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MEDAR 2002 Database and Network The MEDAR Group MEDAR/MEDATLAS II

MEDAR 2002 Database and Network The MEDAR Group MEDAR/MEDATLAS II Mediterranean Data Archaeology and Rescue of Temperature, Salinity and Bio-chemical Parameters. EC-Marine Science & Technology Programme Concerted Action (MAS3-CT98-0174/ERBIC20-CT98-0103). Rationale.

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MEDAR 2002 Database and Network The MEDAR Group MEDAR/MEDATLAS II

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  1. MEDAR 2002 Database and Network The MEDAR Group MEDAR/MEDATLAS II Mediterranean Data Archaeology and Rescue of Temperature, Salinity and Bio-chemical Parameters EC-Marine Science & Technology ProgrammeConcerted Action (MAS3-CT98-0174/ERBIC20-CT98-0103)

  2. Rationale • Long time series of basic oceanographic parameters are necessary for various scientific and technical studies • Temperature and salinity • Previous projects : MODB, MEDATLAS 1997 • Dissolved oxygen • Nutrients • Data still dispersed among the organizations which carry oceanographic cruises with the risk of being lost for the community • International program GODAR is preapring

  3. OBJECTIVES OF MEDAR/MEDATLAS • To compile and safeguard historical data • To make available comparable datasets • Common format • Common protocol for quality checks • To compute climatology for all the parameters • To publish and disseminate observed data and climatology • To enhance communication between scientists and data managers

  4. MEDAR GROUP

  5. PROJECT STRUCTURE

  6. NODC/DNA GAC IFREMER/France Benchmark 3 : OCT 2000 Benchmark 4 : JULY 2001 Final corrected data set : JUNE 2002 4 RDC Loading in the data base Errors Error list 1st Climatology November 2001 Pre-processing Benchmark 3 : NOVEMBER 2000 Benchmark 4 : SEPTEMBER 2001 Final data set : JULY 2002 AC GHER/Belgium Final Climatology October 2002 DATA CIRCULATION

  7. MEDAR 2002 DATABASEContent by data type

  8. MEDAR 2002 DATABASEContent by Parameters

  9. TEMPERATURE

  10. SALINITY

  11. DISSOLVED OXYGEN

  12. PHOSPHATE

  13. CHLOROPHYLL

  14. 2 5 9 1 3 4 0 No QC Correct Inconsistent Changed Missing Doubtful Bad QUALITY CHECKS All the data have been checked for quality according to the IOC/ICES and MAST recommendations: • QCO : Automatic check of the format • QC1 : Automatic and visual check of the headers and dupplicates • QC2 : Automatic and visual check of the data points As a result, the redundant data are eliminated and a quality flag is added to each numerical value (GTSPP flag scale) 1 9

  15. QC-1 : check of the time, location & duplicates Automatic Checks Result Duplicate data sets: E Date E or Ship velocity E or Location/shoreline E or Bottom sounding (ETOPO5) E= Elimination = Correction/Interpolation = Flag «Inconsistant with statistics» - no correction

  16. QC-2 : check of the data points Automatic Checks Result Pressure + one more observation (E) Out of the regional scale (min & max values) Increasing pressure Data below the bottom depth Coherence with pre-existing statisticsmean & standard deviation(LEVITUS, MODB, MEDATLAS) No constant profiles Spikes Vertical stability E= Elimination

  17. Regional Assembling & QC Implementation

  18. OUT OF STATISTICS DOUBTFUL FALSE GOOD NO QC Result of the Quality Checks

  19. CLIMATOLOGY – Objective analysis • Computation of Climatological Analysis by Variational Inverse Model (VIM) algorithms • Computation made on finite elements and then re-interpolated on a regular grid (0.2 degrees in Latitude and Longitude) • T, S and bio-chemical climatology reviewed by regional experts and modellers http://modb.oce.ulg.ac.be/Medar

  20. CLIMATOLOGY • Annual , seasonal and monthly climatology • Temperature, Salinity • Annual and seasonal • Oxygen, Silicate, Phosphate • Hydrogen sulphide (H2S) in the Black Sea • Annual only • Nitrate, Nitrite, PH, Ammonium, Alkalinity, Chlorophyll • No climatology • Total Phosphorus and Total Nitrogen

  21. CLIMATOLOGY : SOME EXAMPLES 2500 horizontal sections and stations location

  22. VERTICAL SECTIONS 2500 vertical sections and surface zoom

  23. DATA PRODUCT • CD-ROM 1 • HTML documentation on the project and its results • Cruise inventory • CD-ROM 2 • Observed data and SELMED tool for extraction and visualization. Export formats are MEDATLAS, CSV, ODV • CD-ROM 3 • Gridded climatology : Mediterranean sea and Western Mediterranean basins (maps, figures, numerical fields) • CD-ROM 4 • Gridded climatology : Black Sea and Eastern – Central Mediterranean basins (maps, figures, numerical fields) A SET OF 4 CD-ROMS

  24. CD-ROM2 : Observations Database • Total 285 879 multi-disciplinary profiles - A regional contribution to GODAR • SELMED tool for data extraction and visualization Export formats are MEDATLAS (with full meta-data), CSV (simplified format for Excel) or ODV (simplified format for import in WOCE Ocean Data View software)

  25. CONCLUSIONS • The wide international cooperation has made possible the realization of a comprehensive integrated data base which: • Doubles the volume of available observation data compared with the previous 1997 release • Gives information on the sources, the related cruises and the quality control methodology • Provides improved annual and seasonal gridded climatologogical fields valuable for scientific purposes like model initialisation and engineering studies in the Mediterranean & Black sea regions • Offers an easy access to the users and simple selection and visualisation tools • Furthermore, sharing expertise and knowhow among the partners, has contributed to : • Improve and standardize the data management methodologies • Enhance the whole MEDAR network as a distributed data management infrastructure, trained in data qualifying, processing, mapping, archiving and communication

  26. NEW PERSPECTIVES & TASKS TO MADE • MEDAR Database needs to be regularly updated by integrating : 1) data collected in recent cruises and data collected in real time by automatic systems 2) other important parameters such as pCO2 and current • MEDAR proposes to provide a direct access to the integrated data sets through a live access server on internet • The regular publication on electronic support should continue • Interface with other data servers shloud be provided More information on MEDAR on the distributed WWW site: www.ifremer.fr/medar

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