DOI: 10.1002/2017JC012960
Scopus记录号: 2-s2.0-85041123103
论文题名: Kilometric Scale Modeling of the North West European Shelf Seas: Exploring the Spatial and Temporal Variability of Internal Tides
作者: Guihou K. ; Polton J. ; Harle J. ; Wakelin S. ; O'Dea E. ; Holt J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 1 起始页码: 688
结束页码: 707
语种: 英语
英文关键词: high-resolution modeling
; internal tides
; North-Western European Shelf
; observations
Scopus关键词: annual variation
; barotropic tide
; internal tide
; modeling
; observational method
; open ocean
; pycnocline
; resolution
; sea surface temperature
; shelf break
; shelf sea
; spatiotemporal analysis
; spectral analysis
; temperature profile
; time series
; African Margin [Atlantic Ocean]
; Atlantic Ocean
; Europe
英文摘要: The North West European Shelf break acts as a barrier to the transport and exchange between the open ocean and the shelf seas. The strong spatial variability of these exchange processes is hard to fully explore using observations, and simulations generally are too coarse to simulate the fine-scale processes over the whole region. In this context, under the FASTNEt program, a new NEMO configuration of the North West European Shelf and Atlantic Margin at 1/60° (∼1.8 km) has been developed, with the objective to better understand and quantify the seasonal and interannual variability of shelf break processes. The capability of this configuration to reproduce the seasonal cycle in SST, the barotropic tide, and fine-resolution temperature profiles is assessed against a basin-scale (1/12°, ∼9 km) configuration and a standard regional configuration (7 km resolution). The seasonal cycle is well reproduced in all configurations though the fine-resolution allows the simulation of smaller scale processes. Time series of temperature at various locations on the shelf show the presence of internal waves with a strong spatiotemporal variability. Spectral analysis of the internal waves reveals peaks at the diurnal, semidiurnal, inertial, and quarter-diurnal bands, which are only realistically reproduced in the new configuration. Tidally induced pycnocline variability is diagnosed in the model and shown to vary with the spring neap cycle with mean displacement amplitudes in excess of 2 m for 30% of the stratified domain. With sufficiently fine resolution, internal tides are shown to be generated at numerous bathymetric features resulting in a complex pycnocline displacement superposition pattern. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114833
Appears in Collections: 气候减缓与适应
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作者单位: National Oceanography Centre, Liverpool, United Kingdom; Servicio de Hidrografía Naval, Buenos Aires, Argentina; Met Office, Exeter, Devon, United Kingdom
Recommended Citation:
Guihou K.,Polton J.,Harle J.,et al. Kilometric Scale Modeling of the North West European Shelf Seas: Exploring the Spatial and Temporal Variability of Internal Tides[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)