1. COST Action 733 - Meeting of the WG3 - Barcelona, 22-23.02.2008 Department of Meteorology Eötvös Loránd University Budapest, Hungary Rita Pongrácz, András Reisz, Judit Bartholy SUBJECTIVE SYNOPTIC EVALUATION OF THE CIRCULATION CLASSIFICATIONS FOCUSING ON HUNGARY

2. COST Action 733 - Meeting of the WG3 - Barcelona, 22-23.02.2008 Outline  Two sub-domains (07, 10) contain Hungary entirely  Selection of circulation classifications  Evaluation

3. COST Action 733 - Meeting of the WG3 - Barcelona, 22-23.02.2008 Selection of circulation classifications for evaluation  WSD (within-type standard deviation) - low EV (explained variation) - high  basis: year  MSLP, 2mT, LSP, CP  both subsectors 07 and 10

4. COST Action 733 - Meeting of the WG3 - Barcelona, 22-23.02.2008 Selected circulation classifications for evaluation  Sandra (23 / 19 types) CA, t-mode PCA, simulated annealing, using SLP  CEC (4×10 types) CA – seasons separately, AT-500 & AT-1000  ESLPC10 (10 types) similarity index for SLP  LWT2 (26 types) flow direction and vorticity, using SLP (improved Jenkinson-Collision system)  WLKC733 (40 types) using wind, AT-925, AT-500, wetness  Péczely (subjective, 13 types – only for the Carpathian basin), SLP

5. COST Action 733 - Meeting of the WG3 - Barcelona, 22-23.02.2008 Synoptic evaluation of circulation classifications  Missing / Odd / Frequency  Sandra: NNN - YNN (2 and 1)  CEC: NNY - YYN (3 and 0)  ESLPC10: NYN - YNN (1)  LWT2: NNN - YNN (2 and 1)  WLKC733: NNN - NNN (2)  Péczely: NNY (3)

6. COST Action 733 - Meeting of the WG3 - Barcelona, 22-23.02.2008 Synoptic evaluation of circulation classifications  Missing patterns? winter blocking, stable local cold mass above the Carpathian basin  Odd patterns? relates to isobar density (western and eastern part of the domain differ too much)  Frequency? on annual or seasonal basis?  Difference between sub-domains 07 and 10