PROTEVS-MED field experiments: Very High Resolution Hydrographic Surveys in the Western Mediterranean Sea

Date 2018
Temporal extent 2015 -2018
Author(s) Dumas Franck1, Garreau PierreORCID2, Louazel Stephanie1, Correard Stephanie1, Fercoq Solenn1, Le Menn Marc1, Serpette Alain1, Garnier ValerieORCID2, Stegner Alexandre3, Le Vu Briac3, Doglioli Andrea4, Gregori Gerald4
Affiliation(s) 1 : SHOM, Service Hydrographique et Océanographique de la Marine, 13 rue de Chatellier, CS592803, 29228 Brest CEDEX 2, France
2 : IFREMER, Univ. Brest, CNRS UMR 6523, IRD, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, 29280, Plouzané, France
3 : Laboratoire de Météorologie Dynamique (LMD), CNRS UMR 8539, Ecole Polytechnique, 91128 Palaiseau, France
4 : Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
DOI 10.17882/62352
Publisher SEANOE
Note Data are provided by survey in a compressed tar files containing CSV and NetCDF files.
Keyword(s) Western Mediterranean Sea, High Resolution Transects, (Sub)Mesoscales Observations, Eddies, Fronts
Abstract

From 2015 to 2018 five field experiments (9 legs) have been performed in the Western Mediterranean Basin during winter or early spring. Thanks to the intensive use of a towed vehicle undulating in the upper oceanic layer between 0 and 400 meter depth (i.e. a Seasoar), a large amount of very high resolution hydrographic transects have been performed, to measure the mesoscale dynamics (slope current and its instabilities, anticyclonic eddies, sub-mesoscale coherent vortices, frontal dynamics convection events, strait outflows) and sub-mesoscale processes like stirring, mixed layer or symmetric instabilities. When available, the data were completed with velocities recorded by Vessel Mounted Acoustic Doppler Current Profiler (VMADCP) and by surface salinity and temperature recorded by ThermosalinoGraph (TSG). Some CTD casts have also been performed giving the background hydrography of the deep layers. In 2017, a Moving Vessel Profiler (MVP) has been deployed to manage even higher horizontal resolution. This data set is an unprecedented opportunity to investigate the very fine scale processes as the Mediterranean Sea is known for its intense and contrasted dynamics. It should be useful for modellers (who reduce the grid size below a few hundred meters) and expect to properly catch finer scale dynamics. Likewise, theoretical work could also be illustrated by in situ evidence embedded in this data set.

Licence CC-BY-NC
Acknowledgements The authors acknowledge that the French Government Defense procurement and technology agency (Délégation Générale de l’Armement) funded extensively through Protevs and Protevs II “programme d’étude amont” all the campains reported here.. 
They thank the technical team at the French Naval Hydrologic and Oceanographic Service (SHOM), the crews of the French Navy ship Beautemps-Beaupré, of the RV Pourquoi Pas ? and the RV L’Atalante for their contribution to the field experiments.
Sensor metadata

CTD and LADCP casts :

- presure  (Sea-bird SBE-9 ; 0 at surface)

- sea water temperature (Sea-bird SBE-9; SBE 3 temperature sensor)

- sea water electrical conductivity (Sea-bird SBE-9; SBE 4 conductivity sensor) 

- practical salinity units  (derived computation)

- Currents velocities : RDI 150 kHz current profiler

SEASOAR transects :

- sea water temperature (Sea-bird SBE-9; SBE 3 temperature sensor)

- sea water electrical conductivity (Sea-bird SBE-9; SBE 4 conductivity sensor) 

- oxygen sensor SBE-43 ; chlorophyll a WetStar WET Labs fluorometer ; optical properties sensor (WET Labs C-Star)  

- practical salinity units  (derived computation)

MVP200  transect : Moving Vessel Profiler equiped

- Temperature, Salinity :  AML CTD

Ship Equipement  :

- vmadcp : RDI Teledyne150 kHz /  38kHz.

- tsg : Seabird SBE-21 

Data
File Size Format Processing Access
protevsmed_swot_2018_leg2 Survey 436 MB CSV , NetCDF Open access
protevsmed_swot_2018_leg2 Quicklook 79 MB PDF Open access
protevsmed_swot_2018_leg1 Survey 94 MB CSV , NetCDF Open access
protevsmed_swot_2018_leg2 Quicklook 51 MB PDF Open access
protevsmed_2017_leg2 Survey 345 MB CSV , NetCDF Open access
protevsmed_2017_leg2 Quicklook 59 MB PDF Open access
protevsmed_2017_leg1 Survey 308 MB CSV , NetCDF Open access
protevsmed_2017_leg1 Quicklook 38 MB PDF Open access
protevsmed_2016 Survey 256 MB CSV , NetCDF Open access
protevsmed_2016 Quicklook 63 MB PDF Open access
protevsmed_2015_leg2 Survey 109 MB CSV , NetCDF Open access
protevsmed_2015_leg2 Quicklook 39 MB PDF Open access
protevsmed_2015_leg1 Survey 241 MB CSV , NetCDF Open access
protevsmed_2015_leg1 Quicklook 39 MB PDF Open access
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How to cite 

Dumas Franck, Garreau Pierre, Louazel Stephanie, Correard Stephanie, Fercoq Solenn, Le Menn Marc, Serpette Alain, Garnier Valerie, Stegner Alexandre, Le Vu Briac, Doglioli Andrea, Gregori Gerald (2018). PROTEVS-MED field experiments: Very High Resolution Hydrographic Surveys in the Western Mediterranean Sea. SEANOE. https://doi.org/10.17882/62352