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SISMER Systèmes d’Informations Scientifiques pour la Mer F-NODC

SISMER Systèmes d’Informations Scientifiques pour la Mer F-NODC. Contribution to GODAR-WESTPAC from FRANCE Catherine Maillard, Michèle Fichaut, Loic Petit de la Villeon, Vincent Bernard SISMER, IFREMER Centre de Brest, BP 70, 29280 Brest Cedex, France www.ifremer.fr/sismer

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SISMER Systèmes d’Informations Scientifiques pour la Mer F-NODC

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  1. SISMERSystèmes d’Informations Scientifiques pour la MerF-NODC Contribution to GODAR-WESTPACfrom FRANCE Catherine Maillard, Michèle Fichaut, Loic Petit de la Villeon, Vincent Bernard SISMER, IFREMER Centre de Brest, BP 70, 29280 Brest Cedex, France www.ifremer.fr/sismer International Workshop for GODAR-WESTPAC Tokyo, 5-7 March 2002 1

  2. Data available at SISMER • 174 Data sets from French cruises have been transmitted to GODAR: • 50 CTD cruises = 2850 stations from1982-1999 • 124 bottle cruises = 4037 stations from 1957 - 1996 total 6887 stations • International real time data archived at ARGO/CORIOLIS data centre in 2001  • whole Pacific Ocean: 77 431 profiles from GTS •  West Pacific (60N -30 S & W120 E 150): 54591 profiles 2

  3. 2850 CTD Stations 3

  4. 4037 Bottle Stations in WestPAC 4

  5. 77 431 ARGO Profiles (54591 in WestPAC) 5

  6. 2 5 9 1 3 4 0 No QC Correct Inconsistent Changed Missing Doubtful Bad Quality Assurance QC0 : Check of format and completeness of information QC1 : Check of location, Date, Duplicates QC2 : Check of the data points Results : Elimination or Quality Flag : GTSPP Flag Scale References • ICES -GETADE Formatting Guidelines for Oceanographic Data Exchange (http://www.ices.dk/ocean/) • ICES -MDM QA Guidelines - CTD - Marine Data Management working Group (CIEM) Reports • UNESCO/COI/IODE : Manual of Quality Control Procedures for validation of Oceanographic Data - Manuals and Guides 26 • UNESCO/IOC/IODE : GF3 A General Formattin System for Geo-Referenced Data - Manual and Guides 17 6

  7. Sea Surface Salinity Project Following OOPC and IOC/IODE XVI Conference (IODE-XVI-10) recommendation, an Underway Sea Surface Salinity Data Archiving Project has been initiated with the objective of : • Swift assembly and distribution of data, ready availability and free access. • Data sets and products are comprehensive in terms of the variables • Encourage exploration of historical and paleo data sets. • Encourage processing methods that eliminate or minimize the production of spurious signals. • Ensure that adequate and timely data are available for the initialization and validation of climate forecast systems. • Maximize the utility of the sustained observing system for various process or intensive studies. • Work with GOOS/GCOS, World Weather Watch and Global Atmosphere Watch in development and implementation of the strategy. The JCOMM-1 meeting supported such a project urging that integration with other data collected at the same time be properly considered. 7

  8. SSSAL Preliminary Workplan • Working Groups • Data Collection • Transfer, Archiving, Processing • Products • Second Meeting Announcement • September 2002, 16-17 MEDS Ottawa, Canada • Review of available products and Information • http://www.ifremer.fr/sismer/program/sssal/ 8

  9. QC1 Control of the location and Date - Data collected in station Automatic Checks Results - Flag Duplicate data sets Elimination Date Elimination or 5 Ship/Platform velocity Elimination or 5 Location/shoreline Elimination or 5 Bottom sounding (ETOPO5) Elimination or3 5= Correction/Interpolation 3 = doubtfull depth 9

  10. QC1 Control of the location and Date VISUAL CHECKS - Data collected in station 10

  11. Automatic Checks Results - Flag Pressure + one more observation Elimination Out of the regional scale4 (min & max values) Increasing pressure4 Data below the bottom depth4 Coherence with pre-existing statistics (LEVITUS, REYNAUD, MODB, MEDATLAS) 2 No constant profiles 4 Spikes 3 Vertical stability 4 QC2 - Control of the Data points 11

  12. QC2 - Control of the Data pointsVisual Checks 12

  13. QC2 - Control of the Data pointsRegional Adjustment for Broad Range Checks 13

  14. QC2 - Control of the Data pointsMinimum & Maximum - Broad Range Check 0 200 2000 6000 14

  15. QC1: Control of the location and Date - Time series on fixed mooring 15

  16. QC2- Stabilité Verticale • Seuil de détection de l ’instabilité : • 0.03 en sigma-t pour stations profondes haute résolution • à.05 à 0.1 pour stations cotières • 4 points incriminés : 2 niveaux, T, S • Recherche d ’ autres anomalies sur chacun de ces 4 points • si oui --> flag=4 à ce point • si non --> flag=4 aux 4 points et validation manuelle 16

  17. QC2 - TESTS DE PIC • Test de gradient sur 2 points en début et fin de profil • Test de pic sur 3 points en cours de profil • seuil de gradient ajusté sur chaque zone géographique et niveau vertical 17

  18. QC2- Test de la climatologie • Plusieurs climatologies disponibles : Levitus 94, 98, Reynaud, Medatlas, MODB • par défaut Levitus 98 1x1 degré • Définition de l ’enveloppe de variabilité • Station du plateau continental fond < 100 m : 5 écarts-type • Station du talus 200< fond < 500 : 4 écarts-type • station profonde fond > 500 m : 3 écarts-type 18

  19. Tests Visuels « Subjectifs » • Test de la cohérence interne • QC1 : test de la route • QC2 : coherence interne des valeurs - décalages • Test de la cohérence externe • QC1 : rappel des positions d ’un autre fichier si au moins une position est dans le voisinage au même moment • QC2 : superposition des profils d ’un autre fichier • Levers de doute • stabilité verticale • pics • enveloppe climatologique mal définie 19

  20. FORMATS • Meta-Données : RDBS - ORACLE • Données - Observations • autodescriptive ASCII (MEDATLAS/CORIOLIS ASCII) • NetCDF  incluent le meta-données sous forme de mots-clé, obligatoire ou optionnels, également copiés dans la BD ORACLE • Données - données maillées • MODB/MEDMEX • ARGO 20

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