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SISMERSISMER Systèmes d’Informations Scientifiques pour la Mer F-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-WESTPACTokyo, 5-7 March 2002

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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

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2850 CTD Stations

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4037 Bottle Stations in WestPAC

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77 431 ARGO Profiles (54591 in WestPAC)

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Quality Assurance

QC0 : Check of format and completeness of informationQC1 : Check of location, Date, DuplicatesQC2 : Check of the data pointsResults : 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

0 1 2 3 4 5 9

No QC Correct Inconsistent Doubtful Bad Changed Missing

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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.

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SSSAL Preliminary Workplan

Working Groups Data Collection Transfer, Archiving, Processing Products

Second Meeting Announcement September 2002, 16-17

MEDSOttawa, Canada

Review of available products and Information

http://www.ifremer.fr/sismer/program/sssal/

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QC1 Control of the location and Date - Data collected in station

Automatic Checks Results - Flag

Duplicate data sets EliminationDate Elimination or 5

Ship/Platform velocity Elimination or 5

Location/shoreline Elimination or 5

Bottom sounding (ETOPO5) Elimination or 3

5 = Correction/Interpolation 3 = doubtfull depth

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

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QC2 - Control of the Data points

Automatic Checks Results - FlagPressure + one more observation EliminationOut of the regional scale 4 (min & max values)Increasing pressure 4Data below the bottom depth 4Coherence with pre-existing statistics (LEVITUS, REYNAUD, MODB, MEDATLAS) 2No constant profiles 4Spikes 3Vertical stability 4

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QC2 - Control of the Data pointsVisual Checks

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

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QC2 - Control of the Data pointsMinimum & Maximum - Broad Range Check

0

200

2000

6000

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

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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

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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

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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

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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

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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