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.

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

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.

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:o Web login and password created by ECMWFo User login and securID cardso Domain users, recognised by their internet

address.

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.

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.

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.

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.

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?

GEMS Data Service Req.

Archive & Plot 3 separate reanalyses (GHG, GRG,

AER) for ~5 years each Global Agreed list of variablesArchive Boundary conditions for 1 common

frame and 1 user- frame (1 per user)

a

GEMS Archive in MARS

All observations

All still-useful experiments

All reanalyses

Have we captured all requirements?