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DYFAMED

Latitude and Longitude: 43.4167N, 7.8667E
Depth: 2300m
Oceanographic Region: Ligurian Sea, Mediterranean

News:The DYFAMED time-series site is part of the Mediterranean Ocean Observing System on Environment (MOOSE) and the HYDROCHANGES group

History of the Site:


In the framework of the France-JGOFS program, a long-term time-series investigation (DYFAMED: Dynamics of Atmospheric Fluxes in the MEDiterranean sea) has been initiated in 1988 in the north-western Mediterranean Sea. The DYFAMED site was first equipped with sediment trap moorings and visited punctually for hydrological monitoring. Atmospheric deposition survey was at the same time initiated in 1988 at the Cape Ferrat station. Since 1991, monthly cruises have been conducted and most of the JGOFS core parameters recorded. The DYFAMED time-series program was initiated during the JGOFS era on the model of BATS (Bermuda Atlantic Time-Series) and HOT (Hawaii Ocean Time-series) (Karl et al. 2003), with the objective of contributing to the comprehensive understanding of the global carbon cycle.

The objectives of the DYFAMED program are as follows:
  1. to study the variations of hydrology and biogeochemistry at the seasonal and interannual scale
  2. to investigate the ecosystem response to atmospheric deposition events and to long-term environmental/climate forcing;
  3. to investigate and understand the ecological effects of meteorological forcing, especially the transition in community structure from spring mesotrophy to summer oligotrophy;
  4. to estimate the air-to-sea exchange of carbon dioxide.

Parameters measured:

Atmospheric: Meteo France ODAS Buoy Cote d'Azur

The atmospheric observatory is located around 2 miles from the mooring and data are available in near realtime at http://www.meteo.shom.fr/real-time/html/dyfamed.html

Parameter Depths measured (m) Sensor Frequency
Wind speed and direction 3.5 m asl Vector Instruments A100L2/SRW1G-M 1/ hour (10 mn average)
Relative humidity 3 m asl Rotronic Hydroclip S3 1/ hour (10 s average)
Air temperature 3 m asl Pyrocontrole PT100 1/3 thermometer 1/ hour (10 s average)
SST 1 m Pyrocontrole EK 4494 PT100 1/5 classe A 1/ hour (10 s average)
Wave height and period surface Datawell Hippy-40 1/ hour (over 17.5 mn sample)

Sub-surface mooring: NB. data are not currently available in near real-time.

Parameter Depths measured (m) Sensor Frequency

Temperature 170, 200, 350, 500, 700, 1000, 1500, 2000 Seabird SBE 37 RS 232 and RBR 1min (RBR), 6 min (SBE37)
Salinity 200, 700, 1000, 2000 Seabird SBE 37 RS 232 6 min
Currents 200, 1000m RCM and Aquadopp 2 hours
Particle flux (Sediment traps) 200, 1000m Technicap PPS5 Water Bottle Samples

Monthly CTD Rosette profiler and water samples:

Parameter Depths measured (m) Sensor Frequency
Temperature profile 10 to 2300 SBE month (profile 5cm)
Salinity profile 10 to 2300 SBE month (profile 5cm)
Dissolved O2 profile 10 to 2300 SBE month (profile 5cm)
Dissolved O2 (bottles) 10, 20, 45, 60, 80, 100, 200, 500, 700, 1000, 1500, 2000 water samples month
Nutrients (bottles) 10, 20, 45, 60, 80, 100, 200, 500, 700, 1000, 1500, 2000 water samples month
AT-CT and pH (bottles) 10, 20, 45, 60, 80, 100, 200, 500, 700, 1000, 1500, 2000 water samples month
zooplankton 0 to 100m vertical tow Net WP2 month

 

 
 

Enhancement/Modifications planned within EuroSITES:


Continuation: Monthly sampling cruise at DYFAMED site for core parameters acquisition (physical, biogeochemical and biological).
Enhancement: Atmospheric parameters and higher resolution of temperature and salinity on sub-surface mooring added in 2009 to observe and record high frequency variability of water mass circulation in the Ligurian Sea (advection, diffusion and water mass convection). Sensors trialed in EuroSITES project at DYFAMED include:

Parameter Depths measured (m) Sensor Frequency
Deep oxygen consumption (2009-2010) 2000m IODA6000 (Optode Aanderaa O2) 6 min
Mesozooplankton (deployment planned December 2010) 0-100m (tbc) McLane ZPS ~ 5days

*Deployment of a joint IODA-ZPS mooring is planned for December 2010*

 

 

Contacts:


Principal Investigator: Dr. Laurent Coppola

 

Associated projects and links

DYFAMED website: http://www.obs-vlfr.fr/sodyf

The DYFAMED time-series site is part of the Mediterranean Ocean Observing System on Environment (MOOSE).

Dyfamed is also part of the HYDROCHANGES group

Also visit BOUSSOLE marine optics monitoring: http://www.obs-vlfr.fr/Boussole/

 


EC flag

EuroSITES is a FP7 Collaborative Project coordinated by the
National Oceanography Centre, Southampton, UK
 

Call FP7-ENV-2007-1, grant agreement N 202955
Sub-Activity 6.4.1. Earth Observation; Monitoring the ocean interior, seafloor, and subseafloor

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