2.8 2区地球科学 Q1 OCEANOGRAPHY

Journal of Physical Oceanography Pub Date : 2014-07-08 DOI:10.1175/JPO-D-13-0247.1

J. Osborne, A. Kurapov, G. Egbert, P. Kosro

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引用次数: 11

摘要

摘要基于高频(HF)雷达表面流数据和1公里分辨率海洋环流模式输出的分析，发现俄勒冈大陆架(美国西海岸)部分地区的日潮汐加剧。K1潮汐流的震级接近0.07 m s - 1，分布在陆架较宽的部分(Heceta Bank complex);先前由Erofeeva等人预测的44°-44.5°N)在这里得到了新获得的高频雷达数据的证实。在赫塔岸以南的狭窄大陆架上也发现了强烈的日潮。在布兰科角附近(42.8°N)，日潮流(K1和O1成分加起来)可达0.3 m s−1。日潮汐强度的显著差异取决于模式是受潮汐和风(TW)的影响还是仅受潮汐的影响。此外，发现风强迫的日变率影响日地面速度。对于仅受潮汐强迫的情况，结果在很大程度上取决于模式海洋是否分层[仅潮汐，分层(TOS)]。

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Intensified Diurnal Tides along the Oregon Coast

AbstractIntensified diurnal tides are found along portions of the Oregon shelf (U.S. West Coast) based on analyses of high-frequency (HF) radar surface current data and outputs of a 1-km resolution ocean circulation model. The K1 tidal currents with magnitudes near 0.07 m s−1 over a wider part of the shelf (Heceta Bank complex; 44°–44.5°N), previously predicted by Erofeeva et al., are confirmed here by newly available HF radar data. Intensified diurnal tides are also found along the narrow shelf south of Heceta Bank. In the close vicinity of Cape Blanco (42.8°N), diurnal tidal currents (K1 and O1 constituents combined) may reach 0.3 m s−1. Appreciable differences in diurnal tide intensity are found depending on whether the model is forced with tides and winds (TW) or only tides. Also, diurnal variability in wind forcing is found to affect diurnal surface velocities. For the case forced by tides alone, results strongly depend on whether the model ocean is stratified [tides only, stratified (TOS)] or not [t...

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来源期刊

Journal of Physical Oceanography 地学-海洋学

CiteScore

2.40

自引率

20.00%

发文量

200

审稿时长

4.5 months

期刊介绍： The Journal of Physical Oceanography (JPO) (ISSN: 0022-3670; eISSN: 1520-0485) publishes research related to the physics of the ocean and to processes operating at its boundaries. Observational, theoretical, and modeling studies are all welcome, especially those that focus on elucidating specific physical processes. Papers that investigate interactions with other components of the Earth system (e.g., ocean–atmosphere, physical–biological, and physical–chemical interactions) as well as studies of other fluid systems (e.g., lakes and laboratory tanks) are also invited, as long as their focus is on understanding the ocean or its role in the Earth system.