Claude Gibert

1
Introduction

• Claude Gibert
• Meteorological Operations Section (Metops).
• Areas of responsibilities
• Operational forecast verification and maintenance
  of verification / diagnostics software.
• Plot production and publication on the web site.
• Post-processing in operational suites.

2
Introduction

• Publication
• Graphical products on the web site, plots showing
  forecast and analysis fields, or verification
  results.
• Fields (GRIB) on data server reanalysis 40 years
  (ERA40) and DEMETER (EU project).
• Verification
• Deterministic and probabilistic forecast
• Database of pre-computed scores, extraction /
  plotting facilities

3
Publication (plots)

• Database of plots and plot descriptions.
  Currently
• 400,000 different images in the database
  (archiving).
• Update
• Daily 10,000 plots
• Weekly 3,000 plots
• Monthly 540
• Authoring can be done by non-experts.
• The complete production / update of plots is
  automatic.

4
Publication (plots)

• Access control
• Different types of organisations access the web
  site with different credentials, not all products
  are available to all users.
• Each product is given categories which specify
  which type of user can access it.
• There are three types of authentification
• Web login and password created by ECMWF
• User login and securID cards
• Domain users, recognised by their internet
  address.

5
Publication (data)

• Data server has been available for a couple of
  years. Data is available online
• Demeter data
• Re-analysis (ERA40)
• 1 Terabyte of data is kept.
• Usage
• 6000 different users from pretty much all
  countries in the World have been observed.
• 1 Terabyte of data served each month.

6
Verification

• A package enabling research and operations to
• Compute scores (deterministic, i.e. root mean
  square errors, correlation coefficient,
  anomaly-based scores)
• Extract scores
• Plot scores, mean values, time series, scatter
  plots
• Scores are computed both against analysis and
  observations.

7
Verification

• The verification package is being re-written.
• New types of verification are added (i.e.
  probabilistic)
• Diagnostics used routinely in Research are to be
  integrated.

8
Building blocks

• Web graphical products and data server rely on a
  web-application framework developed at ECMWF in
  2000 (OO Perl and FastCGI).
• Meteorological Python (MetPy) is an ECMWF Python
  extension to support data formats used in
  Meteorology (Fields and observations), score /
  diagnostics computation and plotting. It uses
  Magics which is an ECMWF graphics library
  specialised in plotting fields-based data.
• The verification package is built on MetPy
• Operational plot production carried out using
  MetPy.

9
RAQ Requirements on Web

• RAQ needs a
• Data archive,
• Plot display,
• Verification capability
• for daily forecasts
• 10 regional models
• to MM(?) days
• for NN variables?
• for LL levels?

10
GEMS Data Service Req.

• Archive Plot
• 3 separate reanalyses (GHG, GRG, AER)
• for 5 years each
• Global
• Agreed list of variables
• Archive
• Boundary conditions for 1 common frame and 1
  user- frame (1 per user)

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• a

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GEMS Archive in MARS

• All observations
• All still-useful experiments
• All reanalyses

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Have we captured all requirements?