The main objective of the COST Action 733 is to achieve a general numerical method for
assessing, comparing and classifying typical weather situations in the European regions. To
accomplish this goal, different workgroups are established, each with their specific aims:
WG1: Existing methods and applications (finished); WG2: Implementation and development of
weather types classification methods; WG3: Comparison of selected weather types
classifications; WG4: Testing methods for various applications.
The main task of Workgroup 4 (WG4) in COST 733 implies the testing of the selected weather
type methods for various classifications. In more detail, WG4 focuses on the following topics:•
Selection of dedicated applications (using results from WG1),
• Performance of the selected applications using available weather types provided by WG2,
• Intercomparison of the application results as a results of different methods
• Final assessment of the results and uncertainties,
• Presentation and release of results to the other WGs and external interested
• Recommend specifications for a new (common) method WG2
Introduction
In order to address these specific aims, various applications are selected and WG4 is divided in
subgroups accordingly:
1.Air quality
2. Hydrology (& Climatological mapping)
3. Forest fires
4. Climate change and variability
5. Risks and hazards
Simultaneously, the special attention is paid to the several wide topics concerning some other
COST Actions such as: phenology (COST725), biometeorology (COST730), agriculture (COST 734)
and mesoscale modelling and air pollution (COST728).
Sub-groups are established to find advantages and disadvantages of different classification
methods for different applications. Focus is given to data requirements, spatial and temporal
scale, domain area, specifi
