Journal metrics

Journal metrics

  • IF value: 2.289 IF 2.289
  • IF 5-year value: 2.756 IF 5-year 2.756
  • CiteScore value: 2.76 CiteScore 2.76
  • SNIP value: 1.050 SNIP 1.050
  • SJR value: 1.554 SJR 1.554
  • IPP value: 2.65 IPP 2.65
  • h5-index value: 30 h5-index 30
  • Scimago H index value: 41 Scimago H index 41
Discussion papers | Copyright
https://doi.org/10.5194/os-2018-20
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 01 Mar 2018

Research article | 01 Mar 2018

Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Ocean Science (OS) and is expected to appear here in due course.

Wind induced variability in the Northern Current (North-Western Mediterranean Sea) as depicted by a multi-platform observing system

Maristella Berta1, Lucio Bellomo2,3, Annalisa Griffa1,4, Marcello Magaldi1,5, Anne Molcard2,3, Carlo Mantovani1, Gian Pietro Gasparini1, Julien Marmain6, Anna Vetrano1, Laurent Béguery7, Mireno Borghini1, Yves Barbin8, Joel Gaggelli8, and Céline Quentin8 Maristella Berta et al.
  • 1CNR-ISMAR, Lerici, Italy
  • 2MIO, Université de Toulon, CNRS, IRD, La Garde, France
  • 3MIO, Aix-Marseille Université, CNRS, IRD, Marseille, France
  • 4RSMAS, University of Miami, Miami, FL, USA
  • 5Johns Hopkins University, Baltimore, MD, USA
  • 6Degreane Horizon, Cuers, France
  • 7ACSA, 9 Europarc, 13590 Meyreuil, France
  • 8MIO, CNRS, Aix-Marseille Université, Université de Toulon, IRD, Marseille, France

Abstract. The variability and evolution of the Northern Current (NC) in the area off Toulon is studied for two weeks in December 2011 using data from a glider, a HF radar network, vessel surveys, a meteo station, and an atmospheric model. The NC variability is dominated by a synoptic response to wind events, even though a seasonal trend is also observed, transitioning from late summer to fall-winter conditions. With weak winds the current is mostly zonal and in geostrophic balance even at the surface, with a zonal transport associated to the NC of ≈1Sv. Strong westerly wind events (longer than 2–3 days) induce an interplay between the direct wind induced ageostrophic response and the geostrophic component: upwelling is observed, with offshore surface transport, surface cooling, flattening of the isopycnals and reduced zonal geostrophic transport (0.5–0.7Sv). The sea surface response to wind events, as observed by the HF radar, shows total currents rotated at ≈−55° to −90° to the right of the wind. Performing a decomposition between geostrophic and geostrophic components of the surface currents, the wind driven ageostrophic component is found to rotate of ≈−25° to −30° to the right of the wind. The ageostrophic component magnitude corresponds to ≈2% of the wind speed.

Download & links
Maristella Berta et al.
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Maristella Berta et al.
Maristella Berta et al.
Viewed
Total article views: 388 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
306 74 8 388 9 8
  • HTML: 306
  • PDF: 74
  • XML: 8
  • Total: 388
  • BibTeX: 9
  • EndNote: 8
Views and downloads (calculated since 01 Mar 2018)
Cumulative views and downloads (calculated since 01 Mar 2018)
Viewed (geographical distribution)
Total article views: 388 (including HTML, PDF, and XML) Thereof 388 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited
Saved
No saved metrics found.
Discussed
No discussed metrics found.
Latest update: 20 Jul 2018
Publications Copernicus
Special issue
Download
Short summary
The variability of the Northern Current (NC) in the NW Med Sea is studied using data from observations and models. The NC variability is dominated by a synoptic response to wind events, even though a seasonal trend is also observed. The combination of autonomous observing platforms with classical marine surveys provides high resolution datasets useful for specific scientific purposes but also for practical applications such as the management of marine shared resources in the Mediterranean Sea.
The variability of the Northern Current (NC) in the NW Med Sea is studied using data from...
Citation
Share