کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4538290 | 1626515 | 2006 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the inner-shelf circulation in the northern Gulf of Cádiz, southern Portuguese shelf
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
A new look at the inner-shelf circulation in the northern Gulf of Cádiz (SW Iberian Peninsula) is taken. Results reveal the introduction of a sharp spatial heterogeneity in the wind field by the coastal geometry around Cape St. Vincent and nearby mountain chains. Direct observations taken in November-December 2001 reveal the alternating nature of the coastal flow along the SW Iberian Peninsula, featuring a sharp current inversion on time scales of less than 2 days. Along-shore gradients of the oceanic wind stress were detected, which may contribute to the coastal circulation patterns in the region. Over the observational period, the sea-level variability in the Gulf of Cádiz is better explained by the action of along-shore winds outside the Gulf, than by local winds. This is confirmed by a scale analysis done on the vertically integrated momentum equation. It is shown that, to a first approximation, the expected behaviour of the inner-shelf flow responds to linear dynamics. In this approximation, the along-shore sea-level slope (â¼5cm over 100Â km) is the dominant term, overriding the linear (bottom and surface) stress terms. This suggests control by large-scale atmospheric pressure systems, and negligible dynamical influence from local wind stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 53, Issues 11â13, June 2006, Pages 1198-1218
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 53, Issues 11â13, June 2006, Pages 1198-1218
نویسندگان
R.F. Sánchez, E. Mason, P. Relvas, A.J. da Silva, Á. Peliz,