کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6383344 | 1626314 | 2016 | 65 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physical and dynamical characteristics of a 300Â m-deep anticyclonic eddy in the Ligurian Sea (Northwest Mediterranean Sea): Evidence from a multi-platform sampling strategy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Physical and dynamical characteristics of a 300Â m-deep anticyclonic eddy in the Ligurian Sea (Northwest Mediterranean Sea): Evidence from a multi-platform sampling strategy Physical and dynamical characteristics of a 300Â m-deep anticyclonic eddy in the Ligurian Sea (Northwest Mediterranean Sea): Evidence from a multi-platform sampling strategy](/preview/png/6383344.png)
چکیده انگلیسی
We describe the physical and dynamical characteristics of a mesoscale anticyclonic eddy observed in August 2013 over the shelf-break region of the northeastern sector of the Ligurian Sea, between the northeastern edge of the Northern Current (NC) and the coast. Results derive from a dense dataset of temperature, salinity and current measurements obtained from a multi-platform sampling strategy as well as from a diagnostic simulation with the Regional Ocean Modeling System (ROMS) at a horizontal resolution of 1.8 km. Model results are obtained from a strong nudging to observations and, as they are physically balanced, they allow a three-dimensional diagnosis of the dynamics and physical characteristics of the eddy. The eddy is centered around 9.5°E, 43.94°N, about 20 km from the coast, and has a radius of 16 km. It is characterized by low-density waters and penetrates the thermocline down to at least 300 m reflecting the main features of the NC. Horizontal velocities near the surface are around 0.4 m sâ1, while at 150 m are still significantly high and close to 0.2 m sâ1. Vertical velocities were estimated from model results; absolute values are below 4 m dayâ1 until depths shallower than 150 m and increase with depth to 15 m dayâ1. The eddy's presence inverts the northwestwards flow traditionally portrayed in the region determining a southeastwards coastal circulation that replenishes coastal waters with those originating from the NC. We discuss several possible eddy formation mechanisms and suggest that its formation depends on the directionality of the NC when it enters the Ligurian Sea, as a result of the adjustment of the shear and orbital components of the current's relative vorticity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 116, October 2016, Pages 145-164
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 116, October 2016, Pages 145-164
نویسندگان
Ines Borrione, Silvia Falchetti, Alberto Alvarez,