MERCATOR French Ocean System: High-Resolution North Atlantic and Mediterranean Product (assimilation by optimal interpolation of altimetry data only)
Entry ID:
PSY2V1
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Summary
Abstract:
Mercator has been providing weekly analysis and real-time nowcast (T0), and forecast (T0+7 days and T0 +14 days) bulletins of the three-dimensional ocean in the North Atlantic and Mediterranean Sea since January 8th 2003. This High-resolution bulletin (PSY2V1; 1/15 degree; one point computed every 5 to 7 km throughout the region of interest; ... eddy-resolving) covers the North Atlantic
and Mediterranean basin. For more information see Mercator Configurations
Summary at http://www.mercator-ocean.fr/html/mod_actu/public/welcome_en.php3
Additional information about the Model:
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Mercator ocean system is based on the 8.1 version of the OPA z-coordinates code
(Madec et al. 1998). OPA is an incompressible Navier-Stokes primitive-
equation model using Boussinesq rigid-lid approximation that describes the
temporal evolution of velocity, temperature and salinity in three dimensions.
Mixed layer dynamic is ruled by TKE turbulent closure equations (1.5 closure
scheme) (Blanke et al. 1993). The ocean model configuration used in this
prototype (PSY2) is the high resolution (1/15 degrees) "Prototype Atlantique
Mediterranee" (PAM) between 9 degrees N and 70 degrees N with 43 vertical
levels with layer thicknesses from 6 meters at the surface to 200 meters at the
bottom of the Mediterranean basin and 300 meters at the bottom of the Atlantic
ocean. It includes a very simple thermodynamic ice model ('IF' ice model).
The bathymetry is processed from the Smith and Sandwell (1997) data base and
ETOPO5. Momentum and heat forcings are daily ECMWF forcing. Surface temperature
is restored from Reynolds analyses (Reynolds & Smith, 1994), which include
satellite and in-situ observations. Surface salinity is restored from
climatology. The model is initialized using Reynaud (Reynaud et al. 1998)
seasonal climatology. A relaxation to seasonal Medatlas (2002) climatology is
also applied below 500 meters in the Gulf of Cadiz to represent Mediterranean
Outflow Water.
Assimilation Method:
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The data assimilation method (SAM; Systeme d'Assimilation Mercator) used is the
reduced-order optimal interpolation (OI) scheme SOFA (Sub Optimal Filtering of
Altimetry) (De Mey and Benkiran, 2002) coupled with the PALM software coupler
(PALM group, 2000). The baroclinic component is corrected applying a
lifting-lowering method similar to Cooper and Haines method (1996). Data
assimilation is stopped along isobaths 500m towards the coast. Sea level
anomaly (SLA) from Jason1/ERS2-Envisat/GFO is assimilated along track, once a
week. The mean sea surface height (MSSH) used during the assimilation process
is the one from Rio et al. (2003) diagnosed from in-situ observations in the
Atlantic ocean. In the Mediterranean basin, MSSH is made out of several
numerical simulations. Version 1 products assimilates altimetry data (SLA)
only, while version 2 products assimilates altimetry and in situ data (SLA,
Sea Surface Temperature (SST), Sea Surface Salinity (SSS) and In situ
profiles).
Mercator bulletins contain a range of parameters selected to depict ocean
conditions and dynamics. These include: salinity, temperature, surface
currents, zonal, meridian and vertical velocities, transport, sea surface
height, mixed layer depth, barotropic height, baroclinic height. "Model:
analysis and forecasting" 3D ocean products can be accessed on-line through
Mercator Web Products (full domain and zonal animations, whole maps, zonal
maps, sections and moorings graphs). For additional product information see
http://www.mercator-ocean.fr/html/produits/description/welcome_en.html.
Mercator web products are designed for a wide audience (freely available),
while numerical products are files for professional users and are available on
a remote server. Please make an e-mail request to products@mercator-ocean.fr
Archive bulletins are also available to identify longer-term patterns.
Mercator web High-resolution North Atlantic and Mediterranean (PSY2V1, 1/15
degrees) products can be browsed on MERCATOR product web site:
http://bulletin.mercator-ocean.fr/html/welcome_en.jsp
In the Mersea strand1 european project context, Mercator makes available via an
DODS/Opendap server its PSY2 high-resolution prototype products since
01/06/2003. Mercator also offers access to its products via the LAS implemented
in the Mersea context. Fields provided for the Mersea inter-comparison
exercise are daily mean best estimate fields as well as T0+7 forecast. Class1
(2D and 3D oceanic variables), 2 (sections and moorings), 3 diagnostics are
provided on the Mercator-Mersea DODS/Opendap (password protected). For more
information see http://strand1.mersea.eu.org/html/strand1/datalinks.html
For more information about DODS/Opendap and Live Access Server (LAS), see
Numerical products handbook
http://www.mercator-ocean.fr/html/produits/description/welcome_en.html 
Related URL
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Description:
Mercator Ocean Main Webpage
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: 67.0
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S: -5.0
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E: 18.0
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W: -100.0
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Parent DIF
This data set description is a member of a collection. The
collection is described in
MERCATOR
Data Resolution
Latitude Resolution:
1/15 degrees (5-7km)
Longitude Resolution:
1/15 degrees (5-7km)
Vertical Resolution:
43 levels from surface to bottom (12-200m)
Temporal Resolution:
daily, weekly
Quality
ATTRIBUTE ACCURACY REPORT: Not provided
LOGICAL CONSISTENCY REPORT: Unknown
COMPLETENESS REPORT: Completeness information not available.
LINEAGE/PROCESS STEP:
PROCESS DESCRIPTION: Unknown
PROCESS DATE: Unknown
Access Constraints
ACCESS CONSTRAINTS: None
DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Use Constraints
None
Data Set Progress
COMPLETE
Personnel
Role:
DIF AUTHOR
Phone:
828-271-4800
Fax:
828-271-4876
Email:
ncdc.metadata at noaa.gov
Contact Address:
151 Patton Avenue
Room 468
City:
Asheville
Province or State:
North Carolina
Postal Code:
28801-5001
Country:
USA
Creation and Review Dates
DIF Creation Date:
2006-06-27
Last DIF Revision Date:
2011-07-21
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