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SISMER Syst

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Following OOPC and IOC/IODE XVI Conference (IODE-XVI-10) recommendation, an ... Second Meeting Announcement. September 2002, 16-17. MEDS. Ottawa, Canada ... – PowerPoint PPT presentation

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Title: SISMER Syst


1
SISMER Systèmes dInformations 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 Interna
tional Workshop for GODAR-WESTPAC Tokyo, 5-7
March 2002
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

3
2850 CTD Stations
4
4037 Bottle Stations in WestPAC
5
77 431 ARGO Profiles (54591 in WestPAC)
6
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/oc
    ean/)
  • 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

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.

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/

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 or 3 5
Correction/Interpolation 3 doubtfull
depth
10
QC1 Control of the location and Date VISUAL
CHECKS - Data collected in station
11
QC2 - Control of the Data points
12
QC2 - Control of the Data pointsVisual Checks
13
QC2 - Control of the Data pointsRegional
Adjustment for Broad Range Checks
14
QC2 - Control of the Data pointsMinimum
Maximum - Broad Range Check
0
200
2000
6000
15
QC1 Control of the location and Date - Time
series on fixed mooring
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 --gt flag4 à ce point
  • si non --gt flag4 aux 4 points et validation
    manuelle

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

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 lt 100 m 5
    écarts-type
  • Station du talus 200lt fond lt 500 4 écarts-type
  • station profonde fond gt 500 m 3 écarts-type

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

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
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